What Is Iron Casting?

What Is Iron Casting?

What Is Iron Casting?

What Is Iron Casting?

Gray iron is the most common type of iron casting. Its properties are good, making it the preferred material for a wide variety of applications. Its properties include high hardness, tensile strength, compressive strength, fatigue strength, and resistance to corrosion. While this type of iron casting is highly versatile, its disadvantages include low tensile strength and low elongation. It is a great choice for applications that require high tensile strength.

Yide Casting produces medium and heavy castings with sectional sizes up to four inches. It is the only iron foundry to cast the full range of test bar sizes. Inoculated irons are stronger than base iron bars and have a greater scatter of tensile strength values. A six-inch-diameter section at this foundry shows tensile strength values below the SAE line. The tensile strength data on this material are based on the center portion of the 6-in.-pediatric sections.

Gray iron is highly resistant to cracks. Its mechanical properties are related to the percentage of graphite, and the carbon-equivalent value. The cooling rate and eutectic solidification interval play an important role in the tensile strength of gray iron. The section size affects the tensile strength. The ASTM Specification A 48 requires the selection of the test bar. If the gray metal has an elongation value of less than 0.5, it will be stronger. The failure section should be as large as possible.

When choosing an iron casting foundry, it’s important to choose one that processes ductile iron separately from gray iron. The former is more malleable and durable than ductile. However, some foundries process gray and ductile iron from the same charge material. For example, if a foundry was to process internal recycled scrap gray iron, the sulfur would remain in the material. The solution would be to use a reducing agent, such as CaO, to remove the sulfur.

Graphite is another element used in iron casting. Its gray color is a result of a process known as investment casting. The investment-casting process produces pieces with thin walls and is usually used for ductile iron. Centrifugal casting, on the other hand, has the advantage of reducing porosity and sturdiness of the finished part. In addition, the material is also more resistant to corrosion, which is a positive feature for the investment-grade material.

The gray iron found in commercial castings is the most affordable of the two types of iron. This type of iron has a high modulus of elasticity and is suitable for structural components that must be stiff. On the other hand, it is prone to thermal fatigue, so it is not recommended for housing and machinery bases. Its high tensile strength and elasticity to make it the best choice for these applications. It is a great choice for those who want to save money.

Casting Defects – Sand Mold, Metal Casting

Today, I will introduce you to various metal casting defects and pictures found in the manufacturing process of yide casting. These are common sand casting defects on the surface and inside of cast iron and cast steel parts.

1. Blowhole and Pinhole

This is a void defect, which is also divided into pinholes and underground pores. Pinholes are very small holes, some can be seen on the surface. Underground air holes can only be seen after machining or grinding.

After machining or grinding, most underground pores can be found. If the surface is flat, our yide casting can inspect them by ultrasonic flaw detector.

Pinhole defect

2. Sand Burning Defect

This defect includes chemical burns and metal penetration. Usually, you will see excess metal material around the corner. This is because of poor sand. The metal has penetrated into the sand mold.

Sand burning defect

3. Sand Inclusion and Slag Inclusion

These defects are also called scab or black scab. They are inclusion defects. It looks like there is slag inside the metal casting.

Sand inclusion defects

4. Sand Hole Defects

Sand hole is a typical shrinkage defect. After sandblasting or machining, you will see voids. The sand falls from the sand mold, rolls into the liquid metal, and creates blisters.

This is a problem of the sand mold, or the flow rate of the metal is too high. This decfect can be solved by the foundry.

Sand hole defect

5. Cold lap Defect

Also called cold shutdown. This is a crack with rounded edges. The cold lap is due to a lower melting temperature or a poor gate system. This is not just a surface defect. Generally, this location may cause air leakage, and in addition, the material at this location will be of poor quality and therefore may be fragile.

Cold lap defect

6. Flash, Fin and Burrs

The joint flash is also called a casting fin, which is a thin protrusion on the surface of a metal casting. During the cleaning and sanding process, the joint burrs should be removed.

Sharp fins and burrs are similar problems with burrs. In fact, the large flash is a casting problem, the foundry should improve it by modifying the pattern. However, the small fins and burrs are not casting defects, the foundry only needs to grind and remove them.

Flash, Fin and Burrs

7. Mistrun defect

This is an incomplete casting defect, resulting in unfinished casting. The edges of the defect are rounded and smooth.

Mistrun defect

8. Porosity Shrinkage Defect

Shrinkage defects include scattered shrinkage, micro-shrinkage and porosity. For the large porosity on the surface, you can easily see them. However, for the smaller dispersion shrinkage, you can see them after processing. The figure below shows the shrinkage of porosity. The density of the metal is very poor, and many small holes can be seen after processing.

Porosity shrinkage defect

9. Shrinkage Cavities Defect

These are also called shrinkage cavities, which are a serious type of shrinkage defect, and you can easily see these holes on the rough surface of the metal casting. Foundries can improve their gates and ventilation systems, and then can solve these shrinkage problems.

Shrinkage defect

10. Shrinkage Depression

This defect is also a type of shrinkage defect, which looks like a recessed area on the surface of a metal casting. Although this defect is not as serious as shrinkage, it still leads to poor surface quality, and there may be some internal defects, so the foundry should try to solve or improve it.

Shrinkage Depression

11. Elephant skin defects

This is a surface defect that can cause irregularities or wrinkles on the surface. This defect is caused by the temperature difference of the molten metal or poor sand mold.

Elephant skin defects

12.Veins Defect

It is also called rat tail and looks like many small water traces on the surface of a metal casting. Sometimes this is caused by the low temperature of the molten metal or the improper gate control and exhaust system.

Veins Defect

13.Rough surface

A rough surface is also a surface defect. A normal rough surface cannot be considered a defect, but a surface that is too rough and uneven will be a defect.

Rough surface defects

14. Mismatch and displacement defects

This kind of mold defect is caused by the displacement of mold burrs. It will cause the parting line to be misplaced. Near the parting line, the left side may be a few millimeters lower or higher than the other side. The parting line is not a defect, but if the height on the left is different from the height on the right, it will be a casting defect. If there is no special requirement, a mismatch of less than 1mm is allowed. For the sand casting process, no mismatch is impossible.

However, if the mismatch affects the function of the casting, the foundry must control it, grind or machine it to meet the requirements.

Mismatch mold defects

 

15. Mechanical damage

This is not a casting defect, but a real casting quality problem you may encounter. This is damage during machining or delivery. Workers should pay more attention to this problem.

Mechanical damage defect

16.  Slag Inclusions Defects

This kind of defect is also called foreign inclusions, slag inclusions. Generally, slag is made of molten metal. During the metal melting process, the foundry should thoroughly remove dirt and inclusions, otherwise, these inclusions will be poured into the casting.

Slag inclusion defects

17. Raised Mold Defect

Due to the scattering of the liquid metal, the mold bottle is raised, causing the top of the casting to become higher or thicker than the lower part.

Raised Mold Defect

18. Crack defect

Crack defects usually occur inside metal castings. This defect will reduce the physical properties of the metal casting. There are also cracks on the surface.

Crack defect

19. Abnormal Nodulizing Defect

For many reasons, the spheroidization rate of graphite of ductile cast iron will be affected, resulting in poor spheroidization rate. Through the metallographic microscope, you can hardly see the graphite balls, but you can see many worm-like graphites.

This is a substantive issue. If so, its mechanical properties will not meet the standard requirements, which may cause damage to the cast product during use.

Abnormal Nodulizing Defect

20. Uneven hardness defects

This means that the hardness on the same surface is not uniform. The hardness is not uniform, and some parts may have extremely high hardness. When processing to a harder position, processing will become more difficult. The drill bit may be damaged.

This is a substantive issue. Locations with higher hardness may cool down faster than localized areas.

Uneven hardness

21. Sand Drop Defect

It is also called crushed sand. Some lumps of sand fall from the sand mold, which will result in similarly shaped sand holes or incompleteness. This is a problem of sand molds. The sand mold may not be tight enough.

Sand Drop Defect

22. Deformation problem

This problem will result in excessive flatness and straightness tolerances. For long castings and flat castings with thin walls, this is a very common defect. The reason is the natural deformation of the sand mold or the air during the cooling process. Sometimes, excessive sandblasting may also cause this problem.

Deformation problem

23. Welding Repair Problem

After welding repair, even after mechanical processing or polishing, welding traces are still visible. For unimportant casting surfaces, these marks should be acceptable if the customer allows welding repairs. However, for locations subject to high pressure, or the customer expressly prohibits any welding repairs, these marks will be considered defects.

Welding repair mark

24. Cold Iron Mark

Cast iron can effectively reduce the shrinkage of key parts, so it is very common to use cast iron in cast iron plants. However, the edges of the cold iron can be clearly found by visual inspection. If these marks do not affect the appearance, some customers will not need to grind them. However, customers may require the casting manufacturer to grind them in order to obtain a better surface appearance. Please be clear that these marks should not be considered as casting defects.

Cold Iron Mark

25. Casting chilling defects

It is also called “white iron”. The surface of the casting with this defect will be very white, shiny and smooth. Defective castings are fragile and brittle, so some edges and tips will break during processing. This defect is caused by the low temperature of the sand mold, and it leaves the sand mold prematurely, so the hot iron is quickly cooled. Appropriate annealing heat treatment on them can solve this defect.

Casting chilling defects

26. Massive Free Carbide

On the metallographic photos, you can see many cemented carbides without fish bones. This is a serious defect of cast iron materials and usually occurs in ductile iron. Due to reverse cooling defects and poor inoculation, there will be qualityless carbides, which will lead to brittleness to ductile iron and poor welding performance. High temperature annealing heat treatment can improve its quality.

Massive Free Carbide

27. Cold short or short iron

This defect is also called internal sweating. There are iron beans in the casting. This is because of the unreasonable gate control design, causing some molten iron to suddenly become beans, and then these beans are wrapped in other molten iron. These are surface defects, but if they are located in critical locations, they can cause serious slurry problems.

Cold short iron

28. Stripping Defect

The iron sheet on the surface of the casting is very thin. Two floors. This is because the gating system is unreasonable, resulting in a very thin air layer. This defect is a surface defect, so it can usually be ground off. However, if it is not just on the surface, it should be discarded.

Stripping Defect

29. Cast Iron Graphite Floatation

This defect is a material problem. This is caused by low pouring temperature and high carbon content. This defect is very harmful and can lead to very fragile materials. On the fractured surface, you can see the obvious black surface caused by the defect.

Cast Iron Graphite Floatation

Surface Finish Degree (Smoothness) Comparison Table between Rz, Ra and RMS for Iron and Steel Castings

What standard can be used to express the surface finish or smoothness of steel castings?

The comparison table we made as below is for your reference. You can find the comparison of the new Chinese Ra and Rz standards with the American micron and micron inch Ra in this table. In addition, we have also borrowed from China’s old grading system for your reference. The old grade is still widely used in China. We usually call the downward-pointing triangle “hwar”. However, we usually do not recommend buyers to indicate the old grades of China on the drawings or inquiry sheets. The comparison is for reference only, not as an inspection standard.

This article is from www.yidecasting.com. Please keep this link! For more related articles, please refer to our blog.

China Old GradeChina New
Ra
China New
Rz
USA micron
Ra
USA microinch
Ra
▽ 150200
▽ 225100
▽ 312.550
▽ 46.3258.00320
6.30250
▽ 53.212.55.00200
4.00160
3.20125
▽ 61.66.32.50100
2.0080
1.6063
▽ 70.86.31.2550
1.0040
0.8032
▽ 80.43.20.6325
0.5020
0.4016
▽ 90.21.60.2012.5
10
8
▽ 100.10.80.10

 

RMS (microinch)RMS
(µm)
RA (microinch)RA
(µm)
Grit Size
80 58
47
34
17
14
2.03 1.47
1.2
0.6
0.43
0.36
71 52
42
30
15
12
1.90 1.32
1.06
0.76
0.38
0.30
80 120
150
180
240
320

Casting flask, Moulding flask, Sand box, Moulding box

Casting flask is also called moulding flask, sand box or moulding box. It is an indispensable tool in the production of sand castings. At the same time, it also plays an important role in the casting process. A suitable sand box can improve the quality of casting and reduce the consumption of molding sand, thereby reducing production costs.

Casting flasks are usually made by welding steel plates. But it can also be made by sand casting process. In other words, the sand box itself can also be a sand casting. For the automatic molding line, the casting flask has a fixed size. Taking the FBO 3 automatic molding line as an example, the size of the flask should be 508 * 610mm.

If the iron foundry does not have a suitable casting flask, then they will have to make some casting flasks for production. There are many types and sizes of sandboxes. The small flask is suitable for the production of small metal castings, and the large flask is suitable for large castings. Their shapes include circles and squares. Sometimes, some reinforcing ribs are welded inside to fix the molding sand. During the casting process, all designs need to be considered to suit production. However, the flask of the automatic molding line cannot be changed. Only packaging boxes used for manual molding and resin sand molding processes can be used.

Generally, unless you want the iron foundry to speed up production, the purchaser of castings does not have to bear the cost of manufacturing the sand box. More flasks can greatly increase productivity.

Yide Machinery casting factory uses FBO automatic molding line to produce iron castings parts for vehicles, cars, trucks, tractors, plow points etc. The following are some casting flasks from Yide Casting.

Introduction of Iron Based Coated Sand Casting

Brief introduction of iron based coated sand casting:

Iron based coated sand casting is a casting production technology. In the 1970s, Chinese foundry workers developed a special casting technology method, which is based on the research of domestic and foreign foundry counterparts, and in combination with China’s national conditions. It is different from sand casting, lost wax casting, V-shape casting, permanent mold casting, shell mold casting, paraffin casting, ceramic casting, steel shot casting and other casting methods. This method uses a metal model, and the cast iron cavity that is close to the shape of the casting as the sand box iron mold. And then the near-shaped iron mold is covered with a layer of 6~10mm of coated sand to form a mold for pouring into a casting.

 

  • The process of iron based coated sand casting includes:

Machine modeling-checking and closing the box-placing the sprue cup in the lock box-pouring-unpacking the casting-sand cleaning-modeling.

 

  • Features of iron based coated sand casting:

1. Having the characteristics of sand casting

That is, having a rigid sand mold shell, which makes the sand mold high in overall strength without deformation. At the same time, it has wide adaptability, easy demoulding of castings, reliable positioning and high precision.

2. Having the characteristics of coated sand shell casting.

The modeling is convenient and fast. No matter what the casting sand mold is, the molding can be completed within two or three minutes. The sand density and surface hardness of the mold are guaranteed by the equipment and are always consistent. And do not need to apply any paint. The smooth casting is obtained, and the shape and dimensional accuracy of the casting are improved.

3. Having the characteristics of metal mold casting.

The iron mold has obvious chilling effect during the crystallization process of molten metal. This can refine the grain size of the casting, thereby improving the overall strength of the casting. The presence of sand tires avoids the shortcomings of metal mold casting. Castings will not produce white holes. For iron castings, it can produce various materials in the as-cast state without heat treatment.

4. High precision

The mold composed of iron mold and thin sand tire has high rigidity, small deformation and fast cooling after locking. Meanwhile, the obtained casting has high dimensional accuracy, small machining allowance and compact structure. It is especially suitable for the production of ductile iron. At the same time, the method use the graphitization expansion of ductile iron to self-feed, and produce castings with less and no risers. Thus to obtain high-quality castings. Because the iron mold cools quickly, it is effective for the production of high-grade pearlite substrates. Rod and shaft castings are particularly advantageous.

5. High hardness

Under normal circumstances the hardness of castings produced by iron based coated sand casting is about 20 HB units higher than those produced by ordinary casting methods.

6. Low investment

Using the waste heat of the cast iron mold to solidify the coated sand produced by recycling, not only reduces electricity consumption, but also the casting process presents a closed cycle production state. In the meantime, the production area is small, requiring no sand treatment equipment, low investment and quick results.

7. Reuse of the mould

Due to the chilling of the iron mold, the molding sand will not be overfired. Not only can the molding sand be reused, but also because of the roasting during the pouring process, the molding sand (quartz sand) undergoes a phase change, and the thermal expansion coefficient of the sand is reduced from 15 to 5. Therefore, the old sand produced in the production process can also be recycled, which is in line with the development of circular economy.

8. Low rejection rate

Iron based coated sand casting is particularly suitable for the production of large batches of medium and small castings. If there are few replacements, the overall rejection rate can be reduced to about 3%.

9. Long service life

The service life of the iron mold with sand-coated iron mold can reach more than 10,000 times. However, under the influence of long-term repeated thermal expansion and contraction and the casting environment, additional maintenance is required.

Small Cast Door

Small cast doors are small doors made of cast iron, also called small cast iron doors. Depending on the application, there are many types of cast iron doors. For example, cast doors used on boilers are called ash doors; and cast doors used on stoves, fireplaces and stoves called furnace doors. Small cast doors mean […]

Comparison Table of Stainless Steel Grades

Stainless steel is also called acid-resistant stainless steel. It has good corrosion resistance, is beautiful, does not fade and is easy to clean. Moreover, its service life is very long. Stainless steel castings are widely used in auto parts, household appliances and construction industries.

The following is a comparison table of stainless steel grades provided by China Yide Casting for your reference.

Table 1 (Including Germany)

Notype

China

Russia

Germany

France

Japan

America

British

International standard

Sweden

(GB)(TOCT)(DIN)(NF)(JIS)AISI/ ASTMUNSSAE(BS)(ISO)(SS14)
1

austenitic stainless steel

 

1Cr17Mn6Ni5N12X17T9AH4SUS201201S2010030201A-2
21Cr18Mn8Ni5N12X17T9AH4X8CrMnNi189Z15CNM19.08SUS202202S2020030202284S16A-32357
31Cr18Mn10Ni5Mo3N
42Cr13Mn9Ni420X13H4T9
51Cr17Ni709X17H7ЮX12CrNi17.7Z12CN17.07SUS301301S3010030301301S2114
61Cr17Ni8X12CrNi17.7SUS301J1
71Cr18Ni912X18H9X12CrNi18.8Z10CN18.09SUS302302S3020030302302S25122331
8Y1Cr18Ni9X12CrNiS18.8Z10CNF18.09SUS303303S3030030303303S21172346
9Y1Cr18Ni9Se12X18H10ESUS303Se303SeS3032330303Se303S4117
101Cr18Ni9Si3X12CrNiSi18.8SUS302B302BS3021530302B
110Cr18Ni908X18H10X5CrNi18.9Z6CN18.09SUS304304S3040030304304S15112332
2333
1200Cr18Ni1003X18H11X2CrNi18.9Z2CN18.09SUS304L304LS3040330304L304S1210
130Cr19Ni9NSUS404N1304NS30451
140Cr19Ni10NbNX5CrNiNb18.9SUS304N2XM21S30452
1500Cr18Ni10NX2CrNiN18.10Z2CN18.10SUS304LN304LNS30453304S622371
(Az)
161Cr18Ni1212X18H12TX5CrNi19.11Z8CN18.12SUS305305S3050030305305S1913
170Cr18Ni128X18H12T、06X18H11X5CrNi19.11Z8CN18.12
180Cr23Ni13X7CrNi23.14SUS309S309SS3090830309S
190Cr25Ni20SUS310S310SS3100830310S2361
200Cr17Ni12Mo208X17H13M2TX5CrNiMo18.10Z6CND17.12SUS316316S3160030316316S1620,20a2347
211Cr17Ni12Mo210X17H13M2T
220Cr18Ni12Mo2Ti08X17H13M2TX10CrNiMoTi18.10Z6CNDT17.12320S312343
320S17-2350
231Cr18Ni12Mo2Ti10X17H13M2TX10CrNiMoTi18.10Z8CNDT17.122350
2400Cr17Ni14Mo203X17H14M2X2CrNiMo18.10Z2CND17.12SUS316L316LS3160330316L316S1219,19a2353
250Cr17Ni12Mo2NSUS316N316NS31651
2600Cr17Ni13Mo2NX2CrNiMoN18.12Z2CND17.12SUS316LN316LNS31653316S612375
(AZ)
270Cr18Ni12Mo2Cu2SUS316J1
2800Cr18Ni14Mo2Cu2SUS316J11
290Cr18Ni12Mo3Ti08X17H15M3TZ6CNDT17.13
301Cr18Ni12Mo3Ti10X17H13M3TX10CrNiMoTi18.12Z8CNDT17.13B
310Cr19Ni13Mo308X17H15M3TX5CrNiMo17.13SUS317317S3170030317317S1625
3200Cr19Ni13Mo303X16H15M3X2CrNiMo18.16Z2CND19.15SUS317L317LS31703317S12242367
330Cr18Ni16Mo5SUS317J1
341Cr18Ni9Ti12X18H9TX12CrNiTi18.9Z10CNT18.10SUS321321S3210030321321S202337
350Cr18Ni10Ti08X18H10TX10CrNiTi18.9Z6CNT18.11SUS321321S3210030321321S1215
361Cr18Ni11Ti12X18H10T321S20
370Cr18Ni11Nb08X18H12BX10CrNiNb18.9Z6CNNb18.10SUS347347S3470030347347S17162338
381Cr18Ni11Nb12X18H12B
390Cr18Ni9Cu3Z6CNU18.10SUSXM7XM7S30430D32
400Cr18Ni13Si4SUSXM15J1XM15S38100
41 

Austenitic stainless steel, ferrite stainless steel

(Duplex stainless steel)

 

0Cr26Ni5Mo208X21H6M2TX8CrNiMo275SUS329J1329S329002324
421Cr18Ni11Si4AlTi15X18H12C4TЮ
431Cr21Ni5Ti12X21H5T
4400Cr18Ni5Mo3Si2
4500Cr24Ni6Mo3N
46

ferrite stainless steel

0Cr13A11X12CЮX7CrAl13Z6CA13SUS405405S4050051405405S1722302
4700Cr12SUS410L
481Cr15SUS429429S4290051429
4900Cr17SUS430LX
501Cr1712X7X8Cr17Z8C17SUS430430S4300051430430S1582320
51Y1Cr17X12CrMoS17Z10CF17SUS430F430FS4302051430F8a2383
521Cr17MoX6CrMo17Z8CD17.01SUS434434S4340051434434S179c2325
5300Cr17MoSUS436L
5400Cr18Mo2SUS44418Cr2Mo
55

Martensite stainless steel

1Cr25Ti15X25TX8Cr28446S44600514462322
5600Cr27MoZ01CD26.1SUSXM27XM27S44625
5700Cr30Mo2SUS447J1S44700
581Cr12SUS403403S4030051403403S172301
590Cr1308X13X7Cr13、X7Cr14Z6C13SUS410S410SS41008430S171
601Cr1312X13X10Cr13Z12C13SUS410410S4100051410410S2132302
611Cr13MoX15CrMo13SUS410J1
62Y1Cr13X12CrS13Z12CF13SUS416416S4160051416416S2172380
632Cr1320X13X20Cr13Z20C13SUS420J1420S4200051420420S374

Table 2 (Including European Union)

NoChina  GBJapanAmericaKoreaEuropean UnionIndiaAustraliaChina Taiwan
Old GradeNew GradeJISASTMUNSKSENISASCNS

Austenitic stainless steel

11Cr17Mn6Ni5N12Cr17Mn6Ni5NSUS201201S20100STS2011.437210Cr17Mn6Ni4N20201-2201
21Cr18Mn8Ni5N12Cr18Mn9Ni5NSUS202202S20200STS2021.4373 202
31Cr17Ni712Cr17Ni7SUS301301S30100STS3011.431910Cr17Ni7301301
40Cr18Ni906Cr19Ni10SUS304304S30400STS3041.430107Cr18Ni9304304
500Cr19Ni10022Cr19Ni10SUS304L304LS30403STS304L1.430602Cr18Ni11304L304L
60Cr19Ni9N06Cr19Ni10NSUS304N1304NS30451STS304N11.4315304N1304N1
70Cr19Ni10NbN06Cr19Ni9NbNSUS304N2XM21S30452STS304N2304N2304N2
800Cr18Ni10N022Cr19Ni10NSUS304LN304LNS30453STS304LN304LN304LN
91Cr18Ni1210Cr18Ni12SUS305305S30500STS3051.4303305305
100Cr23Ni1306Cr23Ni13SUS309S309SS30908STS309S1.4833309S309S
110Cr25Ni2006Cr25Ni20SUS310S310SS31008STS310S1.4845310S310S
120Cr17Ni12Mo206Cr17Ni12Mo2SUS316316S31600STS3161.440104Cr17Ni12Mo2316316
130Cr18Ni12Mo3Ti06Cr17Ni12Mo2TiSUS316Ti 316TiS316351.457104Cr17Ni12MoTi20316Ti 316Ti
1400Cr17Ni14Mo2022Cr17Ni12Mo2SUS316L316LS31603STS316L1.4404~02Cr17Ni12Mo2316L316L
150Cr17Ni12Mo2N06Cr17Ni12Mo2NSUS316N316NS31651STS316N316N316N
1600Cr17Ni13Mo2N022Cr17Ni13Mo2NSUS316LN316LNS31653STS316LN1.4429316LN316LN
170Cr18Ni12Mo2Cu206Cr18Ni12Mo2Cu2SUS316J1STS316J1316J1316J1
1800Cr18Ni14Mo2Cu2022Cr18Ni14Mo2Cu2SUS316J1LSTS316J1L316J1L
190Cr19Ni13Mo306Cr19Ni13Mo3SUS317317S31700STS317317317
2000Cr19Ni13Mo3022Cr19Ni13Mo3SUS317L317LS31703STS317L1.4438317L317L
210Cr18Ni10Ti06Cr18Ni11TiSUS321321S32100STS3211.454104Cr18Ni10Ti20321321
220Cr18Ni11Nb06Cr18Ni11NbSUS347347S34700STS3471.455004Cr18Ni10Nb40347347

Austenitic stainless steel, ferrite stainless steel (Duplex stainless steel)

230Cr26Ni5Mo2SUS329J1329S32900STS329J11.4477329J1329J1
2400Cr18Ni5Mo3Si2022Cr19Ni5Mo3Si2NSUS329J3LS31803STS329J3L1.4462329J3L329J3L

Ferrite stainless steel

250Crl3Al06Crl3AlSUS405405S40500STS4051.400204Cr13405405
26022Cr11TiSUH409409S40900STS4091.4512409L409L
2700Cr12022Cr12SUS410LSTS410L410L410L
281Cr1710Cr17SUS430430S43000STS4301.401605Cr17430430
291Cr17Mo10Cr17MoSUS434434S43400STS4341.4113434434
30022Cr18NbTiS439401.4509439439
3100Cr18Mo2019Cr19Mo2NbTiSUS444444S44400STS4441.4521444444
Martensite stainless steel
321Cr1212Cr12SUS403403S40300STS403403403
331Cr1312Cr13SUS410410S41000STS4101.400612Cr13410410
342Cr1320Cr13SUS420J1420S42000STS420J11.402120Cr13420420J1
353Cr1330Cr13SUS420J2STS420J21.402830 Cr13420J2420J2
367Cr1768Cr17SUS440A440AS44002STS440A440A440A

Yide casting is a leading casting foundry in China, with 27 years’ experience, produces top quantity steel castings. If you are interested in our cast steel, please feel free to contact us for more details on casting.

Equivalent Grades of Gray iron and Ductile iron

This is a comparison table for the gray iron and ductile iron grades of various standards, from Yide foundry, including ISO, GB, ASTM, DIN, EN, JIS, UNI, NF, BS, IS, UNF, NBN, AS, SS, NS.

 

CountryStandard

Equivalent Grades of Gray Iron (Grey Cast Iron)

ISOISO 185100150200250300350
ChinaGB 9439HT100HT150HT200HT250HT300HT350
USAASTM A48NO.20
NO.25
NO.30NO.35NO.40
NO.45
NO.50NO.55
NO.60
Germany
Austria
DIN 1691GG10GG15GG20GG25GG30GG35GG40
EuropeanEN 1561EN-GJL-100EN-GJL-150EN-GJL-200EN-GJL-250EN-GJL-300EN-GJL-350
JapanJIS G5501FC100FC150FC200FC250FC300FC350
ItalyUNI 5007G10G15G20G25G30G35
FranceNF A32-101FGL150FGL200FGL250FGL300FGL350FGL400
UKBS 1452100150200250300350
IndiaIS 210FG150FG200FG260FG300FG350FG400
SpainUNFFG15FG20FG25FG30FG35
BelgiumNBN 830-01FGG10FGG15FGG20FGG25FGG30FGG35FGG40
AustraliaAS 1830T150T220T260T300T350T400
SwedenSS 14 01O110O115O120O125O130O135O140
NorwayNS11 100SJG100SJG150SJG200SJG250SJG300SJG350
CountryStandard

Equivalent Grades of Ductile iron (SG Iron, Nodular Graphite Iron)
Refer to iron-foundry.com

ISOISO 1083400-15
400-18
450-10500-7600-3700-2800-2900-2
ChinaGB 1348QT400-18QT450-10QT500-7QT600-3QT700-2QT800-2QT900-2
USAASTM A53660-40-1860-42-10
65-45-12
70-50-0580-55-06
80-60-03
100-70-03120-90-02
Germany
Austria
DIN 1693GGG40GGG50GGG60GGG70GGG80
EuropeanEN 1563EN-GJS-400-15
EN-GJS-400-18
EN-GJS-450-10EN-GJS-500-7EN-GJS-600-3EN-GJS-700-2EN-GJS-800-2EN-GJS-900-2
JapanJIS G5502FCD400FCD450FCD500FCD600FCD700FCD800
ItalyUNI 4544GS370-17GS400-12GS500-7GS600-2GS700-2GS800-2
FranceNF A32-201FGS370-17FGS400-12FGS500-7FGS600-2FGS700-2FGS800-2
UKBS 2789400/17420/12500/7600/7700/2800/2900/2
IndiaIS 1865SG370/17SG400/12SG500/7SG600/3SG700/2SG800/2
SpainUNFFGE38-17FGE42-12FGE50-7FGE60-2FGE70-2FGE80-2
BelgiumNBN 830-02FNG38-17FNG42-12FNG50-7FNG60-2FNG70-2FNG80-2
AustraliaAS 1831300-17
400-12
500-7600-3700-2800-2
SwedenSS 14 070717-020727-020732-030737-010864-03
NorwayNS11 301SJK-400.3
SJK-400
SJK-500SJK-600SJK-700SJK-800

AISI 1070 SAE UNS G10700 Carbon Steel Foundry

China’s steel foundry produces AISI 1070 SAE UNS G10700 carbon steel castings. In the following, we will be divided into various parts to introduce you to the chemical composition, physical and mechanical properties of the material, as well as the equivalent material grade.

Chemical Composition

The chemical composition of AISI 1070 carbon steel is outlined in the following table.

ElementContent (%)
Iron, Fe~ 98
Carbon, C0.65 – 0.75
Manganese, Mn0.60 – 0.90
Sulfur, S0.050 (max)
Phosphorous, P0.04 (max)

Physical Properties

The physical properties of AISI 1070 carbon steel are tabulated below.

PropertiesMetricImperial
Density7.7-8.03 g/cm30.278-0.290 lb/in³

Mechanical Properties

The following table shows mechanical properties of cold drawn AISI 1070 carbon steel.

PropertiesMetricImperial
Elastic modulus190-210 GPa29700-30458 ksi
Poisson’s ratio0.27-0.300.27-0.30

Thermal Properties

The thermal properties of AISI 1070 carbon steel are given in the following table.

PropertiesConditions
T (ºC)Treatment
Thermal expansion co-efficient11.8 x (10-6/ ºC)0 – 100

Other Designations

Other designations that are equivalent to AISI 1070 carbon steel includes: AMS 5115, AMS 5115C, ASTM A29 (1070), ASTM A510 (1070), ASTM A576 (1070), ASTM A682 (1070), ASTM A713 (1070), ASTM A830, MIL S-11713, MIL S-12504, SAE J1397 (1070), SAE J403 (1070), SAE J412 (1070), DIN 1.1231, SS 1770, SS 1778, AFNOR XC 68.