AISI 1018 SAE UNS G10180 Carbon Steel Foundry

Steel foundry in China for producing AISI 1018 SAE UNS G10180 Carbon Steel castings. Today we will introduce the chemical composition, physical and mechanical properties and equivalent material grades of AISI 1018 Carbon Steel.

Chemical Composition

The chemical composition of AISI 1018 carbon steel is outlined in the following table.

Element Content (%)
Manganese, Mn 0.60-0.90
Carbon, C 0.15-0.20
Sulfur, S 0.05 (max)
Phosphorous, P 0.04 (max)
Iron, Fe Balance

Physical Properties

The physical properties of this grade of carbon steel are as below.

Properties Metric Imperial
Density 7.87 g/cm3 0.284 lb/in3

Mechanical Properties

The following table shows mechanical properties of cold drawn AISI 1018 carbon steel.

Properties Metric Imperial
Tensile strength 440 MPa 63800 psi
Yield strength 370 MPa 53700 psi
Modulus of elasticity 205 GPa 29700 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poisson’s ratio 0.29 0.29
Elongation at break (in 50 mm) 15% 15%
Hardness, Brinell 126 126
Hardness, Knoop (converted from Brinell hardness) 145 145
Hardness, Rockwell B (converted from Brinell hardness) 71 71
Hardness, Vickers (converted from Brinell hardness) 131 131
Machinability (based on AISI 1212 steel. as 100 machinability) 70 70

Thermal Properties

The thermal properties of this grade material are showed as the table below.

Properties Metric Imperial
Thermal conductivity 51.9 W/mK 360 BTU in/hr.ft2.°F

Other Designations

Other designations that are equivalent to AISI 1018 carbon steel include:

AMS 5069 ASTM A29 ASTM A512 ASTM A611 (D-1) ASTM A635
AMS 5069A ASTM A510 ASTM A794 ASTM A519 ASTM A544
ASTM A549 ASTM A659 SAE J412 SAE J1397 MIL S-11310 (CS 1018)
ASTM A576 SAE J403 SAE J414 MIL J-1397 MIL J-403

Fabrication and Heat Treatment

  • Machinability

AISI 1018 carbon steel is rated at 62% of AISI 1112 carbon steel. Machining can provide this alloy with a good finish and continuous and hard chips. The alloy can be processed under all conditions.

  • Forming

It is easy to form this grade of carbon steel under annealing conditions.

  • Welding

AISI 1018 carbon steel can be welded using most conventional methods, such as gas, acetylene oxide, resistance and submerged fusion welding.

  • Heat treatment

This Grade can be surface hardened to Rc 42, but only in thin sections. If the thicker part exceeds 4 in. , You can get Rc 28-30.

  • Forging

AISI 1018 carbon steel can be forged in the range of 996-1260°C (1825-2300°F).

  • Thermal processing

AISI 1018 carbon steel can be easily hot processed.

  • Cold working

The cold working of AISI 1018 carbon steel will affect the hardness and mechanical properties. Intermediate annealing must be performed to overcome the alloy’s tendency to work hardening.

  • Annealing

The alloy can be fully annealed by soaking at 899°C (1650°F) and then cooling in the furnace. Process annealing can be carried out at a temperature of 649°C (1200°F).


AISI 1018 carbon steel is commonly used in high-volume screw machine parts applications. We can also find this alloy in applications as shafts, spindles, pins, rods, sprocket assemblies.

Yide casting is a leading iron foundry, provides casting iron service and machining service for our customers. As a professional casting manufacturer, we also cooperate with many domestic trade company, and known as a quality iron casting and brass casting factory, we track every order for our customer, and keep order file and casting sample, you can check the orders at any time in the future, if you are looking for a casting iron foundry, please feel free to contact us, send us your drawing file, we will produce a casting sample according to your parameters, and do the test by ourself, then send it to you.