ASTM A536 80-55-06 Ductile Iron

ASTM A536 80-55-06 Ductile Iron

ASTM A536 80-55-06 is a special grade of ductile cast iron. It is a relatively good material for having comparatively high tensile strength and elongation.

Today, we will share the mechanical properties and chemical composition with you.

1. Mechanical Properties of Ductile Iron ASTM A536 80-55-06 

Tensile Strength ≥ 550 MPa (80,000 psi). Yield Strength ≥ 380 MPa (55,000 psi).  Elongation ≥ 6%.

The hardness range of this grade is 180 – 250 HB. (Brinell Hardness) without heat treatment. However, there is no strict stipulation for this grade.

2. Chemical Composition of Ductile Iron ASTM A536 80-55-06 

The foundries could adjust the chemical composition according to their production experience.  But make sure to meet the requirements of mechanical properties in the Standards.

The following chart is an approximate chemical composition range, which can not be used to production guide.

ASTM A536 C % Si % Mn % P % S % Mg %
80-60-03 3.00-3.60 2.30-2.90 0.30-0.600 ≤0.06 ≤0.04 0.030-0.055

3. Equivalent Grades of Ductile Iron ASTM A536 80-55-06

On account 0f most ductile iron grades require the tensile strength 500 MPa or  600 MPa, there is no equivalent grade to ASTM A536 80-55-06. In consequence, this material grade becomes special. Nevertheless, this grade is similar to 70-50-05 and 80-60-03. You just need to adjust the chemical composition to increase tensile strength and elongation.

4. Applications of Ductile Iron ASTM A536 80-55-06 

This material grade has been used for producing many types of iron castings, thanks to its comparatively high tensile strength and elongation. And it is a favorite ductile iron material grade of American clients.

The main applications of this grade are manhole covers, tractor iron partscradle brackets of hydraulic cylinder, agricultural machinery partsplow points, and automotive parts. The followings are some ductile iron parts made by our Yide Casting (Jinma Foundry) in China.

truck casting from Chinacast iron Brackets

Agricultural machinery car pedalcast iron auto parts

Yide casting is an experienced casting foundry, specialized in casting iron for 28years, can manufacture the casting iron parts according to your drawing file and requirement. If you are looking for a casting manufacturer, please feel free to contact us for more details, and you are welcome to visit our factory for more details.

ASTM A536 60-42-10 Ductile Cast Iron

ASTM A536 60-42-10 Ductile Cast Iron

ASTM A536 60-42-10 is a special grade of ductile iron according to the American standard.

This grade is equivalent to ISO 450-10, China QT450-10, Germany EN-GJS-450-10, UK 420/12, Italy GS400-12.

The yield strength of ductile cast iron 70-50-05 is no less than 290MPa, the tensile strength is no less than 415MPa, and the elongation (L0=50mm tensile test bar) is no less than 10%.

This grade of ductile iron is suitable for special applications, such as pipes, fittings etc. In practice, Grade 80-55-06 is better than this grade. Therefore, many clients will use 65-42-12 ductile cast iron instead.

This material grade has middle tensile strength, but the elongation is high. That means it is strong and ductile enough. Therefore, unless you have special reasons, otherwise, the equal grade 65-42-12 may be a better choice.

In standard ASTM A536, there is no requirement to the chemical composition. That means the iron foundry could adjust the chemical composition according to their experience. However, the mechanical properties are the necessary requirement.

You can find the mechanical requirement to ASTM A536 60-42-10 in the chart below:

 

 

ASTM A536 65-45-12 Ductile Cast Iron

ASTM A536 65-45-12 Ductile Cast Iron

ASTM A536 65-45-12 is a kind of ductile iron according to the American standard.

The yield strength is not less than 448MPa, the tensile strength is not less than 310MPa, and the elongation (L0=50mm tensile test bar) is not less than 12%. It is equivalent to China’s QT450-10.

 

 

  • Malleable cast iron

Malleable cast iron, referred to as tough iron. Obtained from white cast iron after annealing treatment, graphite is distributed in clusters. Its structural properties are uniform, wear-resistant, and have good plasticity and toughness. Used to manufacture parts with complex shapes and capable of withstanding strong dynamic loads.

  • Iron-carbon alloy

An iron-carbon alloy with a carbon content of more than 2%. Industrial cast iron generally contains 2% to 4% carbon. Carbon is mostly present in the form of graphite in cast iron, and sometimes in the form of cementite.

  • White cast iron

The content of carbon and silicon is low, and the carbon mainly exists in the form of cementite, and the fracture is silvery white. Large shrinkage during solidification, easy to produce shrinkage holes and cracks. It has high hardness and high brittleness and cannot bear impact load. It is mostly used as blanks of malleable cast iron and making wear-resistant parts.

YIDE casting is a professional casting foundry, specialized in cast iron since 1993s, provides both casting and machining service for the casting ductile iron casting parts, if you are interested in our casting service, please feel free to contact us for more details.

ASTM A536 70-50-05 Ductile Cast Iron

ASTM A536 70-50-05 is a high grade of ductile iron according to the American standard.

The yield strength of ductile cast iron 70-50-05 is no less than 345MPa, the tensile strength is no less than 485MPa, and the elongation (L0=50mm tensile test bar) is no less than 5%. It is equivalent to ISO grade 500-7, China QT500-7, Germany GGG50, EN-GJS-500-7, UK 500/7, Australia 500-7.

This grade of ductile iron is suitable for special applications, such as pipes, fittings etc. In practice, Grade 80-55-06 is better than this grade. Therefore, many clients will use 80-55-06 ductile cast iron instead.

Standard ASTM A536 has no requirement to the chemical composition. Hence the iron foundry could adjust the chemical composition according to their experience. However, the mechanical properties are the necessary requirement.

This material grade has high tensile strength, but the elongation is not high. That means it is strong, but does not have good ductility. Therefore, unless you have special reasons, otherwise, the equal grade 80-55-06 may be a better choice.

The following is the mechanical requirement to this grade.