ASTM

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ASTM

we have obtained ISO 9001, ISO 14001, ISO 45001, CE, AAA-level credit rating certification, etc.

ASTM A571/A571M pipeSuppliers,Manufacturers in china
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ASTM A571/A571M

Date:2022-03-31View:703Tags:seamless pipe, carbon pipe,stainless pipe,octg pipe manufacturers

Scope:

1.1 This specification2 covers austenitic ductile iron, Type D-2M, Classes 1 and 2, for compressors, expanders, pumps, valves, and other pressure-containing parts intended primarily for low-temperature service.

1.2 These grades of austenitic ductile iron are characterized by having their graphite substantially in a spheroidal form and free of flake graphite. They are essentially free of carbides and contain sufficient alloy content to produce a stable austenitic matrix down to −423°F [−252°C] (liquid hydrogen).

Properties

Property

Temperature

Value

Comment

Density

23.0 °C


6.8 - 7.8 g/cm³

 

Typical for Cast Iron

Mechanical

Property

Temperature

Value

Comment

Charpy impact energy

23.0 °C


20 J

 

 

Elastic modulus


23.0 °C


152 GPa

 

Typical for Cast Iron

Elongation


23.0 °C


30 %

 

 

Hardness, Brinell


23.0 °C


121 - 171 [-]

 

 

Poisson's ratio


23.0 °C


0.27 [-]

 

Typical for Cast Iron

Shear modulus

23.0 °C


41 GPa

 

Typical for Cast Iron

Tensile strength


23.0 °C


450 MPa

 

 

Yield strength Rp0.2

23.0 °C


205 MPa

 

 

Thermal

Property

Temperature

Value

Comment

Melting point

 


1120 °C

 

Typical for Cast Iron

Specific heat capacity


23.0 °C


460 - 527 J/(kg·K)

 

Typical for Cast Iron

Thermal conductivity


23.0 °C


55 W/(m·K)

 

Typical for Cast Iron

Chemical properties

Property

Value

Carbon


2.2 - 2.7 %

 

Chromium


0.2 %

 

Manganese


3.75 - 4.5 %

 

Nickel


21 - 24 %

 

Phosphorus


0.08 %

 

Silicon


1.5 - 2.5 %

 

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