ASTM A450 Precision Seamless Alloy Steel Pipe For Mechanical Structure

Instruction

ASTM A450 Precision Seamless Alloy Steel Pipe For Mechanical Structure

 

Material
The ASTM A450 standard covers precision seamless alloy steel pipes used for mechanical structures. These pipes are manufactured using high-quality alloy steel, which provides excellent strength, durability, and resistance to corrosion.

 

Specification
The ASTM A450 specification outlines the dimensional requirements and testing methods for precision seamless alloy steel pipes. It includes guidelines for the manufacturing process, material composition, and mechanical properties.

 

Chemical Composition
The chemical composition of precision seamless alloy steel pipes under ASTM A450 is as follows:

Element	Composition Range
Carbon (C)	0.20% max
Manganese (Mn)	0.40-1.10%
Phosphorus (P)	0.035% max
Sulfur (S)	0.035% max
Silicon (Si)	0.10-0.50%
Chromium (Cr)	0.15-0.25%
Nickel (Ni)	0.25% max
Copper (Cu)	0.25% max

 

Mechanical Properties
Precision seamless alloy steel pipes manufactured under ASTM A450 exhibit impressive mechanical properties, ensuring their suitability for mechanical structures. The following table outlines the typical mechanical properties:

Property	Value
Tensile Strength	520-670 MPa
Yield Strength	370-430 MPa
Elongation	20% min
Hardness (HB)	170-217 HBW
Impact Toughness	-20°C min

 

Steel Grade
The steel grade designation for precision seamless alloy steel pipes complying with ASTM A450 is typically specified by the manufacturer. Commonly used steel grades include:
• A450 Grade 4130
• A450 Grade 4140
• A450 Grade 4340

 

Application
The ASTM A450 precision seamless alloy steel pipes find extensive applications in various mechanical structures. They are commonly used in the manufacturing of high-strength machine components, such as shafts, gears, and structural supports. Moreover, their excellent resistance to corrosion makes them suitable for use in demanding environments, such as marine and offshore industries.