ASTM A285/A285M

ASTM A285/A285M is a specification for low and intermediate tensile strength carbon steel plates of pressure vessel quality for welded pressure vessel applications. The specification covers three grades, A, B, and C, which have different strength levels.

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Product Description

1.What are the chemical compositions and mechanical properties of ASTM A285/A285M?

Chemical Composition (wt%)

Element	Grade A	Grade B	Grade C	General Limits
Carbon (C)	≤0.24	≤0.27	≤0.30	–
Manganese (Mn)	0.70-1.05	0.80-1.20	0.90-1.35	–
Phosphorus (P)	≤0.035	≤0.035	≤0.035	–
Sulfur (S)	≤0.035	≤0.035	≤0.035	–
Silicon (Si)	–	–	–	≤0.15 (if specified)

Mechanical Properties

Property	Grade A	Grade B	Grade C
Yield Strength (min)	215 MPa (31 ksi)	240 MPa (35 ksi)	260 MPa (38 ksi)
Tensile Strength	415-550 MPa (60-80 ksi)	450-585 MPa (65-85 ksi)	485-620 MPa (70-90 ksi)
Elongation in 200 mm (8 in)	≥22%	≥22%	≥22%
Elongation in 50 mm (2 in)	≥25%	≥25%	≥25%

2.What are the characteristics of ASTM A285/A285M?

Low to Intermediate Strength: Designed for moderate-pressure applications.
Good Weldability: Low carbon and sulfur content reduce the risk of cracking during welding.
Formability: Suitable for cold forming (e.g., bending, rolling) due to its relatively low carbon content.
Normalized Condition: Optional normalization treatment can improve toughness and homogeneity.

3.What are the application scenarios of ASTM A285/A285M?

Low-pressure vessels(e.g., storage tanks, heat exchangers).
Structural components in moderate-temperature environments.
General industrial applications where moderate strength and good weldability are required.

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