Seamless steel pipe knowledge: American standard ASTM A283D Chemical composition and mechanical properties
ASTM A283 Grade D is a carbon structural steel plate with low to medium tensile strength, widely used in structural fields such as construction, bridges, and pressure vessels. The following is its detailed chemical composition and mechanical properties:
Chemical composition (melting analysis, maximum value%)
table
Element content (%)
Carbon (C) ≤ 0.27
Silicon (Si) 0.15-0.40 (adjusted according to thickness)
Manganese (Mn) ≤ 0.90
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.040
Copper (Cu) ≥ 0.20 (minimum value)
Note: Some materials mention that the typical carbon content can be as low as 0.17%, which is suitable for higher toughness application scenarios.
mechanical properties
table
Performance index values (metric) values (imperial)
Yield Strength ≥ 230 MPa ≥ 33000 psi
Tensile Strength 415-550 MPa 60000-80000 psi
Elongation after fracture ≥ 20% (gauge length 200mm)
≥ 23% (gauge length 50mm) -
Cold bending test 180 °, bending center diameter d=2t (t ≤ 20mm) or d=3t (t>20mm), no cracks -
This material has good weldability, formability, and processability, and is suitable for conventional welding methods such as arc welding, gas shielded welding, etc.
Application scenarios
Riveted/bolted connections in bridges and building structures
Pressure vessels, boilers, and engineering machinery components
Ship structure, large equipment support structure
General welded structural components such as brackets, shells, pipelines, etc
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