ASME SA537 Class 1 is a normalized carbon-manganese-silicon steel plate used primarily for pressure vessels and boilers, offering excellent toughness and strength at moderate temperatures. Below, I provide a detailed comparison with its key equivalent materials based on international standards. The equivalents include ASTM A537 Class 1 , EN 10028-2 P355GH, DIN 17155 19Mn6, JIS G3115 SPV355 , and ASTM A671 Gr. CD70.
Chemical Composition Comparison:
|
Element |
ASME SA537 Class 1 (%) |
ASTM A537 Class 1 (%) |
|---|---|---|
|
Carbon (C) |
0.24 max |
0.24 max |
|
Manganese (Mn) |
0.70-1.35 (≤40mm) 1.00-1.60 (>40mm) |
0.70-1.35 (≤40mm) 1.00-1.60 (>40mm) |
|
Phosphorus (P) |
0.035 max |
0.035 max |
|
Sulfur (S) |
0.035 max |
0.035 max |
|
Silicon (Si) |
0.15-0.50 |
0.15-0.50 |
|
Copper (Cu) |
0.35 max (if specified) |
0.35 max (if specified) |
|
Nickel (Ni) |
0.25 max (if specified) |
0.25 max (if specified) |
|
Chromium (Cr) |
0.25 max (if specified) |
0.25 max (if specified) |
|
Molybdenum (Mo) |
0.08 max (if specified) |
0.08 max (if specified) |
Mechanical Properties Comparison:
|
Property |
ASME SA537 Class 1 |
ASTM A537 Class 1 |
|---|---|---|
|
Yield Strength (min) |
50 ksi (345 MPa) |
50 ksi (345 MPa) |
|
Tensile Strength |
70-90 ksi (485-620 MPa) |
70-90 ksi (485-620 MPa) |
|
Elongation (50mm, min) |
22% |
22% |
|
Elongation (200mm, min) |
18% |
18% |
ASTM A537 Class 1 and ASME SA537 Class 1 steel plates are essentially the same material: a heat-treated carbon-manganese-silicon steel for fusion-welded pressure vessels and boilers, with ASME SA537 being the American Society of Mechanical Engineers' adoption of the ASTM A537 standard, making them functionally identical with matching composition and properties, used in oil, gas, and petrochemical industries for high-pressure service. Both require normalization for enhanced strength and toughness, offering alternatives to standard A516 grades for demanding applications.
Key Characteristics
Material Type: Heat-treated Carbon-Manganese-Silicon Steel.
Condition: Delivered in the Normalized condition.
Properties: Higher yield and tensile strength than standard A516 grades, excellent notch toughness.
Applications: Pressure vessels, boilers, storage tanks, heat exchangers, oil & gas, petrochemical industries.
Strength: Tensile Strength: 70-90 ksi (485-620 MPa); Yield Strength (min): 50 ksi (345 MPa).
