A537 Cl.1
Data verifiedASTM A537 Class 1 is a heat-treated carbon-manganese-silicon vessel plate — essentially A516 chemistry given a normalizing treatment to refine the grain and lift toughness and strength for thicker, more demanding vessels and low-temperature storage.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.24 |
| Si | 0.15–0.50 |
| Mn | 0.70–1.35 (≤40 mm) |
| P | ≤0.025 |
| S | ≤0.025 |
| Cu | ≤0.35 |
| Ni | ≤0.25 |
| Cr | ≤0.25 |
| Mo | ≤0.08 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥345 MPa (≤65 mm) |
| Tensile strength | 485–620 MPa (≤65 mm) |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied normalized (Class 1). Class 2 is the quenched-and-tempered version of the same chemistry with higher strength.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | A537 Class 1 |
Compare side by side: A537 Cl.1 vs A516 Gr.70 · A537 Cl.1 vs P265GH
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Pressure vessels, API 650/620 storage tanks for refrigerated and pressurised product, spheres, low-temperature process equipment.
Processing: Welds like a quality C-Mn vessel plate with standard low-hydrogen practice; normalizing after hot forming may be needed to restore properties.
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Ask for a quotationVisit NasteelSource: ASTM A537 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.