AH36
Data verifiedAH36 is the most used high-tensile hull steel in the world — the 355 MPa grade that modern bulk carriers, tankers and container ships are built from. Strength and 0 °C toughness are certified plate-by-plate by the classification society.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.18 |
| Si | ≤0.50 |
| Mn | 0.90–1.60 |
| P | ≤0.035 |
| S | ≤0.035 |
| Note | Nb/V/Ti grain-refining per class rules |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥355 MPa |
| Tensile strength | 490–630 MPa |
| Impact | 0 °C, ≥34 J longitudinal (≤50 mm) |
| Density | 7.85 g/cm³ |
Heat treatment
Supplied normalized or TMCP under class survey; TMCP dominates modern AH36 plate.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | A131 AH36 |
| jis | KA36 (near) |
| gb | AH36 (GB/T 712) |
Compare side by side: AH36 vs AH32 · AH36 vs DH36
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Hull shells, main decks, hatch coamings, offshore topside structures.
Processing: High-heat-input welding is common in yards — order TMCP plate with guaranteed HAZ toughness for SAW panel lines.
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Ask for a quotationVisit NasteelSource: ASTM A131 / class rules published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.