Shipbuilding steel plate

AH36

Core stockCertificación multi-sociedad de clasificación

This higher-strength class carries impact testing at 0°C. Higher yield strength allows thinner sections for the same load-bearing capacity, commonly specified for larger bulk carriers, tankers and container ships.

Mechanical properties

Grade class: Higher strength
Minimum yield ReH: 355 MPa
Tensile strength Rm: 490–630 MPa
Elongation A5: 21%
Impact test temperature: 0 °C

Impact energy in joules is not listed here because it varies with plate thickness and specimen orientation. The value that governs your order is the one on the mill test certificate, issued per heat.

Impact toughness for AH36 is verified by Charpy V-notch testing at 0°C, per IACS UR W11.

Not sure what ReH or TMCP mean? See the glossary

Stock & dimensions

Thickness: 5–22 mm
Widths: 1,800 / 2,000 mm
Lengths: 8,000 / 10,000 mm

Thickness tolerance reference (EN 10029 / ASTM A6)

Currently in stock

Thickness	Width	Length	Availability
8 mm	1,800 mm	10,000 mm	Enquire
10 mm	1,800 mm	10,000 mm	Enquire
12 mm	1,800 mm	10,000 mm	Enquire
8 mm	2,000 mm	10,000 mm	Enquire
10 mm	2,000 mm	10,000 mm	Enquire
12 mm	2,000 mm	10,000 mm	Enquire

Also supplied as bulb flat

AH36 is also held as bulb flat bar for hull framing.

View bulb flat availability

Low-residual-stress option available

AH36 is also available as low-residual-stress hot-rolled plate — lower residual stress, less warping after cutting and welding. Developed and validated with CSSC Guangzhou Shipyard International, and already in batch use on car-ferry and tanker thin-plate structures.

About low-residual-stress plate

Classification society approvals

Material is produced at the WISCO mill, which holds works approval from the nine classification societies below. Material is released with the mill test certificate for the relevant heat.

CCS AH36
ABS AH36
DNV AH36
GL AH36
BV AH36
LR AH36
RINA AH36
KR AH36
NK AH36

How to read a mill test certificate

Standards & cross-reference

This grade is also recognized under ASTM A131/A131M (the U.S. shipbuilding-steel specification) and GB/T 712 (the Chinese national shipbuilding-steel standard), both of which use the same AH36 designation as the IACS classification-society rules.

General structural-steel standards such as EN 10025 (Europe) or JIS G3106 (Japan) are not classification-society approved for ship hulls and are not interchangeable with AH36 on a classed vessel — see the grade selector page for a worked example (AH36 vs A36). AH36 vs A36

Welding & cutting

Cutting

Both oxy-fuel (flame) and plasma cutting are suitable for this thickness range; cut to your drawing or DXF file.

Welding & preheat

Higher-strength grades (AH32/AH36 series) have a higher carbon equivalent than normal-strength grades, so thicker sections or restrained joints may call for preheat and low-hydrogen consumables to avoid hydrogen cracking. Exact preheat temperature depends on thickness, carbon equivalent and joint restraint — confirm against your yard's WPS and the classification society's requirements rather than a fixed rule of thumb.

AH32315 MPa DH32315 MPa EH32315 MPa DH36355 MPa EH36355 MPa

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Espesor (mm)Tonelaje / cantidad