Shipbuilding steel plate
DH32
This higher-strength class carries impact testing at −20°C, specified for higher-strength structural members exposed to lower service temperatures.
Mechanical properties
- Grade class
- Higher strength
- Minimum yield ReH
- 315 MPa
- Tensile strength Rm
- 440–570 MPa
- Elongation A5
- 22%
- Impact test temperature
- -20 °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 DH32 is verified by Charpy V-notch testing at -20°C, per IACS UR W11.
Not sure what ReH or TMCP mean? See the glossaryStock & dimensions
Rolled to order for this grade. Send thickness, dimensions and tonnage for a lead time.
Thickness tolerance reference (EN 10029 / ASTM A6)Also supplied as bulb flat
DH32 is also held as bulb flat bar for hull framing.
View bulb flat availabilityClassification 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 DH32
- ABS DH32
- DNV DH32
- GL DH32
- BV DH32
- LR DH32
- RINA DH32
- KR DH32
- NK DH32
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 DH32 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 DH32 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.
Related grades
Not sure which grade? Use the selection guideTell us the grade, thickness and tonnage.
Send grade, thickness, dimensions and tonnage. You get availability, price and a lead time, normally within 24 hours.
Agregar al carrito de RFQ