Shipbuilding steel plate
EH36
This higher-strength class carries impact testing at −40°C, the highest notch-toughness requirement among higher-strength grades, specified for critical structural members in low-temperature service.
Mechanical properties
- Grade class
- Higher strength
- Minimum yield ReH
- 355 MPa
- Tensile strength Rm
- 490–630 MPa
- Elongation A5
- 21%
- Impact test temperature
- -40 °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 EH36 is verified by Charpy V-notch testing at -40°C, per IACS UR W11.
Definitions of ReH, TMCP and other terms: 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
EH36 is also held as bulb flat bar for hull framing.
View bulb flat availabilityClassification society approvals
Plate is produced at the WISCO mill, which holds works approval from the nine classification societies below. Plate is released with the mill test certificate for the relevant heat.
- CCS EH36
- ABS EH36
- DNV EH36
- GL EH36
- BV EH36
- LR EH36
- RINA EH36
- KR EH36
- NK EH36
Bulb flat bar in this grade is produced at the Hubei Lijin mill and at Jufeng. Hubei Lijin holds works approvals from eight classification societies for bulb flat steel and sections; the certificates and the scope of each are on the certifications page. Bulb flat is released with the mill test certificate for the relevant heat. See the Lijin approval certificates
How to read a mill test certificateStandards & 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 EH36 designation as the IACS classification-society rules.
General structural-steel standards such as EN 10025 (Europe) and JIS G3106 (Japan) lack classification-society approval for ship hulls and cannot replace EH36 on a classed vessel. AH36 vs A36
Quick answers
What is the lead time for EH36 plate from ZCMetals?
EH36 is rolled to order at the WISCO mill. Its -40°C impact-test requirement falls outside the standard rolling programme, so lead time is typically 45–60 days.
What certificate ships with EH36 plate?
A mill test certificate (MTC) to EN 10204 3.1, issued per heat, plus a classification society certificate copy for whichever of our nine approved societies your project requires. Independent third-party witnessed inspection (EN 10204 3.2) can be arranged on request.
What is the minimum order quantity for EH36?
Subject to the WISCO mill's minimum rolling batch for EH36, confirmed on enquiry.
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
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