ASTM A131 EH36 Steel Plate | EH36 Ship Steel Plate

ASTM A131 EH36 steel plate, also written as A131/A131M Grade EH36, A131 Grade EH36, ASTM A131 EH 36 or simply EH36 ship steel plate, is the higher-strength, extra-low-temperature-toughness hull structural steel of the ASTM A131/A131M specification. It is the ASTM counterpart of classification-society grades such as ABS AB/EH36, LR EH36, DNV VL E36 and CCS EH36. Gangsteel, a steel plate exporter, supplies A131 EH36 plates cut to size for shipbuilding, offshore platforms and other cold-region marine structures.

In the grade name, "E" is the toughness class (Charpy V-notch test at -40°C), "H" means higher strength and "36" refers to the minimum yield strength of 355 MPa (51 ksi; historically 36 kgf/mm²). Data source: Per ASTM A131/A131M-04 (Tables 4, 5, 6 and 7). The current edition is A131/A131M-19; verify against it before ordering (for example, the -19 scope text lists the 36 grades as 51 ksi [350 MPa]).

ASTM A131 EH36 Chemical Composition (Heat Analysis)

Per ASTM A131/A131M-04, Table 4. Nb, V and Al grain-refining elements may be used singly or in combination; when used in combination the minimum content of each individual element does not apply. Carbon equivalent: Ceq = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 (%), for TMCP plate limited to 0.38% max (t ≤ 50 mm) and 0.40% max (50 < t ≤ 100 mm) per Table 5.

Product Analysis (Check Analysis)

Per ASTM A131/A131M-04 (6.1.1), when product analysis is specified, the plate shall conform to the Table 4 limits shown above (C 0.18 max, Mn 0.90-1.60, Si 0.10-0.50, P and S 0.035 max, Nb 0.02-0.05, V 0.05-0.10, Ti 0.02, Cu 0.35, Cr 0.20, Ni 0.40, Mo 0.08 max), subject to the product analysis tolerances in ASTM A6/A6M.

Mechanical Properties of A131 EH36

Per ASTM A131/A131M-04, Table 6.

Charpy V-Notch Impact Requirements (-40°C)

Per ASTM A131/A131M-04, Table 7; average of three full-size specimens, not more than one value below the average and none below 70% of it. EH36 plates are impact tested on each plate-as-rolled and are delivered normalized or TMCP.

Thickness Range and Delivery Condition

ASTM A131/A131M covers higher-strength grades such as EH36 in thicknesses up to 100 mm [4 in.]. Typical supply range is 6-100 mm thick, 1500-4000 mm wide and 6000-18000 mm long. Delivery condition is normalized (N) or thermo-mechanically controlled processed (TMCP), as required by the standard for the E-class toughness level. Optional requirements by agreement include ultrasonic testing, Z-direction (Z15/Z25/Z35) through-thickness testing and third-party inspection.

A131 EH36 Equivalent Grades

Related ASTM A131 grades: A131 EH32, A131 EH40, A131 DH36, A131 AH36, A131 FH36 and A131 Grade E. See also the ASTM A131/A131M specification overview.

FAQ about ASTM A131 EH36 Steel Plate

What is ASTM A131 EH36 steel?

It is a higher-strength hull structural steel with 355 MPa minimum yield strength and guaranteed Charpy impact toughness at -40°C, used for ship hulls and offshore structures.

What is the difference between DH36 and EH36?

Both have the same strength. DH36 is impact tested at -20°C, while EH36 is tested at -40°C, so EH36 is suited to colder service and critical hull areas.

Is A131 EH36 the same as ABS EH36?

The requirements are essentially harmonized, but ABS EH36 carries ABS class certification and survey. A plate can be dual-certified to ASTM A131 and ABS AB/EH36.

What does EH36 stand for?

E = impact toughness grade at -40°C, H = higher strength, 36 = 36 kgf/mm² (about 355 MPa) minimum yield strength.

What is the yield strength of EH36?

Minimum 355 MPa (51 ksi), with tensile strength of 490-620 MPa (71-90 ksi).

What is the maximum thickness of A131 EH36 plate?

ASTM A131/A131M covers higher-strength grades up to 100 mm [4 in.] thick; impact energy rises to 41 J (50-70 mm) and 50 J (70-100 mm) longitudinal at -40°C.

Is EH36 weldable?

Yes. Its low carbon and controlled carbon equivalent give good weldability; preheat may be required for thick sections depending on Ceq and restraint.

What heat treatment is required for EH36?

EH36 is supplied normalized or thermo-mechanically controlled processed (TMCP); as-rolled delivery is not permitted for the E toughness class.

Other ASTM A131 Grades

ASTM A131 Grade A steel plate | ASTM A131 Grade B steel plate | ASTM A131 Grade D steel plate | ASTM A131 Grade E steel plate | ASTM A131 AH32 steel plate | ASTM A131 AH36 steel plate | ASTM A131 AH40 steel plate | ASTM A131 DH32 steel plate | ASTM A131 DH36 steel plate | ASTM A131 DH40 steel plate | ASTM A131 EH32 steel plate | ASTM A131 EH40 steel plate | ASTM A131 FH32 steel plate | ASTM A131 FH36 steel plate | ASTM A131 FH40 steel plate

Equivalent Class Society Grades

ASTM A131 EH36 corresponds to the same grade under the IACS member classification societies: CCS EH36 steel plate, ABS EH36 steel plate, LR EH36 steel plate.