Other Steels – Plate for Shipbuilding

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DH36 quality steel plate from Oakley Steel

Steel plates to ASTM A131 for shipbuilding are available from Oakley Steel. A131 covers a number of different grades – some are ordinary strength A, B, D, CS and E, whilst others are higher strength – AH, DH, EH and FH. Oakley Steel supplies AH36, DH36 and EH36 which are chemically similar but which are tested as different temperatures for the Charpy V–Notch test.

Our steel plates are suitable for container and bulk cargo vessels as well as cruise ships, ferries and yachts.

The standard composition is as below for AH36, DH36 and EH36:

Element	% Composition
C	0.18
Mn	0.90 – 1.60
Si	0.1 – 0.5
P	0.035
S	0.035
Al	0.015
Nb	0.02 – 0.05
V	0.05 – 0.1
Ti	0.02
Cu	0.35
Cr	0.2
Ni	0.4
Mo	0.08

Maximum carbon equivalent values are 0.38 for plates less than 50mm thick and 0.4 for plates between 50mm and 100mm thick.

	AH36	DH36	EH36
Tensile Strength (ksi	71 – 90	71 – 90	71 – 90
Tensile Strength (MPa)	490 – 620	490 – 620	490 – 620
Yield Point (ksi)	51	51	51
Yield Point (MPa)	355	355	355
Elongation in 200mm (%)	19	19	19
Elongation in 50mm (%)	22	22	22
Charpy V-Notch Test Temperature	0°C	-20°C	-40°C