ASTM A131 AH36 steel plate

ASTM A131 AH36 is a structural-grade steel exclusively used for shipbuilding and offshore engineering industries. Classified as high-strength marine steel, it features a specified minimum yield strength of 51 KSI (355 MPa).

All thickness specifications of ASTM A131 AH36 steel plate are acceptable in as-rolled delivery condition. In addition, ASTM A131 AH36 shipbuilding steel plates shall undergo Charpy V-notch impact tests at 0°C.

1. Chemical Composition

The maximum and range limits of chemical composition (mass fraction %) for ASTM A131 AH36 high-strength steel are listed in the table below:

A131 AH36 high Strength Chemical Composition
Grade	The Element Max (%)
	C	Si	Mn	P	S	Al	N
A131 AH36	0.18	0.1-0.50	0.90-1.6	0.035	0.035	>0.015	-
	Nb	V	Ti (Max)	Cu (Max)	Cr (Max)	Ni (Max)	Mo (Max)
	0.02-0.05	0.05-0.10	0.02	0.35	0.20	0.40	0.08

2. Mechanical Properties

The room-temperature mechanical properties and 0°C Charpy V-notch impact test parameters of ASTM A131 AH36 high-strength steel are specified as follows:

Grade		Mechanical Property			Charpy V Impact Test
	Thickness	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
A131 AH36	mm	Min Mpa	Mpa	Min  %	0	J	J
	t≤50	355	490-620	22%		34	24
	50＜t≤70	355	490-620	22%
	70＜t≤100	355	490-620	22%
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

3. Applications

With a minimum yield strength of 355 MPa, ASTM A131 AH36 shipbuilding steel plate features high strength, excellent toughness and superior adaptability to marine environments. It is widely applied in ship manufacturing, offshore oil platforms and various marine engineering structural projects.