Under the steel specification ASTM A 131/A 131M,marine steel plate and sheet A131 Grade DH40 and A131 Grade AH40 are mainly used for building cranes project under high strength situation in many shipyards.For the heat treatment, shipbuilding steel plate A131 Grade DH40 have to be done under TMCP or Normalized for all the thickness, and shipbuilding steel plate A131 Grade AH40 have to be done under TMCP or Normalized for the thickness above 40 millimeter,and for belows 40 millimeters,marine steel plates done under AR is Ok if the end user accept when purchase.

 

Now YUSHENG STEEL owned thousands of stock ship steel plate A131 Grade DH40 and A131 Grade AH40 in our port warehouses.For these stock steel plates,all we can offer the original mill certificates along with the plates.Please be free to contact us if you need our stock list for plate steel A131 Grade DH40 and A131 Grade AH40.

 

Mechanical properties for A131 Grade AH40 shipbuilding steel plate:

 

Yield strength (Mpa)	Tensile strength (Mpa)	Impacting Test temperature (℃)
≥390	510-650	0

 

 

 

 

 

Chemical composition of cast analysis for A131 Grade AH40 marine steel plate (Max %):

 

C	Si	Mn	P	S	Al acid	Nb
0.18	0.50	0.9/1.60	0.035	0.035	≥ 0.015	0.02/0.05
V	Ti	Ni	Cu	Cr	Mo	N
0.03/0.10	0.02	0.40	0.35	0.20	0.08	-