Steel Plate GY4,28Cr2Mo

GY4,28Cr2Mo Scope The technical conditions apply to plates of GY4, 28Cr2Mowith thickness not more than 150mm. (8mm-150mm)
Thickness tolerance: +/-1.52mm
Flatness: 4mm/m
Surface shot blasting or peeled.
Technical conditions Chemical composition (Ladle analysis)Grain size Grain size for plates shall be according to GY4,28Cr2Mo Surface quality The surface quality of plates shall be accordance with ASTM A6/A6M.
The third party inspection:
Delivery conditions The delivery conditions for plates of GY4,28Cr2Moshall be high temperature tempering. Other requirements MTC accordance with EN10204: 2004 3.1 Parameter The chemical composition of plates shall be accordance with the following table 1. Table 1 Chemical composition (Ladle analysis)

C	Si	Mn	P	S	Cr	Ni	Mo
0.23-0329	1.20-1.60	1.20-1.60	Max0.030	Max0.030	Max0.30	Max0.50	0.15-0.25

Note: Per furnace analysis [N] not more than 80ppm, [O] not more than 30ppm. Steel making process: EAF+LF/VD Carbon equivalent (CEq) Carbon equivalent shall be not more than 0.76 for plates of GY4,28Cr2Mo. Carbon equivalent shall be calculated as follows: CEq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 (%) inspecton of quality conformity

No	test item	sample quantity	sampling location	Request Chapter No.	test method chapter No
1	chemical	1(every bolier)	GB222	3.2	4.3.1
2	impact test	4	4.2.2.2	3.4	4.3.2
3	hardness	2-3	4.2.2.3	3.4	4.3.3
4	Fracture	2	4.2.2.4	3.5	4.3.4
5	UT test	each	entire	3.6	4.3.5
6	Size,surface	each	entire	3.7	4.3.6
7	appearancequality	each	entire	3.8	4.3.7
8	ballisticperformance	1-2	4.2.2.5	3.9	4.3.8

Related steel grade:

603	GY4	GY5	675
30CrMnMoRE	28Cr2Mo	26SiMnMo	30CrNi3MoV