Be used for different position.Include carcon stell,low alloy stell and stainles stell.

Item Code	Model	Chemical composition (%)(≤)						Mechanical propertise(≥)
	GB	C	Mn	Si	S	P	Other	Rel/RP0.2	Rm	A	AKV
								MPa	MPa	%	J
J421	E4313	0.1	0.32/	0.3	0.03	0.035	—	355	440/	22	0°C
			0.55						560		47
THJ421X	E4313	0.1	0.32/	0.3	0.035	0.04	—	330	420	17	0°C
			0.55								27