Brief introduction of Q420GJC-Z35 steel plate

Q420GJC-Z35 steel plate is low alloy high strength construction steel, which belongs to steel plate for building structure, referred to as high construction steel. Q420GJC steel plate is suitable for manufacturing high-rise building structures, long-span structures and other important building structures with steel plate thickness of 8-100mm.

Mechanical properties of Q420GJC-Z35 steel plate:

Thickness	Mechanical properties
6-16mm	ReH(MPa)	≥420
	Rm(MPa)	520-680
	A(%)	≥19
	Impact temperature(℃)	0
	Akv(J)	≥34	Longitudinal
	Bending diameter	2a
	Bending angle(℃)	180
	Remark	ReH/Rm≤0.85；Delivery status: hot rolled, normalized, normalized rolled, normalized + tempered, TMCP
>16-35mm	ReH(MPa)	420-550
	Rm(MPa)	520-680
	A(%)	≥19
	Impact temperature(℃)	0
	Akv(J)	≥34	Longitudinal
	Bending diameter	3a
	Bending angle(℃)	180
	Remark	ReH/Rm≤0.85；Delivery status: hot rolled, normalized, normalized rolled, normalized + tempered, TMCP
>35-50mm	ReH(MPa)	410-540
	Rm(MPa)	520-680
	A(%)	≥19
	Impact temperature(℃)	0
	Akv(J)	≥34	Longitudinal
	Bending diameter	3a
	Bending angle(℃)	180
	Remark	ReH/Rm≤0.85；Delivery status: hot rolled, normalized, normalized rolled, normalized + tempered, TMCP
>50-100mm	ReH(MPa)	400-530
	Rm(MPa)	520-680
	A(%)	≥19
	Impact temperature(℃)	0
	Akv(J)	≥34	Longitudinal
	Bending diameter	3a
	Bending angle(℃)	180
	Remark	ReH/Rm≤0.85；Delivery status: hot rolled, normalized, normalized rolled, normalized + tempered, TMCP

Q420GJC-Z35 steel plate chemical elements, finished product melting analysis:

C	Si	Mn	P	S	Ni
≤0.2	≤0.55	≤1.6	≤0.025	≤0.015	≤0.7
Cr	Cu	Nb	V	Ti	Als
≤0.4	≤0.3	0.015-0.06	0.02-0.2	0.010-0.03	≥0.015

Remarks for composition: Cu is a residual element; Als can be replaced by Alt, at this time Alt≥0.02; In order to improve the performance, one or several alloying elements of Nb, V and Ti can be added as needed; V+Ti+Nb≤0.22. Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15 +V/10+5B