Q370qC - GB /T 714-2025

Grade	Q370qC
Corresponding Standard	GB /T 714-2025 Structural Steel for Bridge
Classification	Alloy Steel

Q370qC Chemical Element Composition Content (%)

	Component	C	Si	Mn	P	S	Cr	Ni	Cu	N	Ti ^①	V ^①	Nb ^①	B ^④	Al ^①②	H ^④
正火钢	Minimum Value	-	-	1	-	-	-	-	-	-	0.006	0.01	0.005	-	0.01	-
正火钢	Maximum Value	0.18	0.55	1.6	0.03	0.025	0.3	0.3	0.3	0.008	0.03	0.08	0.06	0.0005	0.045	0.0002

	Component	C	Si	Mn ^③	P	S	Cr	Ni	Cu	N	Ti ^①	V ^①	Nb ^①	B ^④	Al ^①②	H ^④
热机械轧制钢	Minimum Value	-	-	0.8	-	-	-	-	-	-	0.006	0.01	0.01	-	0.01	-
热机械轧制钢	Maximum Value	0.14	0.55	1.6	0.03	0.025	0.3	0.3	0.3	0.008	0.03	0.08	0.09	0.0005	0.045	0.0002

Q370qC Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤50	≥510	ReL ≥370	≥20	0°C t≤12 ≥80 12＜t≤100 ≥120
50＜t≤100	≥510	ReL ≥360	≥20	0°C ≥120
100＜t≤150	≥430	ReL ≥320	≥20	0°C ≥55

Q370qC Corresponding Standards(Same grade name, different standards)

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