Q370R - GB /T 713.2-2023

Grade	Q370R
Corresponding Standard	GB /T 713.2-2023 Steel plate, sheet and strip for pressure equipments - Part 2: Non-alloy and alloy steel with specified temperature properties
Classification	Alloy Steel

Q370R Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	More
Minimum Value	-	-	1.2	-	-	-	-	-	-	-	-	0.015	Cu+Ni+Cr+Mo≤0.7
Maximum Value	0.18	0.55	1.7	0.02	0.01	0.3	0.3	0.3	0.08	0.03	0.05	0.05	Cu+Ni+Cr+Mo≤0.7

Q370R Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
6≤t≤16	Normalizing or Normalizing + Tempering	530~630	≥370	≥20	-20°C ≥47
16＜t≤36	Normalizing or Normalizing + Tempering	530~630	≥360	≥20	-20°C ≥47
36＜t≤60	Normalizing or Normalizing + Tempering	520~620	≥340	≥20	-20°C ≥47

1 Approximate Comparison Table

China	International Organization for Standardization
GB	ISO
Q370R GB/T 713-2008	HS390D ISO 4999-1999

2 Approximate Comparison Table

China	International Organization for Standardization	European Standard
GB	ISO	EN
Q370R GB/T 713.2-2023	P355NH P355N P355NL1 ISO 9328-2018	P355NH P355N P355NL1 EN 10028-2017

Q370R Corresponding Standards(Same grade name, different standards)

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