Q345KZB - GB /T 34560.6-2017

Grade	Q345KZB
Corresponding Standard	GB /T 34560.6-2017 Structural Steels - Part 6: Technical Delivery Conditions for Seismic-Improved Structural Steels for Building
Classification	Alloy Steel

Q345KZB Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S ^①	Cr	Ni	Cu	Mo	More
Minimum Value	-	-	0.5	-	-	-	-	-	-	Nb+V+Ti ≤ 0.15
Maximum Value	0.23	0.55	1.65	0.03	0.045	0.35	0.45	0.6	0.15	Nb+V+Ti ≤ 0.15

Q345KZB Mechanical Properties

Nominal thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
6≤t≤150	345~450	ReH: ≥450	≥19	≥47（冲击温度 20℃）

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