SG345B - ISO 630-2-2011 - H2ABC

中文版

Grade	SG345B
Corresponding Standard	ISO 630-2-2011 Structural Steels - Part 2: Technical Delivery Conditions for Structrual Steels for General Purposes
Classification	Alloy Steel

SG345B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	More
Minimum Value	-	-	-	-	-	-	-	-	-	-	-	-	V+Nb:≤0.15
Maximum Value	0.24	0.55	1.7	0.04	0.05	0.35	0.45	0.6	0.15	0.04	0.15	0.05	V+Nb:≤0.15

SG345B Mechanical Properties

thickness t mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
t≤16	540~695	≥345	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*	20°C: ≥27
16＜t≤40	540~695	≥335	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*	20°C: ≥27
40＜t≤100	540~695	≥325	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*	20°C: ≥27
100＜t≤200	540~695	≥315	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*	20°C: ≥27◎
t＞200	540~695	≥305	L0=5.65√S0: ≥17* L0=50mm: ≥19* L0=200mm: ≥17*	20°C: ≥27◎

SG345B Corresponding Standards(Same grade name, different standards)

1	ISO 630-2-2011
	SG345B
2	ISO 630-2-2021
	SG345B

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