С345 S345 - GOST 27772-2015 - H2ABC

中文版

Grade	С345
Other Names
Corresponding Standard	GOST 27772-2015 Rolled Metal for Steel Building Structures
Classification	Alloy Steel

С345 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Ti	V	Nb	Al
Minimum Value	-	-	1.3	-	-	-	-	-	-	-	-	0.015
Maximum Value	0.15	0.8	1.7	0.03	0.025	0.3	0.3	0.3	0.035	0.08	0.06	0.06

С345 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
2≤t≤3.9	≥490	≥345	≥21
4≤t≤10	≥490	≥345	≥21	+20°C: KCU≥29J/cm2(after mechanical ageing) -20°C: KCV≥34J/cm2 -40°C: KCU≥39J/cm2 KCV≥34J/cm2 -70°C: KCU≥34J/cm2
10＜t≤20	≥470	≥325	≥21	+20°C: KCU≥29J/cm2(after mechanical ageing) -20°C: KCV≥34J/cm2 -40°C: KCU≥34J/cm2 KCV≥34J/cm2 -70°C: KCU≥29J/cm2
20＜t≤40	≥460	≥305	≥21	+20°C: KCU≥29J/cm2(after mechanical ageing) -20°C: KCV≥34J/cm2 -40°C: KCU≥34J/cm2 KCV≥34J/cm2 -70°C: KCU≥29J/cm2
40＜t≤60	≥450	≥285	≥21	+20°C: KCU≥29J/cm2(after mechanical ageing) -20°C: KCV≥34J/cm2 -40°C: KCU≥34J/cm2 KCV≥34J/cm2 -70°C: KCU≥29J/cm2
60＜t≤80	≥440	≥275	≥21	+20°C: KCU≥29J/cm2(after mechanical ageing) -20°C: KCV≥34J/cm2 -40°C: KCU≥34J/cm2 KCV≥34J/cm2 -70°C: KCU≥29J/cm2
80＜t≤160	≥430	≥265	≥21	+20°C: KCU≥29J/cm2(after mechanical ageing) -20°C: KCV≥34J/cm2 -40°C: KCU≥34J/cm2 KCV≥34J/cm2 -70°C: KCU≥29J/cm2

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