С550 S550 - GOST 27772-2015

Grade	С550
Other Names
Corresponding Standard	GOST 27772-2015 Rolled Metal for Steel Building Structures
Classification	Alloy Steel

С550 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	Ti	V	Nb	Al	More
Minimum Value	-	0.15	1.3	-	-	-	0.15	-	-	0.01	-	0.03	0.02	V+Nb≤0.12
Maximum Value	0.1	0.35	1.95	0.015	0.007	0.3	0.35	0.3	0.35	0.035	0.1	0.1	0.06	V+Nb≤0.12

С550 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
8≤t≤50	≥640	≥540	≥17	-40°C、-60°C: KCV≥66J/cm2

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!