S355B - ISO 630-2-2011

Grade	S355B
Corresponding Standard	ISO 630-2-2011 Structural Steels - Part 2: Technical Delivery Conditions for Structrual Steels for General Purposes
Classification	Alloy Steel

S355B Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cu	N
Minimum Value	-	-	-	-	-	-	-
Maximum Value	0.24	0.55	1.6	0.035	0.035	0.55	0.012

① FN = rimming steels not permitted; FF = fully killed steel. t=nominal thickness in mm
② For sections with nominal thickness > 100 mm, the C content is by agreement.
③ For long products, the P and S content may be 0,005 % higher.
④ For long products, the max. S content may be increased for improved machinability by 0,015 % by agreement if the steel is treated to modify the sulfide morphology, and if the chemical composition shows min. 0,002 0 % Ca.
⑤ The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0,020 % or, alternatively, minimum 0,015 % acid-soluble Al or if sufficient other N-binding elements are present. In this case, the N-binding elements shall be mentioned in the inspection document.
⑥ Cu content above 0,40 % can cause hot shortness during hot forming.
⑦ If other elements are added, they shall be mentioned on the inspection document.

S355B 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	470~630	ReH: ≥355	long.: ≥22 tr.: ≥20	≥27
16＜t≤40	470~630	ReH: ≥345	long.: ≥22 tr.: ≥20	≥27
40＜t≤63	470~630	ReH: ≥335	long.: ≥21 tr.: ≥19	≥27
63＜t≤80	470~630	ReH: ≥325	long.: ≥20 tr.: ≥18	≥27
80＜t≤100	470~630	ReH: ≥315	long.: ≥20 tr.: ≥18	≥27
100＜t≤150	450~600	ReH: ≥295	long.: ≥18 tr.: ≥18	≥27
150＜t≤200	450~600	ReH: ≥285	long.: ≥17 tr.: ≥17	≥27
200＜t≤250	450~600	ReH: ≥275	long.: ≥17 tr.: ≥17	≥27

S355B Corresponding Standards(Same grade name, different standards)

1	ISO 630-2-2011
	S355B
2	ISO 630-2-2021
	S355B

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