S355D - ISO 630-2-2021

Grade	S355D
Corresponding Standard	ISO 630-2-2021 Structural Steels - Part 2: Technical Delivery Conditions for Structrual Steels for General Purposes
Classification	Alloy Steel

S355D Chemical Element Composition Content (%)

	Component	C ^*	Si	Mn	P	S	Cu
t≤40	Minimum Value	-	-	-	-	-	-
t≤40	Maximum Value	0.2	0.55	1.6	0.025	0.025	0.55

	Component	C	Si	Mn	P	S	Cu
t＞40	Minimum Value	-	-	-	-	-	-
t＞40	Maximum Value	0.22	0.55	1.6	0.025	0.025	0.55

• The table shows the chemical composition of heat analysis.

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.
* For nominal thickness t＞30mm：C=0.22% max.

S355D 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	-20°C: ≥27
16＜t≤40	470~630	ReH: ≥345	long.: ≥22 tr.: ≥20	-20°C: ≥27
40＜t≤63	470~630	ReH: ≥335	long.: ≥21 tr.: ≥19	-20°C: ≥27
63＜t≤80	470~630	ReH: ≥325	long.: ≥20 tr.: ≥18	-20°C: ≥27
80＜t≤100	470~630	ReH: ≥315	long.: ≥20 tr.: ≥18	-20°C: ≥27
100＜t≤150	450~600	ReH: ≥295	long.: ≥18 tr.: ≥18	-20°C: ≥27
150＜t≤200	450~600	ReH: ≥285	long.: ≥17 tr.: ≥17	-20°C: ≥27
200＜t≤250	450~600	ReH: ≥275	long.: ≥17 tr.: ≥17	-20°C: ≥27
250＜t≤400*	450~600	ReH: ≥265	long.: ≥17 tr.: ≥17	-20°C: ≥27

Approximate Comparison Table Carbon Structural Steel and Engineering Steel

China	International Organization for Standardization	Germany	European Standard		United Kingdom
GB	ISO	DIN EN/DIN	EN	Numerical Grade	BS EN/BS
Q345D	S355D	St52-3N	S355J2C	1.0579	50D8

S355D Corresponding Standards(Same grade name, different standards)

1	ISO 630-2-2011
	S355D
2	ISO 683-18-2014
	S355D
3	ISO 630-2-2021
	S355D

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