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牌號	S235B
對應標準	ISO 683-18-2014 熱處理鋼、合金鋼和易切削鋼 -- 第18部分：光面鋼制品 Heat-treatable Steels, Alloy Steels and Free-Cutting Steels - Part 18: Bright Steel Products
歸類	合金鋼

S235B 化學元素成分含量(%)

	成分	C	Mn	P	S ^①	Cu ^③	N ^②
t≤40mm	最小值	-	-	-	-	-	-
t≤40mm	最大值	0.17	1.4	0.04	0.04	0.55	0.012

	成分	C	Mn	P	S ^①	Cu ^③	N ^②
40mm＜t≤100mm	最小值	-	-	-	-	-	-
40mm＜t≤100mm	最大值	0.2	1.4	0.04	0.04	0.55	0.012

① For long products. the max. S content may be increased for improved machinablility ba 0,005 % by agreement if the steel is treated to modify the sulphide morphology and if the chemical composition shows min 0,0020 % Ca.
② The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0,020 % or, alternalively, minimum 0,015 % acid soluble Al or if s ufficient other N-binding elements are present. In this case, the N-binding elements shall be mentioned in the inspection document.
③ Cu contenl above 0,40 % can cause hot shortness during hot forming.

碳當量計算

S235B 機械性能

厚度 t mm	熱處理或狀態	抗拉強度 σ_b Mpa	屈服點 σ_s Mpa	斷后伸長率或延伸率 δ %	硬度 HBW
5≤t≤10	Cold drawn (+C)	470~840	≥355	≥8
10＜t≤16	Cold drawn (+C)	420~770	≥300	≥9
16＜t≤40	Cold drawn (+C)	390~730	≥260	≥10
40＜t≤63	Cold drawn (+C)	380~670	≥235	≥11
63＜t≤100	Cold drawn (+C)	360~640	≥215	≥11
16＜t≤100	As-rolled + peeled (+SH)	360~510			107~152

近似對照表碳素結構鋼和工程用鋼

中國	國際標準組織	歐標
GB	ISO	EN	數字牌號
Q235B	S235B	S235JRC	1.0122

注：數據僅供參考！如有疑問，請填寫"我要糾錯"！

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