S235B

2023-05-17 18:53:20 来源：钢铁之家阅读量：0

牌号	S235B
对应标准	ISO 683-18-2014 热处理钢、合金钢和易切削钢 -- 第18部分：光面钢制品 Bright steel products
归类	合金钢

S235B 化学元素成分含量(%)

	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.

碳当量计算

S235B 机械性能

厚度 t mm	热处理或状态	抗拉强度 σ_b Mpa	屈服点 σ_s Mpa	断后伸长率或延伸率 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

近似对照表碳素结构钢和工程用钢

中国	国际标准组织	欧标
GB	ISO	EN	数字牌号
Q235B	S235B	S235JRC	1.0122

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