420C28 - BS 3100-1991

牌号	420C28
对应标准	BS 3100-1991 一般工程用铸钢件 Specification for Steel castings for general engineering purposes
归类	铸钢
性能	耐腐蚀
标签	不锈钢铸钢

420C28 化学元素成分含量(%)

成分	C	Si	Mn	P	S	Cr	Ni	Cu ^①
最小值	-	-	-	-	-	11.5	-	-
最大值	0.2	1	1	0.04	0.04	13.5	1	0.3

①残余元素

碳当量计算

420C28 机械性能

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 %
AH+T或OQ+T(T at 750°C max)	≥620	≥450	≥13

A=for anneal by heating to a temperature above the AC3 and cool in the furnace
N=for normalize by heating to a temperature above the AC3 and cool in still air
OQ=for quench into oil from a temperature above the AC3
WQ=for quench into water from a temperature above the AC3
AH=for air harden by heating to a temperature above the AC3 and cool in air at a rate fast enough to produce a hardened microstructure
T=for temper by heating to a temperature below AC1
ST=for solution treat by heating to temperature high enough to dissolve and any intermetallic phases followed by a rapid cool.

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