441S29 - BS 970-4-1970

Grade	441S29
Corresponding Standard	BS 970-4-1970 Specification for Wrought steels in the form of blooms,billets,bars and forgings--Part 4:Valve steels
Classification	Martensitic Stainless Steel

441S29 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^◎	Mo
Minimum Value	0.12	-	-	-	0.15	15	2	-	-
Maximum Value	0.2	1	1.5	0.04	0.3	18	3	0.3	0.6

441S29 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Specified Plastic Yield Strength Rp_0.2 Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
Steel, section≤63.5mm	Hardened + tempered (T)	853~1000	≥617	≥676	≥8	248~302	Izod: ≥15ft·lbf

• The letters P, R, S and T in the table indicate the range of tensile strength of quenched and tempered steels.

• When supplied in the softened condition the hardness shall be 277 HB max.
• Harden in oil or air from a temperature of 950~1020°C; Temper at a suitable temperature between 550°C and 650°C。

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