420S29 - BS 970-3-1991

Grade	420S29
Corresponding Standard	BS 970-3-1991 Specification for wrought steel for machanical and allied engineering purposes part 3:bright bars for general engineering purposes
Classification	Martensitic Stainless Steel

420S29 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu ^*	Mo ^*
Minimum Value	0.14	-	-	-	-	11.5	-	-	-
Maximum Value	0.2	1	1	0.04	0.03	13.5	1	0.3	0.3

• For older grades of stainless steel, see Table 2 of standard BS 970-4-1970

420S29 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW	Impact Energy Absorption KV2 J
d≤150	R	700~850	≥525	≥15	201~255	d＜63: Izod ≥34 d≥63: Izod ≥27
d≤29	S	775~925	≥585	≥13	223~277	-
Rod	Heat Treatment 950~1020°C, Oil or Air Cooling				Softening ≤217

1 Approximate Comparison Table Martensitic Stainless Steel

2 Approximate Comparison Table Martensitic Heat-Resistant Steel

China		Taiwan, China	Japan	South Korea	International Organization for Standardization	Germany		United Kingdom
GB	ISC	CNS	JIS	KS	ISO	DIN EN/DIN	W-Nr.	BS EN/BS
13Cr13Mo (1Cr13Mo)	S45710	410J1	SUS 410J1	STS 410J1	X12CrMo 12-6	X15Cr 13	1.4024	420S29

3 Approximate Comparison Table Martensitic Heat-Resistant Steel

420S29 Corresponding Standards(Same grade name, different standards)

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