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Grade 410S21
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
410S21 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu * Mo *
Minimum Value 0.09 - - - - 11.5 - - -
Maximum Value 0.15 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
410S21 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW 		Impact Energy Absorption
KV2
J
d≤150 P 550~700 ≥370 ≥20 152~207 d＜63: Izod ≥54
d≥63: Izod ≥34
d≤63 R 700~850 ≥525 ≥15 201~255 -
Rod Heat treatment 950~1020°C, oil or air cooling Softening
≤207
1 Approximate Comparison Table Martensitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO Numerical Grade DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
12Cr13
(1Cr13) 		S41010 410 SUS 410 STS 410 410 S41000 X12Cr 13 4006-410-00-I X10Cr 13
X12Cr 13 		1.4006
1.4006 		Z12C 13
Z10C13 		X12Cr 13 1.4006 12Х13
12KH13
15KH13L 		2302 410S21
2 Approximate Comparison Table Martensitic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
12Cr13
(1Cr13) 		S41010 410 SUS 410 STS 410 410 S41000 X12Cr 13
3
(ISO 683-13-1986) 		X10Cr 13 1.4006 Z12C 13 X12Cr 13 1.4006 12Х13 2302 410S21
410S21 Corresponding Standards(Same grade name, different standards)
1 BS 970-3-1991
410S21
2 BS 970-1-1983
410S21
3 BS 970-4-1970
410S21 (EN56A)

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