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BS 970 (Part 3) 416S21 vs IS 1570 (Part 7) 12Cr12MoH

Close Alternative — 80.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 416S21 (BS 970 (Part 3):1991) and IS 1570 (Part 7) 12Cr12MoH (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 3) 416S21 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (table 17), while IS 1570 (Part 7) 12Cr12MoH is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature. BS 970 (Part 3) 416S21 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 7) 12Cr12MoH is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, BS 970 (Part 3) 416S21 vs IS 1570 (Part 7) 12Cr12MoH is a 80.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 80.3%.

Frequently Compared With BS 970 (Part 3) 416S21:
IS 1570 (Part 7) 12Cr12MoVH EN 10088-1 1.4845 GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4301 IS 1570 (Part 7) 12Cr13H ASTM A959 .- GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12Ni2Mo
Match Breakdown
CHEMISTRY MATCH
80.3%
MECHANICAL MATCH
No shared data
OVERALL
80.3%
Specifications
Property BS 970 (Part 3) 416S21 IS 1570 (Part 7) 12Cr12MoH
Standard BS 970 (Part 3):1991 IS 1570 (Part 7):1992
Category Stainless Steel Stainless Steel
C (%) 0.09-0.15 0.08-0.16
Si (%) <=1.0 <=0.60
Mn (%) <=1.5 0.40-1.00
P (%) <=0.060 <=0.040
S (%) 0.15-0.35 <=0.035
Cr (%) 11.5-13.5 11.5-13.00
Mo (%) <=0.60 0.40-0.80
Ni (%) <=1.00 <=1.0
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 3) 416S21 IS 1570 (Part 7) 12Cr12MoH
Tensile Strength Not specified 680-880 MPa
Yield Strength Not specified >=490 MPa (0.2 % proof stress)
Elongation Not specified >=20%
Condition Not specified Bars, forgings, Q+T, thickness up to 75 (first row of Table 3)
Typical Applications
BS 970 (Part 3) 416S21
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
IS 1570 (Part 7) 12Cr12MoH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Can BS 970 (Part 3) 416S21 Be Substituted With IS 1570 (Part 7) 12Cr12MoH?
BS 970 (Part 3) 416S21 and IS 1570 (Part 7) 12Cr12MoH are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
BS 970 (Part 3) 416S21
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IS 1570 (Part 7) 12Cr12MoH
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Frequently Asked Questions
What is the difference between BS 970 (Part 3) 416S21 and IS 1570 (Part 7) 12Cr12MoH?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 416S21 be substituted with IS 1570 (Part 7) 12Cr12MoH?
BS 970 (Part 3) 416S21 and IS 1570 (Part 7) 12Cr12MoH are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.