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IS 6603 X04Cr12Nb vs BS 970 (Part 1) 416S21

Close Alternative — 70.1% match based on chemical composition and mechanical property overlap.

IS 6603 X04Cr12Nb (IS 6603:2024) and BS 970 (Part 1) 416S21 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Stainless Steel category. IS 6603 X04Cr12Nb is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while BS 970 (Part 1) 416S21 is commonly used for ferritic and martensitic stainless and heat resisting steel (section five). IS 6603 X04Cr12Nb is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 416S21 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 6603 X04Cr12Nb vs BS 970 (Part 1) 416S21 is a 70.1% 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 70.1%.

Frequently Compared With IS 6603 X04Cr12Nb:
ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo
Match Breakdown
CHEMISTRY MATCH
70.1%
MECHANICAL MATCH
No shared data
OVERALL
70.1%
Specifications
Property IS 6603 X04Cr12Nb BS 970 (Part 1) 416S21
Standard IS 6603:2024 BS 970 (Part 1):1991
Category Stainless Steel Stainless Steel
C (%) <=0.08 0.09-0.15
Si (%) <=1.00 <=1.0
Mn (%) <=0.80 <=1.5
P (%) <=0.04 <=0.060
S (%) <=0.03 0.15-0.35
Cr (%) 10.5-13.5 11.5-13.5
Mo (%) <=0.50 <=0.60
Ni (%) <=0.60 <=1.00
Cu (%) <=0.75 Not specified
Nb (%) <=0.75 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 6603 X04Cr12Nb BS 970 (Part 1) 416S21
Tensile Strength >=380 MPa Not specified
Yield Strength >=170 MPa Not specified
Elongation >=20% Not specified
Hardness <=179 HB Not specified
Condition Annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 100 mm; Tensile Strength is a minimum as printed Not specified
Typical Applications
IS 6603 X04Cr12Nb
General purposes, semi-finished products, bars, wire rods and bright bars
BS 970 (Part 1) 416S21
Ferritic and martensitic stainless and heat resisting steel (section five)
Key Differences
Can IS 6603 X04Cr12Nb Be Substituted With BS 970 (Part 1) 416S21?
IS 6603 X04Cr12Nb and BS 970 (Part 1) 416S21 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.
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IS 6603 X04Cr12Nb
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BS 970 (Part 1) 416S21
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Frequently Asked Questions
What is the difference between IS 6603 X04Cr12Nb and BS 970 (Part 1) 416S21?
IS 6603 X04Cr12Nb specifies Cu, Nb which are not specified for BS 970 (Part 1) 416S21.
Can IS 6603 X04Cr12Nb be substituted with BS 970 (Part 1) 416S21?
IS 6603 X04Cr12Nb and BS 970 (Part 1) 416S21 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.