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IS 6603 X15Cr18Ni8 vs BS 970 (Part 1) 303S31

Close Alternative — 79.7% match based on chemical composition and mechanical property overlap.

IS 6603 X15Cr18Ni8 (IS 6603:2024) and BS 970 (Part 1) 303S31 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Stainless Steel category. IS 6603 X15Cr18Ni8 is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while BS 970 (Part 1) 303S31 is commonly used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition).. IS 6603 X15Cr18Ni8 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 303S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 6603 X15Cr18Ni8 vs BS 970 (Part 1) 303S31 is a 79.7% 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 79.7%.

Frequently Compared With IS 6603 X15Cr18Ni8:
GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH
Match Breakdown
CHEMISTRY MATCH
79.7%
MECHANICAL MATCH
No shared data
OVERALL
79.7%
Specifications
Property IS 6603 X15Cr18Ni8 BS 970 (Part 1) 303S31
Standard IS 6603:2024 BS 970 (Part 1):1983
Category Stainless Steel Stainless Steel
C (%) <=0.15 <=0.12
Si (%) <=2.00 <=1.0
Mn (%) <=2.00 <=2.0
P (%) <=0.045 <=0.060
S (%) <=0.030 0.15-0.35
Cr (%) 16.0-19.0 17.0-19.0
Mo (%) <=0.80 <=1.00
Ni (%) 6.0-9.5 8.0-10.0
N (%) <=0.10 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 X15Cr18Ni8 BS 970 (Part 1) 303S31
Tensile Strength 500-700 MPa Not specified
Condition Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, rod only; Yield Strength is Rp0.2, Elongation is A (longitudinal) Not specified
Typical Applications
IS 6603 X15Cr18Ni8
General purposes, semi-finished products, bars, wire rods and bright bars
BS 970 (Part 1) 303S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
Key Differences
Can IS 6603 X15Cr18Ni8 Be Substituted With BS 970 (Part 1) 303S31?
IS 6603 X15Cr18Ni8 and BS 970 (Part 1) 303S31 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
IS 6603 X15Cr18Ni8
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BS 970 (Part 1) 303S31
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Frequently Asked Questions
What is the difference between IS 6603 X15Cr18Ni8 and BS 970 (Part 1) 303S31?
IS 6603 X15Cr18Ni8 specifies N which is not specified for BS 970 (Part 1) 303S31.
Can IS 6603 X15Cr18Ni8 be substituted with BS 970 (Part 1) 303S31?
IS 6603 X15Cr18Ni8 and BS 970 (Part 1) 303S31 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.