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IS 6603 X03Cr18Ni9Cu4 vs BS 970 (Part 3) 304S11

Strong Match — 87.2% match based on chemical composition and mechanical property overlap.

IS 6603 X03Cr18Ni9Cu4 (IS 6603:2024) and BS 970 (Part 3) 304S11 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. IS 6603 X03Cr18Ni9Cu4 is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while BS 970 (Part 3) 304S11 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (table 18). IS 6603 X03Cr18Ni9Cu4 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 3) 304S11 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 6603 X03Cr18Ni9Cu4 vs BS 970 (Part 3) 304S11 is a 87.2% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 87.2%.

Frequently Compared With IS 6603 X03Cr18Ni9Cu4:
IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH GOST 5632 08X18H10 GB/T 3280 06Cr19Ni10 IS 1570 (Part 7) 11Cr17Ni13W3TiH ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
87.2%
MECHANICAL MATCH
No shared data
OVERALL
87.2%
Specifications
Property IS 6603 X03Cr18Ni9Cu4 BS 970 (Part 3) 304S11
Standard IS 6603:2024 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.04 <=0.030
Si (%) <=1.00 <=1.0
Mn (%) <=2.00 <=2.0
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Cr (%) 17.0-19.0 17.0-19.0
Ni (%) 8.0-10.5 9.0-12.0
N (%) <=0.10 Not specified
Cu (%) 3.0-4.0 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 X03Cr18Ni9Cu4 BS 970 (Part 3) 304S11
Tensile Strength 450-650 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 X03Cr18Ni9Cu4
General purposes, semi-finished products, bars, wire rods and bright bars
BS 970 (Part 3) 304S11
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (Table 18)
Key Differences
Can IS 6603 X03Cr18Ni9Cu4 Be Substituted With BS 970 (Part 3) 304S11?
IS 6603 X03Cr18Ni9Cu4 and BS 970 (Part 3) 304S11 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 304S11 is often considered as a substitute for IS 6603 X03Cr18Ni9Cu4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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IS 6603 X03Cr18Ni9Cu4
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BS 970 (Part 3) 304S11
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Frequently Asked Questions
What is the difference between IS 6603 X03Cr18Ni9Cu4 and BS 970 (Part 3) 304S11?
IS 6603 X03Cr18Ni9Cu4 specifies N, Cu which are not specified for BS 970 (Part 3) 304S11.
Can IS 6603 X03Cr18Ni9Cu4 be substituted with BS 970 (Part 3) 304S11?
IS 6603 X03Cr18Ni9Cu4 and BS 970 (Part 3) 304S11 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 304S11 is often considered as a substitute for IS 6603 X03Cr18Ni9Cu4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.