Strong Match — 94.7% match
based on chemical composition and mechanical property overlap.
IS 6603 X04Cr18Ni10Nb (IS 6603:2024) and BS 970 (Part 1) 347S31 (BS 970 (Part 1):1983) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X04Cr18Ni10Nb is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while BS 970 (Part 1) 347S31 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 X04Cr18Ni10Nb is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 347S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 6603 X04Cr18Ni10Nb vs BS 970 (Part 1) 347S31 is a 94.7% 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 94.7%.
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 X04Cr18Ni10Nb
BS 970 (Part 1) 347S31
Tensile Strength
510-740 MPa
Not specified
Yield Strength
>=205 MPa
Not specified
Elongation
>=40%
Not specified
Condition
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 160 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal)
Not specified
Typical Applications
IS 6603 X04Cr18Ni10Nb
General purposes, semi-finished products, bars, wire rods and bright bars
BS 970 (Part 1) 347S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
Can IS 6603 X04Cr18Ni10Nb Be Substituted With BS 970 (Part 1) 347S31?
IS 6603 X04Cr18Ni10Nb and BS 970 (Part 1) 347S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 347S31 is often considered as a substitute for IS 6603 X04Cr18Ni10Nb in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between IS 6603 X04Cr18Ni10Nb and BS 970 (Part 1) 347S31?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6603 X04Cr18Ni10Nb be substituted with BS 970 (Part 1) 347S31?
IS 6603 X04Cr18Ni10Nb and BS 970 (Part 1) 347S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 347S31 is often considered as a substitute for IS 6603 X04Cr18Ni10Nb in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.