Close Alternative — 75% match
based on chemical composition and mechanical property overlap.
IS 6911 X30Cr13 (IS 6911:1992) and BS 970 (Part 1) 431S29 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Stainless Steel category.
IS 6911 X30Cr13 is typically used for stainless and heat-resisting steel plate, sheet and strip (clause 1.1), while BS 970 (Part 1) 431S29 is commonly used for ferritic and martensitic stainless and heat resisting steel (section five).
IS 6911 X30Cr13 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 431S29 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 6911 X30Cr13 vs BS 970 (Part 1) 431S29 is a 75% 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 75%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 6911 X30Cr13
BS 970 (Part 1) 431S29
Elongation (50 mm, annealed)
>=11%
Not specified
Hardness (annealed, max)
235 HBS
Not specified
Hardness (quenched and tempered, min)
500 HV, 49 HRC
Not specified
Tensile Strength (annealed)
>=780 MPa
Not specified
Yield Strength (0.2% proof, annealed)
>=590 MPa
Not specified
Typical Applications
IS 6911 X30Cr13
Stainless and heat-resisting steel plate, sheet and strip (clause 1.1)
BS 970 (Part 1) 431S29
Ferritic and martensitic stainless and heat resisting steel (section five)
Can IS 6911 X30Cr13 Be Substituted With BS 970 (Part 1) 431S29?
IS 6911 X30Cr13 and BS 970 (Part 1) 431S29 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.
What is the difference between IS 6911 X30Cr13 and BS 970 (Part 1) 431S29?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6911 X30Cr13 be substituted with BS 970 (Part 1) 431S29?
IS 6911 X30Cr13 and BS 970 (Part 1) 431S29 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.