Strong Match — 92.4% match
based on chemical composition and mechanical property overlap.
IS 6911 X12Cr12 (IS 6911:1992) and BS 970 (Part 3) 420S29 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Stainless Steel category.
IS 6911 X12Cr12 is typically used for stainless and heat-resisting steel plate, sheet and strip (clause 1.1), while BS 970 (Part 3) 420S29 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (table 17).
IS 6911 X12Cr12 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 3) 420S29 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 6911 X12Cr12 vs BS 970 (Part 3) 420S29 is a 92.4% 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 92.4%.
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 X12Cr12
BS 970 (Part 3) 420S29
Elongation (50 mm, annealed)
>=16%
Not specified
Hardness (annealed, max)
212 HBS, 95 HRB
Not specified
Tensile Strength (annealed)
>=590 MPa
Not specified
Yield Strength (0.2% proof, annealed)
>=410 MPa
Not specified
Typical Applications
IS 6911 X12Cr12
Stainless and heat-resisting steel plate, sheet and strip (clause 1.1)
BS 970 (Part 3) 420S29
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
Can IS 6911 X12Cr12 Be Substituted With BS 970 (Part 3) 420S29?
IS 6911 X12Cr12 and BS 970 (Part 3) 420S29 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 420S29 is often considered as a substitute for IS 6911 X12Cr12 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 6911 X12Cr12 and BS 970 (Part 3) 420S29?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6911 X12Cr12 be substituted with BS 970 (Part 3) 420S29?
IS 6911 X12Cr12 and BS 970 (Part 3) 420S29 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 420S29 is often considered as a substitute for IS 6911 X12Cr12 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.