Strong Match — 100% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 431S29 (BS 970 (Part 1):1991) and BS 970 (Part 3) 431S29 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 1) 431S29 is typically used for ferritic and martensitic stainless and heat resisting steel (section five), while BS 970 (Part 3) 431S29 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).
BS 970 (Part 1) 431S29 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 431S29 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, BS 970 (Part 1) 431S29 vs BS 970 (Part 3) 431S29 is a 100% 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 100%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
BS 970 (Part 1) 431S29
Ferritic and martensitic stainless and heat resisting steel (section five)
BS 970 (Part 3) 431S29
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
Can BS 970 (Part 1) 431S29 Be Substituted With BS 970 (Part 3) 431S29?
BS 970 (Part 1) 431S29 and BS 970 (Part 3) 431S29 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 431S29 is often considered as a substitute for BS 970 (Part 1) 431S29 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 BS 970 (Part 1) 431S29 and BS 970 (Part 3) 431S29?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 431S29 be substituted with BS 970 (Part 3) 431S29?
BS 970 (Part 1) 431S29 and BS 970 (Part 3) 431S29 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 431S29 is often considered as a substitute for BS 970 (Part 1) 431S29 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.