Close Alternative — 83.8% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 905M39 (BS 970 (Part 1):1991) and BS 970 (Part 1) 708M40 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Alloy Steel category.
BS 970 (Part 1) 905M39 is typically used for steel for surface hardening by nitriding (section three), while BS 970 (Part 1) 708M40 is commonly used for used for axles, gears, shafts, studs, crankshafts, and heavy-duty machinery parts..
BS 970 (Part 1) 905M39 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 708M40 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, BS 970 (Part 1) 905M39 vs BS 970 (Part 1) 708M40 is a 83.8% 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 83.8%.
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) 905M39
Steel for surface hardening by nitriding (section three)
BS 970 (Part 1) 708M40
Used for axles, gears, shafts, studs, crankshafts, and heavy-duty machinery parts.
Can BS 970 (Part 1) 905M39 Be Substituted With BS 970 (Part 1) 708M40?
BS 970 (Part 1) 905M39 and BS 970 (Part 1) 708M40 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 BS 970 (Part 1) 905M39 and BS 970 (Part 1) 708M40?
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) 905M39 be substituted with BS 970 (Part 1) 708M40?
BS 970 (Part 1) 905M39 and BS 970 (Part 1) 708M40 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.