Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
ASME SA105 (ASME BPVC.II.A-2025 SA-105/SA-105M) and BS 970 (Part 3) 070M55 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Carbon Steel category.
ASME SA105 is typically used for pressure vessel flanges, boiler fittings, valves, piping components requiring asme certification, while BS 970 (Part 3) 070M55 is commonly used for used for springs, blades, wear plates, hand tools, shafts, and cutting components..
BS 970 (Part 3) 070M55 is defined under British Standards (BS) (United Kingdom).
As per chemical composition, ASME SA105 vs BS 970 (Part 3) 070M55 is a 87.9% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Used for springs, blades, wear plates, hand tools, shafts, and cutting components.
Can ASME SA105 Be Substituted With BS 970 (Part 3) 070M55?
ASME SA105 and BS 970 (Part 3) 070M55 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
What is the difference between ASME SA105 and BS 970 (Part 3) 070M55?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASME SA105 be substituted with BS 970 (Part 3) 070M55?
ASME SA105 and BS 970 (Part 3) 070M55 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.