Related Material — 69.9% match
based on chemical composition and mechanical property overlap.
JIS G3506 SWRH77B (JIS G3506:2004) and BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Carbon Steel category.
JIS G3506 SWRH77B is typically used for high-carbon hard-drawn steel wire rod (sw-c class, 0.80% c); used for hard-drawn steel wire, oil-tempered wire, prestressed concrete (pc) wire/strand, galvanized wire strands, wire rope, springs, tire bead wire, while BS 970 (Part 1) 040A12 is commonly used for as-rolled, or as-rolled and softened, steel (section two).
JIS G3506 SWRH77B is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, JIS G3506 SWRH77B vs BS 970 (Part 1) 040A12 is a 77.7% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a related material overall at 69.9%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
JIS G3506 SWRH77B
High-carbon hard-drawn steel wire rod (SW-C class, 0.80% C); used for hard-drawn steel wire, oil-tempered wire, prestressed concrete (PC) wire/strand, galvanized wire strands, wire rope, springs, tire bead wire
BS 970 (Part 1) 040A12
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
JIS G3506 SWRH77B specifies Si, P, S which are not specified for BS 970 (Part 1) 040A12.
Can JIS G3506 SWRH77B Be Substituted With BS 970 (Part 1) 040A12?
JIS G3506 SWRH77B and BS 970 (Part 1) 040A12 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 JIS G3506 SWRH77B and BS 970 (Part 1) 040A12?
JIS G3506 SWRH77B specifies Si, P, S which are not specified for BS 970 (Part 1) 040A12.
Can JIS G3506 SWRH77B be substituted with BS 970 (Part 1) 040A12?
JIS G3506 SWRH77B and BS 970 (Part 1) 040A12 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.