Strong Match — 87.9% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 590A15 (BS 970 (Part 1):1991) and GB/T 3077 20CrMn (GB/T 3077:2015) are both steel grades.
Both fall under the Alloy Steel category.
BS 970 (Part 1) 590A15 is typically used for case hardening steel (section four), while GB/T 3077 20CrMn is commonly used for hot-rolled or forged structural alloy steel bars.
BS 970 (Part 1) 590A15 is defined under British Standards (BS), originating from United Kingdom, while GB/T 3077 20CrMn is defined under Guobiao Standards (GB/T), originating from China.
As per chemical composition, BS 970 (Part 1) 590A15 vs GB/T 3077 20CrMn is a 81.9% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 87.9%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
BS 970 (Part 1) 590A15
GB/T 3077 20CrMn
Condition
Case hardened, 19 mm test bar
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Tensile Strength
930 MPa min
>=930 MPa
Elongation
10 % min
>=10%
Yield Strength
Not specified
>=735 MPa
Hardness
Not specified
<=187 HB
Typical Applications
BS 970 (Part 1) 590A15
Case hardening steel (section four)
GB/T 3077 20CrMn
Hot-rolled or forged structural alloy steel bars
Key Differences
GB/T 3077 20CrMn specifies Si, P, S, Cu which are not specified for BS 970 (Part 1) 590A15.
Can BS 970 (Part 1) 590A15 Be Substituted With GB/T 3077 20CrMn?
BS 970 (Part 1) 590A15 and GB/T 3077 20CrMn overlap closely enough on chemistry and mechanical properties that GB/T 3077 20CrMn is often considered as a substitute for BS 970 (Part 1) 590A15 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) 590A15 and GB/T 3077 20CrMn?
GB/T 3077 20CrMn specifies Si, P, S, Cu which are not specified for BS 970 (Part 1) 590A15.
Can BS 970 (Part 1) 590A15 be substituted with GB/T 3077 20CrMn?
BS 970 (Part 1) 590A15 and GB/T 3077 20CrMn overlap closely enough on chemistry and mechanical properties that GB/T 3077 20CrMn is often considered as a substitute for BS 970 (Part 1) 590A15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.