Close Alternative — 72% match
based on chemical composition and mechanical property overlap.
GB/T 3077 20MnMoB (GB/T 3077:2015) and BS 970 (Part 3) 605M36 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 20MnMoB is typically used for hot-rolled or forged structural alloy steel bars, while BS 970 (Part 3) 605M36 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (table 16).
GB/T 3077 20MnMoB is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 3) 605M36 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, GB/T 3077 20MnMoB vs BS 970 (Part 3) 605M36 is a 72% 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 72%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
GB/T 3077 20MnMoB
BS 970 (Part 3) 605M36
Tensile Strength
>=1080 MPa
Not specified
Yield Strength
>=885 MPa
Not specified
Elongation
>=10%
Not specified
Hardness
<=207 HB
Not specified
Condition
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Not specified
Typical Applications
GB/T 3077 20MnMoB
Hot-rolled or forged structural alloy steel bars
BS 970 (Part 3) 605M36
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy direct hardening steel (Table 16)
Key Differences
GB/T 3077 20MnMoB specifies B, Cu which are not specified for BS 970 (Part 3) 605M36.
Can GB/T 3077 20MnMoB Be Substituted With BS 970 (Part 3) 605M36?
GB/T 3077 20MnMoB and BS 970 (Part 3) 605M36 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 GB/T 3077 20MnMoB and BS 970 (Part 3) 605M36?
GB/T 3077 20MnMoB specifies B, Cu which are not specified for BS 970 (Part 3) 605M36.
Can GB/T 3077 20MnMoB be substituted with BS 970 (Part 3) 605M36?
GB/T 3077 20MnMoB and BS 970 (Part 3) 605M36 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.