Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
GB/T 699 75 (GB/T 699:2015) and BS 970 (Part 3) 045A10 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Carbon Steel category.
GB/T 699 75 is typically used for hot-rolled or forged quality carbon structural steel bars up to 250 mm, while BS 970 (Part 3) 045A10 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (table 14).
GB/T 699 75 is defined under Guobiao Standards (GB/T), originating from China, while BS 970 (Part 3) 045A10 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, GB/T 699 75 vs BS 970 (Part 3) 045A10 is a 67% 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.
Mechanical Properties
Property
GB/T 699 75
BS 970 (Part 3) 045A10
Tensile Strength
>=1080 MPa
Not specified
Yield Strength
>=880 MPa
Not specified
Elongation
>=7%
Not specified
Hardness
<=285 HB (as delivered, not heat treated)
Not specified
Condition
Quenched and tempered sample (with working allowance), bars up to 80 mm; hardness for delivery state
Not specified
Typical Applications
GB/T 699 75
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
BS 970 (Part 3) 045A10
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (Table 14)
Key Differences
GB/T 699 75 specifies Cr, Ni, Cu which are not specified for BS 970 (Part 3) 045A10.
Can GB/T 699 75 Be Substituted With BS 970 (Part 3) 045A10?
GB/T 699 75 and BS 970 (Part 3) 045A10 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 GB/T 699 75 and BS 970 (Part 3) 045A10?
GB/T 699 75 specifies Cr, Ni, Cu which are not specified for BS 970 (Part 3) 045A10.
Can GB/T 699 75 be substituted with BS 970 (Part 3) 045A10?
GB/T 699 75 and BS 970 (Part 3) 045A10 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.