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BS 970 (Part 1) 080A20 vs BS 970 (Part 3) 045M10

Close Alternative — 80% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 080A20 (BS 970 (Part 1):1991) and BS 970 (Part 3) 045M10 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 1) 080A20 is typically used for used for nuts, bolts, hydraulic fittings, precision turned parts, sleeves, and couplings., while BS 970 (Part 3) 045M10 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). BS 970 (Part 1) 080A20 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 045M10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 080A20 vs BS 970 (Part 3) 045M10 is a 80% 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 80%.

Frequently Compared With BS 970 (Part 1) 080A20:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A45 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10
Match Breakdown
CHEMISTRY MATCH
80%
MECHANICAL MATCH
No shared data
OVERALL
80%
Specifications
Property BS 970 (Part 1) 080A20 BS 970 (Part 3) 045M10
Standard BS 970 (Part 1):1991 BS 970 (Part 3):1991
Category Carbon Steel Carbon Steel
C (%) 0.18-0.23 0.07-0.13
Mn (%) 0.70-0.90 0.30-0.60
Si (%) Not specified 0.10-0.40
P (%) Not specified <=0.05
S (%) Not specified <=0.05
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
BS 970 (Part 1) 080A20
Used for nuts, bolts, hydraulic fittings, precision turned parts, sleeves, and couplings.
BS 970 (Part 3) 045M10
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
Can BS 970 (Part 1) 080A20 Be Substituted With BS 970 (Part 3) 045M10?
BS 970 (Part 1) 080A20 and BS 970 (Part 3) 045M10 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.
Forms & Sizes Available on M-EX
BS 970 (Part 1) 080A20
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–6600 mm (188.98–259.84 in)
BS 970 (Part 3) 045M10
No active listings currently.
On M-EX Right Now
BS 970 (Part 1) 080A20
2 active listings and RFQs →
BS 970 (Part 3) 045M10
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 080A20 and BS 970 (Part 3) 045M10?
BS 970 (Part 3) 045M10 specifies Si, P, S which are not specified for BS 970 (Part 1) 080A20.
Can BS 970 (Part 1) 080A20 be substituted with BS 970 (Part 3) 045M10?
BS 970 (Part 1) 080A20 and BS 970 (Part 3) 045M10 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.