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BS 970 (Part 3) 080M40 vs BS 970 (Part 1) 080A20

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 080M40 (BS 970 (Part 3):1991) and BS 970 (Part 1) 080A20 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 3) 080M40 is typically used for shafts, gears, axles, general engineering, while BS 970 (Part 1) 080A20 is commonly used for used for nuts, bolts, hydraulic fittings, precision turned parts, sleeves, and couplings.. BS 970 (Part 3) 080M40 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 080A20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 3) 080M40 vs BS 970 (Part 1) 080A20 is a 82.9% 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%.

Frequently Compared With BS 970 (Part 3) 080M40:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
82.9%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property BS 970 (Part 3) 080M40 BS 970 (Part 1) 080A20
Standard BS 970 (Part 3):1991 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.36-0.44 0.18-0.23
Si (%) 0.10-0.40 Not specified
Mn (%) 0.60-1.00 0.70-0.90
P (%) <=0.05 Not specified
S (%) <=0.05 Not specified
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 3) 080M40
Shafts, gears, axles, general engineering
BS 970 (Part 1) 080A20
Used for nuts, bolts, hydraulic fittings, precision turned parts, sleeves, and couplings.
Key Differences
Can BS 970 (Part 3) 080M40 Be Substituted With BS 970 (Part 1) 080A20?
BS 970 (Part 3) 080M40 and BS 970 (Part 1) 080A20 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.
Forms & Sizes Available on M-EX
BS 970 (Part 3) 080M40
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6000–6900 mm (236.22–271.65 in)
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)
On M-EX Right Now
BS 970 (Part 3) 080M40
2 active listings and RFQs →
BS 970 (Part 1) 080A20
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 080M40 and BS 970 (Part 1) 080A20?
BS 970 (Part 3) 080M40 specifies Si, P, S which are not specified for BS 970 (Part 1) 080A20.
Can BS 970 (Part 3) 080M40 be substituted with BS 970 (Part 1) 080A20?
BS 970 (Part 3) 080M40 and BS 970 (Part 1) 080A20 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.