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AISI 1040 vs BS 970 (Part 1) 080M40

Strong Match — 97.5% match based on chemical composition and mechanical property overlap.

AISI 1040 and BS 970 (Part 1) 080M40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Carbon Steel category. AISI 1040 is typically used for shafts, gears, bolts, couplings, crankshafts, while BS 970 (Part 1) 080M40 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. AISI 1040 is defined under AISI, originating from United States, while BS 970 (Part 1) 080M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, AISI 1040 vs BS 970 (Part 1) 080M40 is a 97.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 97.5%.

Frequently Compared With AISI 1040:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A40 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
97.5%
MECHANICAL MATCH
No shared data
OVERALL
97.5%
Specifications
Property AISI 1040 BS 970 (Part 1) 080M40
Standard AISI BS 970 (Part 1):1983
Category Carbon Steel Carbon Steel
C (%) 0.37–0.44 0.36-0.44
Mn (%) 0.60–0.90 0.60-1.00
S (%) ≤0.050 <=0.050
P (%) ≤0.030 <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AISI 1040 BS 970 (Part 1) 080M40
Condition Hot Rolled Not specified
Tensile Strength 565-690 MPa Not specified
Yield Strength 375-460 MPa Not specified
Elongation 20-30% Not specified
Hardness 179-217 HB Not specified
Typical Applications
AISI 1040
Shafts, gears, bolts, couplings, crankshafts
BS 970 (Part 1) 080M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Can AISI 1040 Be Substituted With BS 970 (Part 1) 080M40?
AISI 1040 and BS 970 (Part 1) 080M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 080M40 is often considered as a substitute for AISI 1040 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
AISI 1040
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–7000 mm (244.09–275.59 in)
BS 970 (Part 1) 080M40
No active listings currently.
On M-EX Right Now
AISI 1040
3 active listings and RFQs →
BS 970 (Part 1) 080M40
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Frequently Asked Questions
What is the difference between AISI 1040 and BS 970 (Part 1) 080M40?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can AISI 1040 be substituted with BS 970 (Part 1) 080M40?
AISI 1040 and BS 970 (Part 1) 080M40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 080M40 is often considered as a substitute for AISI 1040 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.