Post Stock Login Register

BS 970 (Part 1) 080M40 vs AISI 1040

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

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

As per chemical composition, BS 970 (Part 1) 080M40 vs AISI 1040 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 BS 970 (Part 1) 080M40:
BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A45 BS 970 (Part 1) 040A04 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) 045M10 BS 970 (Part 1) 055M15
Match Breakdown
CHEMISTRY MATCH
97.5%
MECHANICAL MATCH
No shared data
OVERALL
97.5%
Specifications
Property BS 970 (Part 1) 080M40 AISI 1040
Standard BS 970 (Part 1):1983 AISI
Category Carbon Steel Carbon Steel
C (%) 0.36-0.44 0.37–0.44
Mn (%) 0.60-1.00 0.60–0.90
P (%) <=0.050 ≤0.030
S (%) <=0.050 ≤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 BS 970 (Part 1) 080M40 AISI 1040
Condition Not specified Hot Rolled
Tensile Strength Not specified 565-690 MPa
Yield Strength Not specified 375-460 MPa
Elongation Not specified 20-30%
Hardness Not specified 179-217 HB
Typical Applications
BS 970 (Part 1) 080M40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
AISI 1040
Shafts, gears, bolts, couplings, crankshafts
Can BS 970 (Part 1) 080M40 Be Substituted With AISI 1040?
BS 970 (Part 1) 080M40 and AISI 1040 overlap closely enough on chemistry and mechanical properties that AISI 1040 is often considered as a substitute for BS 970 (Part 1) 080M40 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
BS 970 (Part 1) 080M40
No active listings currently.
AISI 1040
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–7000 mm (244.09–275.59 in)
On M-EX Right Now
BS 970 (Part 1) 080M40
0 active listings and RFQs →
AISI 1040
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 080M40 and AISI 1040?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 080M40 be substituted with AISI 1040?
BS 970 (Part 1) 080M40 and AISI 1040 overlap closely enough on chemistry and mechanical properties that AISI 1040 is often considered as a substitute for BS 970 (Part 1) 080M40 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.