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AISI 1040 vs BS 970 (Part 1) 055M15

Related Material — 58% match based on chemical composition and mechanical property overlap.

AISI 1040 and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) 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) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). AISI 1040 is defined under AISI, originating from United States, while BS 970 (Part 1) 055M15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, AISI 1040 vs BS 970 (Part 1) 055M15 is a 87% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 58%.

Frequently Compared With AISI 1040:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
87%
MECHANICAL MATCH
0%
OVERALL
58%
Specifications
Property AISI 1040 BS 970 (Part 1) 055M15
Standard AISI BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.37–0.44 <=0.20
Mn (%) 0.60–0.90 <=0.80
S (%) ≤0.050 Not specified
P (%) ≤0.030 Not specified
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) 055M15
Condition Hot Rolled As-rolled
Tensile Strength 565-690 MPa 310 MPa min
Yield Strength 375-460 MPa Not specified
Elongation 20-30% 25 % min
Hardness 179-217 HB 121 HB min
Typical Applications
AISI 1040
Shafts, gears, bolts, couplings, crankshafts
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can AISI 1040 Be Substituted With BS 970 (Part 1) 055M15?
AISI 1040 and BS 970 (Part 1) 055M15 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
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) 055M15
No active listings currently.
On M-EX Right Now
AISI 1040
3 active listings and RFQs →
BS 970 (Part 1) 055M15
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI 1040 and BS 970 (Part 1) 055M15?
AISI 1040 specifies S, P which are not specified for BS 970 (Part 1) 055M15.
Can AISI 1040 be substituted with BS 970 (Part 1) 055M15?
AISI 1040 and BS 970 (Part 1) 055M15 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.