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BS 970 (Part 1) 125A15 vs BS 970 (Part 1) 040A10

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

BS 970 (Part 1) 125A15 (BS 970 (Part 1):1983) and BS 970 (Part 1) 040A10 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 1) 125A15 is typically used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties)., while BS 970 (Part 1) 040A10 is commonly used for used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.. BS 970 (Part 1) 125A15 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 040A10 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 125A15 vs BS 970 (Part 1) 040A10 is a 85.7% 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 1) 125A15:
BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A45
Match Breakdown
CHEMISTRY MATCH
85.7%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property BS 970 (Part 1) 125A15 BS 970 (Part 1) 040A10
Standard BS 970 (Part 1):1983 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.13-0.18 0.08-0.13
Mn (%) 1.10-1.40 0.30-0.50
P (%) <=0.050 Not specified
S (%) <=0.050 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 1) 125A15
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
BS 970 (Part 1) 040A10
Used for bolts, studs, shafts, brackets, fabricated components, and general engineering parts.
Key Differences
Can BS 970 (Part 1) 125A15 Be Substituted With BS 970 (Part 1) 040A10?
BS 970 (Part 1) 125A15 and BS 970 (Part 1) 040A10 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 1) 125A15
No active listings currently.
BS 970 (Part 1) 040A10
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4700–5500 mm (185.04–216.54 in)
On M-EX Right Now
BS 970 (Part 1) 125A15
0 active listings and RFQs →
BS 970 (Part 1) 040A10
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 125A15 and BS 970 (Part 1) 040A10?
BS 970 (Part 1) 125A15 specifies P, S which are not specified for BS 970 (Part 1) 040A10.
Can BS 970 (Part 1) 125A15 be substituted with BS 970 (Part 1) 040A10?
BS 970 (Part 1) 125A15 and BS 970 (Part 1) 040A10 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.