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BS 970 (Part 1) 045M10 vs BS 970 (Part 1) 055M15

Strong Match — 90.4% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 045M10 (BS 970 (Part 1):1983) and BS 970 (Part 1) 055M15 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 1) 045M10 is typically used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties)., while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 (Part 1) 045M10 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 055M15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 045M10 vs BS 970 (Part 1) 055M15 is a 90.4% 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 90.4%.

Frequently Compared With BS 970 (Part 1) 045M10:
BS 970 (Part 1) 045M10 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A40 BS 970 (Part 1) 060A57 BS 970 (Part 3) 070M55 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A45 BS 970 (Part 3) 070M20 BS 970 (Part 1) 060A81
Match Breakdown
CHEMISTRY MATCH
90.4%
MECHANICAL MATCH
No shared data
OVERALL
90.4%
Specifications
Property BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15
Standard BS 970 (Part 1):1983 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.07-0.13 <=0.20
Mn (%) 0.30-0.60 <=0.80
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.
Mechanical Properties
Property BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15
Condition Not specified As-rolled
Tensile Strength Not specified 310 MPa min
Elongation Not specified 25 % min
Hardness Not specified 121 HB min
Typical Applications
BS 970 (Part 1) 045M10
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 (Part 1) 045M10 Be Substituted With BS 970 (Part 1) 055M15?
BS 970 (Part 1) 045M10 and BS 970 (Part 1) 055M15 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 055M15 is often considered as a substitute for BS 970 (Part 1) 045M10 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 (Part 1) 045M10
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 045M10 and BS 970 (Part 1) 055M15?
BS 970 (Part 1) 045M10 specifies P, S which are not specified for BS 970 (Part 1) 055M15.
Can BS 970 (Part 1) 045M10 be substituted with BS 970 (Part 1) 055M15?
BS 970 (Part 1) 045M10 and BS 970 (Part 1) 055M15 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 055M15 is often considered as a substitute for BS 970 (Part 1) 045M10 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.