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BS 970 (Part 3) 070M20 vs BS 970 (Part 1) 055M15

Close Alternative — 83.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 070M20 (BS 970 (Part 3):1991) 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 3) 070M20 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; carbon and carbon manganese steel (table 13), while BS 970 (Part 1) 055M15 is commonly used for as-rolled, or as-rolled and softened, steel (section two). BS 970 (Part 3) 070M20 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 3) 070M20 vs BS 970 (Part 1) 055M15 is a 83.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 83.3%.

Frequently Compared With BS 970 (Part 3) 070M20:
BS 970 (Part 1) 060A62 BS 970 (Part 1) 060A67 BS 970 (Part 1) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 060A72 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10
Match Breakdown
CHEMISTRY MATCH
83.3%
MECHANICAL MATCH
No shared data
OVERALL
83.3%
Specifications
Property BS 970 (Part 3) 070M20 BS 970 (Part 1) 055M15
Standard BS 970 (Part 3):1991 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.16-0.24 <=0.20
Si (%) 0.10-0.40 Not specified
Mn (%) 0.50-0.90 <=0.80
P (%) <=0.05 Not specified
S (%) <=0.05 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 3) 070M20 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 3) 070M20
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; carbon and carbon manganese steel (Table 13)
BS 970 (Part 1) 055M15
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can BS 970 (Part 3) 070M20 Be Substituted With BS 970 (Part 1) 055M15?
BS 970 (Part 3) 070M20 and BS 970 (Part 1) 055M15 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
BS 970 (Part 3) 070M20
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BS 970 (Part 1) 055M15
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Frequently Asked Questions
What is the difference between BS 970 (Part 3) 070M20 and BS 970 (Part 1) 055M15?
BS 970 (Part 3) 070M20 specifies Si, P, S which are not specified for BS 970 (Part 1) 055M15.
Can BS 970 (Part 3) 070M20 be substituted with BS 970 (Part 1) 055M15?
BS 970 (Part 3) 070M20 and BS 970 (Part 1) 055M15 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.