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BS 970 (Part 1) 040A12 vs SAE J403 1012

Strong Match — 98.1% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 040A12 (BS 970 (Part 1):1991) and SAE J403 1012 (SAE J403:2014) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 1) 040A12 is typically used for as-rolled, or as-rolled and softened, steel (section two), while SAE J403 1012 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 (Part 1) 040A12 is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1012 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 (Part 1) 040A12 vs SAE J403 1012 is a 98.1% 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 98.1%.

Frequently Compared With BS 970 (Part 1) 040A12:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 060A62 BS 970 (Part 1) 060A72 BS 970 (Part 1) 060A81 BS 970 (Part 1) 055M15 BS 970 (Part 1) 070A67 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A67 BS 970 (Part 1) 060A78 BS 970 (Part 3) 070M20 BS 970 (Part 3) 070M55
Match Breakdown
CHEMISTRY MATCH
98.1%
MECHANICAL MATCH
No shared data
OVERALL
98.1%
Specifications
Property BS 970 (Part 1) 040A12 SAE J403 1012
Standard BS 970 (Part 1):1991 SAE J403:2014
Category Carbon Steel Carbon Steel
C (%) 0.10-0.15 0.10-0.15
Mn (%) 0.30-0.50 0.30-0.60
P (%) Not specified <=0.030 (flat rolled), <=0.040 (long products)
S (%) Not specified <=0.035 (flat rolled), <=0.050 (long products)
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) 040A12
As-rolled, or as-rolled and softened, steel (section two)
SAE J403 1012
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 (Part 1) 040A12 Be Substituted With SAE J403 1012?
BS 970 (Part 1) 040A12 and SAE J403 1012 overlap closely enough on chemistry and mechanical properties that SAE J403 1012 is often considered as a substitute for BS 970 (Part 1) 040A12 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
On M-EX Right Now
BS 970 (Part 1) 040A12
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SAE J403 1012
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 040A12 and SAE J403 1012?
SAE J403 1012 specifies P, S which are not specified for BS 970 (Part 1) 040A12.
Can BS 970 (Part 1) 040A12 be substituted with SAE J403 1012?
BS 970 (Part 1) 040A12 and SAE J403 1012 overlap closely enough on chemistry and mechanical properties that SAE J403 1012 is often considered as a substitute for BS 970 (Part 1) 040A12 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.