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SAE J403 1003 vs BS 970 (Part 1) 040A04

Strong Match — 89.4% match based on chemical composition and mechanical property overlap.

SAE J403 1003 (SAE J403:2009) and BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. SAE J403 1003 is typically used for chemistry-only grade; product scope as listed in the composition notes, while BS 970 (Part 1) 040A04 is commonly used for as-rolled, or as-rolled and softened, steel (section two). SAE J403 1003 is defined under SAE International, originating from United States, while BS 970 (Part 1) 040A04 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, SAE J403 1003 vs BS 970 (Part 1) 040A04 is a 89.4% 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 89.4%.

Frequently Compared With SAE J403 1003:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 3) 045A10
Match Breakdown
CHEMISTRY MATCH
89.4%
MECHANICAL MATCH
No shared data
OVERALL
89.4%
Specifications
Property SAE J403 1003 BS 970 (Part 1) 040A04
Standard SAE J403:2009 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.02-0.06 <=0.08
Mn (%) <=0.35 0.30-0.50
P (%) <=0.030 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
SAE J403 1003
Chemistry-only grade; product scope as listed in the composition notes
BS 970 (Part 1) 040A04
As-rolled, or as-rolled and softened, steel (section two)
Key Differences
Can SAE J403 1003 Be Substituted With BS 970 (Part 1) 040A04?
SAE J403 1003 and BS 970 (Part 1) 040A04 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 040A04 is often considered as a substitute for SAE J403 1003 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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SAE J403 1003
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BS 970 (Part 1) 040A04
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Frequently Asked Questions
What is the difference between SAE J403 1003 and BS 970 (Part 1) 040A04?
SAE J403 1003 specifies P, S which are not specified for BS 970 (Part 1) 040A04.
Can SAE J403 1003 be substituted with BS 970 (Part 1) 040A04?
SAE J403 1003 and BS 970 (Part 1) 040A04 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 040A04 is often considered as a substitute for SAE J403 1003 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.