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BS 970 (Part 1) 040A04 vs SAE J403 1008

Strong Match — 97.1% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) and SAE J403 1008 (SAE J403:2009) are both steel grades. Both fall under the Carbon Steel category. BS 970 (Part 1) 040A04 is typically used for as-rolled, or as-rolled and softened, steel (section two), while SAE J403 1008 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 (Part 1) 040A04 is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1008 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 (Part 1) 040A04 vs SAE J403 1008 is a 97.1% 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 97.1%.

Frequently Compared With BS 970 (Part 1) 040A04:
BS 970 (Part 1) 060A67 BS 970 (Part 1) 060A81 BS 970 (Part 1) 070A67 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A62 BS 970 (Part 1) 060A78 BS 970 (Part 1) 045A10 BS 970 (Part 1) 060A47 BS 970 (Part 1) 060A72 BS 970 (Part 1) 080A15 BS 970 (Part 3) 080A15 BS 970 (Part 3) 070M20
Match Breakdown
CHEMISTRY MATCH
97.1%
MECHANICAL MATCH
No shared data
OVERALL
97.1%
Specifications
Property BS 970 (Part 1) 040A04 SAE J403 1008
Standard BS 970 (Part 1):1991 SAE J403:2009
Category Carbon Steel Carbon Steel
C (%) <=0.08 <=0.10
Mn (%) 0.30-0.50 0.30-0.50
P (%) Not specified <=0.030
S (%) Not specified <=0.050
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) 040A04
As-rolled, or as-rolled and softened, steel (section two)
SAE J403 1008
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 (Part 1) 040A04 Be Substituted With SAE J403 1008?
BS 970 (Part 1) 040A04 and SAE J403 1008 overlap closely enough on chemistry and mechanical properties that SAE J403 1008 is often considered as a substitute for BS 970 (Part 1) 040A04 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) 040A04
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SAE J403 1008
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 040A04 and SAE J403 1008?
SAE J403 1008 specifies P, S which are not specified for BS 970 (Part 1) 040A04.
Can BS 970 (Part 1) 040A04 be substituted with SAE J403 1008?
BS 970 (Part 1) 040A04 and SAE J403 1008 overlap closely enough on chemistry and mechanical properties that SAE J403 1008 is often considered as a substitute for BS 970 (Part 1) 040A04 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.