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SAE J403 1025 vs BS 970 (Part 1) 040A04

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

SAE J403 1025 (SAE J403:2014) and BS 970 (Part 1) 040A04 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Carbon Steel category. SAE J403 1025 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 1025 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 1025 vs BS 970 (Part 1) 040A04 is a 89.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With SAE J403 1025:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 080A20 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
89.5%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property SAE J403 1025 BS 970 (Part 1) 040A04
Standard SAE J403:2014 BS 970 (Part 1):1991
Category Carbon Steel Carbon Steel
C (%) 0.22-0.28 <=0.08
Mn (%) 0.30-0.60 0.30-0.50
P (%) <=0.030 (flat rolled), <=0.040 (long products) Not specified
S (%) <=0.035 (flat rolled), <=0.050 (long products) 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 1025
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 1025 Be Substituted With BS 970 (Part 1) 040A04?
SAE J403 1025 and BS 970 (Part 1) 040A04 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
SAE J403 1025
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 4800–6200 mm (188.98–244.09 in)
BS 970 (Part 1) 040A04
No active listings currently.
On M-EX Right Now
SAE J403 1025
2 active listings and RFQs →
BS 970 (Part 1) 040A04
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Frequently Asked Questions
What is the difference between SAE J403 1025 and BS 970 (Part 1) 040A04?
SAE J403 1025 specifies P, S which are not specified for BS 970 (Part 1) 040A04.
Can SAE J403 1025 be substituted with BS 970 (Part 1) 040A04?
SAE J403 1025 and BS 970 (Part 1) 040A04 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.