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BS 970 EN3C vs SAE J403 1021

Strong Match — 90.3% match based on chemical composition and mechanical property overlap.

BS 970 EN3C (BS 970:1955) and SAE J403 1021 (SAE J403:2001) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN3C is typically used for welded fabrications, light structural work, while SAE J403 1021 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 EN3C is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1021 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN3C vs SAE J403 1021 is a 90.3% 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 90.3%.

Frequently Compared With BS 970 EN3C:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 3) 070M20 BS 970 (Part 1) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10
Match Breakdown
CHEMISTRY MATCH
90.3%
MECHANICAL MATCH
No shared data
OVERALL
90.3%
Specifications
Property BS 970 EN3C SAE J403 1021
Standard BS 970:1955 SAE J403:2001
Category Carbon Steel Carbon Steel
C (%) 0.17-0.23 0.18-0.23
Si (%) 0.05-0.35 Not specified
Mn (%) 0.60-1.00 0.60-0.90
S (%) <=0.050 <=0.050
P (%) <=0.050 <=0.030
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 EN3C SAE J403 1021
Tensile Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥25% Not specified
Condition , ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN3C
Welded fabrications, light structural work
SAE J403 1021
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 EN3C Be Substituted With SAE J403 1021?
BS 970 EN3C and SAE J403 1021 overlap closely enough on chemistry and mechanical properties that SAE J403 1021 is often considered as a substitute for BS 970 EN3C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
BS 970 EN3C
Round Bar → (3 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6200–6800 mm (244.09–267.72 in)
SAE J403 1021
No active listings currently.
On M-EX Right Now
BS 970 EN3C
3 active listings and RFQs →
SAE J403 1021
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN3C and SAE J403 1021?
BS 970 EN3C specifies Si which is not specified for SAE J403 1021.
Can BS 970 EN3C be substituted with SAE J403 1021?
BS 970 EN3C and SAE J403 1021 overlap closely enough on chemistry and mechanical properties that SAE J403 1021 is often considered as a substitute for BS 970 EN3C in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.