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BS 970 EN4A vs SAE J403 1009

Strong Match — 86.8% match based on chemical composition and mechanical property overlap.

BS 970 EN4A (BS 970:1955) and SAE J403 1009 (SAE J403:2014) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN4A is typically used for bright bars for machining. (as altered feb. 1955), while SAE J403 1009 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 EN4A is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1009 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN4A vs SAE J403 1009 is a 86.8% 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 86.8%.

Frequently Compared With BS 970 EN4A:
BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 070M20 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32 BS 970 (Part 1) 060A40
Match Breakdown
CHEMISTRY MATCH
86.8%
MECHANICAL MATCH
No shared data
OVERALL
86.8%
Specifications
Property BS 970 EN4A SAE J403 1009
Standard BS 970:1955 SAE J403:2014
Category Carbon Steel Carbon Steel
C (%) <=0.30 <=0.15
Si (%) 0.05-0.35 Not specified
Mn (%) <=1.00 <=0.60
S (%) <=0.060 <=0.035 (flat rolled), <=0.050 (long products)
P (%) <=0.060 <=0.030 (flat rolled), <=0.040 (long products)
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 EN4A SAE J403 1009
Tensile Strength 494-649 MPa (32-42 tons/sq in, converted) Not specified
Elongation ≥12% Not specified
Condition , ruling section 2 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN4A
Bright bars for machining. (As altered Feb. 1955)
SAE J403 1009
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 EN4A Be Substituted With SAE J403 1009?
BS 970 EN4A and SAE J403 1009 overlap closely enough on chemistry and mechanical properties that SAE J403 1009 is often considered as a substitute for BS 970 EN4A 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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BS 970 EN4A
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SAE J403 1009
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Frequently Asked Questions
What is the difference between BS 970 EN4A and SAE J403 1009?
BS 970 EN4A specifies Si which is not specified for SAE J403 1009.
Can BS 970 EN4A be substituted with SAE J403 1009?
BS 970 EN4A and SAE J403 1009 overlap closely enough on chemistry and mechanical properties that SAE J403 1009 is often considered as a substitute for BS 970 EN4A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.