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BS 970 EN7A vs SAE J403 1126

Close Alternative — 76.3% match based on chemical composition and mechanical property overlap.

BS 970 EN7A (BS 970:1955) and SAE J403 1126 (SAE J403:2001) are both steel grades. Both fall under the Free Machining Steel category. BS 970 EN7A is typically used for bright bars for machining, while SAE J403 1126 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 EN7A is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1126 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN7A vs SAE J403 1126 is a 76.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 76.3%.

Frequently Compared With BS 970 EN7A:
SAE J403 1117 SAE J403 1117 IS 4432 10C8S10 SAE J403 1117 SAE J403 1118 SAE J403 1132 IS 1570 (Part 3) 10C8S10 SAE J403 1118 SAE J403 1118 SAE J403 1126 SAE J403 1126 SAE J403 1132
Match Breakdown
CHEMISTRY MATCH
76.3%
MECHANICAL MATCH
No shared data
OVERALL
76.3%
Specifications
Property BS 970 EN7A SAE J403 1126
Standard BS 970:1955 SAE J403:2001
Category Free Machining Steel Free Machining Steel
C (%) 0.12-0.18 0.23-0.29
Si (%) <=0.25 Not specified
Mn (%) 1.00-1.50 0.70-1.00
S (%) 0.10-0.18 0.08-0.13
P (%) <=0.060 <=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 EN7A SAE J403 1126
Tensile Strength ≥432 MPa (28 tons/sq in, converted) Not specified
Elongation ≥25% Not specified
Condition Hot rolled or normalised, ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN7A
Bright bars for machining
SAE J403 1126
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 EN7A Be Substituted With SAE J403 1126?
BS 970 EN7A and SAE J403 1126 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
BS 970 EN7A
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SAE J403 1126
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Frequently Asked Questions
What is the difference between BS 970 EN7A and SAE J403 1126?
BS 970 EN7A specifies Si which is not specified for SAE J403 1126.
Can BS 970 EN7A be substituted with SAE J403 1126?
BS 970 EN7A and SAE J403 1126 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.