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BS 970 EN43A vs SAE J403 1053

Strong Match — 90.8% match based on chemical composition and mechanical property overlap.

BS 970 EN43A (BS 970:1955) and SAE J403 1053 (SAE J403:2014) are both steel grades. Both fall under the Carbon Steel category. BS 970 EN43A is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable hardened and tempered for 45/55 (r) and 50/60 (s) tons/sq in according to ruling section; purchaser to state normalised, cold drawn or hardened and tempered r or s. en 43a to 43e., while SAE J403 1053 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 EN43A is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1053 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN43A vs SAE J403 1053 is a 90.8% 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 90.8%.

Frequently Compared With BS 970 EN43A:
BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A40 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A10 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
90.8%
MECHANICAL MATCH
No shared data
OVERALL
90.8%
Specifications
Property BS 970 EN43A SAE J403 1053
Standard BS 970:1955 SAE J403:2014
Category Carbon Steel Carbon Steel
C (%) 0.45-0.55 0.48-0.55
Si (%) 0.05-0.35 Not specified
Mn (%) 0.70-1.00 0.70-1.00
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 EN43A SAE J403 1053
Tensile Strength ≥618 MPa (40 tons/sq in, converted) Not specified
Yield Strength ≥324 MPa (21 tons/sq in, converted) Not specified
Elongation ≥18% Not specified
Hardness 179-229 HB Not specified
Condition Normalised, ruling section 1 1/8 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN43A
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable hardened and tempered for 45/55 (R) and 50/60 (S) tons/sq in according to ruling section; purchaser to state normalised, cold drawn or hardened and tempered R or S. En 43A to 43E.
SAE J403 1053
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 EN43A Be Substituted With SAE J403 1053?
BS 970 EN43A and SAE J403 1053 overlap closely enough on chemistry and mechanical properties that SAE J403 1053 is often considered as a substitute for BS 970 EN43A 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 EN43A
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SAE J403 1053
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Frequently Asked Questions
What is the difference between BS 970 EN43A and SAE J403 1053?
BS 970 EN43A specifies Si which is not specified for SAE J403 1053.
Can BS 970 EN43A be substituted with SAE J403 1053?
BS 970 EN43A and SAE J403 1053 overlap closely enough on chemistry and mechanical properties that SAE J403 1053 is often considered as a substitute for BS 970 EN43A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.