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BS 970 EN15AM vs SAE J403 1118

Close Alternative — 78.4% match based on chemical composition and mechanical property overlap.

BS 970 EN15AM (BS 970:1955) and SAE J403 1118 (SAE J403:2009) are both steel grades. Both fall under the Free Machining Steel category. BS 970 EN15AM is typically used for bars and billets for forging; forgings and drop forgings; bars for machining; bright bars. suitable for tensile strength 45/55 (r) tons/sq in., while SAE J403 1118 is commonly used for chemistry-only grade; product scope as listed in the composition notes. BS 970 EN15AM is defined under British Standards (BS), originating from United Kingdom, while SAE J403 1118 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN15AM vs SAE J403 1118 is a 78.4% 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 78.4%.

Frequently Compared With BS 970 EN15AM:
IS 1570 (Part 3) 10C8S10 SAE J403 1117 SAE J403 1117 SAE J403 1118 SAE J403 1118 SAE J403 1126 SAE J403 1132 IS 4432 10C8S10 SAE J403 1117 SAE J403 1126 SAE J403 1126 SAE J403 1132
Match Breakdown
CHEMISTRY MATCH
78.4%
MECHANICAL MATCH
No shared data
OVERALL
78.4%
Specifications
Property BS 970 EN15AM SAE J403 1118
Standard BS 970:1955 SAE J403:2009
Category Free Machining Steel Free Machining Steel
C (%) 0.30-0.40 0.14-0.20
Si (%) <=0.25 Not specified
Mn (%) 1.30-1.70 1.30-1.60
S (%) 0.12-0.20 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 EN15AM SAE J403 1118
Tensile Strength ≥695 MPa (45 tons/sq in, converted) Not specified
Yield Strength ≥525 MPa (34 tons/sq in, converted) Not specified
Elongation ≥20% Not specified
Hardness 201-255 HB Not specified
Condition Hardened and tempered R, ruling section 2 1/2 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN15AM
Bars and billets for forging; forgings and drop forgings; bars for machining; bright bars. Suitable for tensile strength 45/55 (R) tons/sq in.
SAE J403 1118
Chemistry-only grade; product scope as listed in the composition notes
Key Differences
Can BS 970 EN15AM Be Substituted With SAE J403 1118?
BS 970 EN15AM and SAE J403 1118 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.
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BS 970 EN15AM
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SAE J403 1118
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Frequently Asked Questions
What is the difference between BS 970 EN15AM and SAE J403 1118?
BS 970 EN15AM specifies Si which is not specified for SAE J403 1118.
Can BS 970 EN15AM be substituted with SAE J403 1118?
BS 970 EN15AM and SAE J403 1118 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.