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SAE J404 4027 vs BS 970 EN16A

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

SAE J404 4027 (SAE J404:2000) and BS 970 EN16A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. SAE J404 4027 is defined under SAE International, originating from United States, while BS 970 EN16A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, SAE J404 4027 vs BS 970 EN16A is a 88.6% 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 84.9%.

Frequently Compared With SAE J404 4027:
IS 1570 (Part 4) 103Cr4 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
88.6%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property SAE J404 4027 BS 970 EN16A
Standard SAE J404:2000 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.25-0.30 0.25-0.30
Mn (%) 0.70-0.90 1.30-1.80
Mo (%) 0.20-0.30 0.20-0.35
P (%) <=0.030 <=0.050
S (%) <=0.040 <=0.050
Si (%) 0.15-0.35 0.10-0.35
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property SAE J404 4027 BS 970 EN16A
Tensile Strength Not specified ≥695 MPa (45 tons/sq in, converted)
Yield Strength Not specified ≥525 MPa (34 tons/sq in, converted)
Elongation Not specified ≥22%
Hardness Not specified 201-255 HB
Condition Not specified Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
SAE J404 4027
Chemistry-only alloy steel grade; see the composition notes for product scope
BS 970 EN16A
Not documented
Can SAE J404 4027 Be Substituted With BS 970 EN16A?
SAE J404 4027 and BS 970 EN16A 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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SAE J404 4027
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BS 970 EN16A
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Frequently Asked Questions
What is the difference between SAE J404 4027 and BS 970 EN16A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J404 4027 be substituted with BS 970 EN16A?
SAE J404 4027 and BS 970 EN16A 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.