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BS 970 EN325 vs SAE J404 8720

Close Alternative — 75.8% match based on chemical composition and mechanical property overlap.

BS 970 EN325 (BS 970:1955) and SAE J404 8720 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN325 is defined under British Standards (BS), originating from United Kingdom, while SAE J404 8720 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 EN325 vs SAE J404 8720 is a 75.8% 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 75.8%.

Frequently Compared With BS 970 EN325:
NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
75.8%
MECHANICAL MATCH
No shared data
OVERALL
75.8%
Specifications
Property BS 970 EN325 SAE J404 8720
Standard BS 970:1955 SAE J404:2009
Category Alloy Steel Alloy Steel
C (%) <=0.22 0.18-0.23
Si (%) 0.10-0.35 0.15-0.35
Mn (%) 0.45-0.65 0.70-0.90
Ni (%) 1.50-2.00 0.40-0.70
Cr (%) 0.40-0.60 0.40-0.60
Mo (%) 0.20-0.30 0.20-0.30
S (%) <=0.050 <=0.040
P (%) <=0.050 <=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 EN325 SAE J404 8720
Tensile Strength ≥849 MPa (55 tons/sq in, converted) Not specified
Elongation ≥15% Not specified
Condition core, min (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN325
Not documented
SAE J404 8720
Chemistry-only alloy steel grade; see the composition notes for product scope
Can BS 970 EN325 Be Substituted With SAE J404 8720?
BS 970 EN325 and SAE J404 8720 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 EN325
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SAE J404 8720
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Frequently Asked Questions
What is the difference between BS 970 EN325 and SAE J404 8720?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN325 be substituted with SAE J404 8720?
BS 970 EN325 and SAE J404 8720 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.