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BS 970 EN207 vs JIS G4104 SCr420

Close Alternative — 83.5% match based on chemical composition and mechanical property overlap.

BS 970 EN207 (BS 970:1955) and JIS G4104 SCr420 (JIS G 4104:1979) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN207 is defined under British Standards (BS), originating from United Kingdom, while JIS G4104 SCr420 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 EN207 vs JIS G4104 SCr420 is a 83.5% 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 83.5%.

Frequently Compared With BS 970 EN207:
IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
83.5%
MECHANICAL MATCH
No shared data
OVERALL
83.5%
Specifications
Property BS 970 EN207 JIS G4104 SCr420
Standard BS 970:1955 JIS G 4104:1979
Category Alloy Steel Alloy Steel
C (%) 0.16-0.21 0.18–0.23
Si (%) 0.10-0.35 0.15–0.35
Mn (%) 0.60-0.80 0.60–0.90
Cr (%) 0.60-0.80 0.90–1.20
S (%) <=0.050 ≤0.030
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 EN207 JIS G4104 SCr420
Tensile Strength Not specified ≥830 MPa
Case Hardness HRC Not specified 58–62
Core Hardness HB Not specified 235–293
Typical Applications
BS 970 EN207
Not documented
JIS G4104 SCr420
Case hardened gears, shafts, cams
Can BS 970 EN207 Be Substituted With JIS G4104 SCr420?
BS 970 EN207 and JIS G4104 SCr420 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.
Forms & Sizes Available on M-EX
BS 970 EN207
No active listings currently.
JIS G4104 SCr420
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5300–5600 mm (208.66–220.47 in)
On M-EX Right Now
BS 970 EN207
0 active listings and RFQs →
JIS G4104 SCr420
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 EN207 and JIS G4104 SCr420?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN207 be substituted with JIS G4104 SCr420?
BS 970 EN207 and JIS G4104 SCr420 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.