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JIS G4104 SCr415 vs BS 970 (Part 1) 590A15

Strong Match — 87.1% match based on chemical composition and mechanical property overlap.

JIS G4104 SCr415 (JIS G 4104:1979) and BS 970 (Part 1) 590A15 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. JIS G4104 SCr415 is typically used for case hardened gears, cams, pins, while BS 970 (Part 1) 590A15 is commonly used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties).. JIS G4104 SCr415 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 590A15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4104 SCr415 vs BS 970 (Part 1) 590A15 is a 87.1% 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 87.1%.

Frequently Compared With JIS G4104 SCr415:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
87.1%
MECHANICAL MATCH
No shared data
OVERALL
87.1%
Specifications
Property JIS G4104 SCr415 BS 970 (Part 1) 590A15
Standard JIS G 4104:1979 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.13–0.18 0.13-0.18
Si (%) 0.15–0.35 Not specified
Mn (%) 0.60–0.90 0.90-1.20
Cr (%) 0.90–1.20 0.90-1.20
P (%) ≤0.030 <=0.035
S (%) ≤0.030 <=0.040
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4104 SCr415 BS 970 (Part 1) 590A15
Tensile Strength ≥735 MPa Not specified
Case Hardness HRC 56–62 Not specified
Typical Applications
JIS G4104 SCr415
Case hardened gears, cams, pins
BS 970 (Part 1) 590A15
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
Can JIS G4104 SCr415 Be Substituted With BS 970 (Part 1) 590A15?
JIS G4104 SCr415 and BS 970 (Part 1) 590A15 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 590A15 is often considered as a substitute for JIS G4104 SCr415 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
JIS G4104 SCr415
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5600–5700 mm (220.47–224.41 in)
BS 970 (Part 1) 590A15
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On M-EX Right Now
JIS G4104 SCr415
2 active listings and RFQs →
BS 970 (Part 1) 590A15
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Frequently Asked Questions
What is the difference between JIS G4104 SCr415 and BS 970 (Part 1) 590A15?
JIS G4104 SCr415 specifies Si which is not specified for BS 970 (Part 1) 590A15.
Can JIS G4104 SCr415 be substituted with BS 970 (Part 1) 590A15?
JIS G4104 SCr415 and BS 970 (Part 1) 590A15 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 590A15 is often considered as a substitute for JIS G4104 SCr415 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.