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JIS G4053 SMnC420 vs BS 970 (Part 1) 523H15

Close Alternative — 77.6% match based on chemical composition and mechanical property overlap.

JIS G4053 SMnC420 (JIS G4053:2008) and BS 970 (Part 1) 523H15 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. JIS G4053 SMnC420 is typically used for case hardened gears, shafts, cams, pins, automotive components, while BS 970 (Part 1) 523H15 is commonly used for case hardening steel (section four). JIS G4053 SMnC420 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 523H15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4053 SMnC420 vs BS 970 (Part 1) 523H15 is a 77.6% 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 77.6%.

Frequently Compared With JIS G4053 SMnC420:
UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A NF A35-565 100C6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
77.6%
MECHANICAL MATCH
No shared data
OVERALL
77.6%
Specifications
Property JIS G4053 SMnC420 BS 970 (Part 1) 523H15
Standard JIS G4053:2008 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.17–0.23 0.12-0.18
Mn (%) 1.15–1.55 0.30-0.60
Cr (%) 0.35–0.70 0.30-0.60
Si (%) 0.15–0.35 Not specified
S (%) ≤0.030 Not specified
P (%) ≤0.030 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4053 SMnC420 BS 970 (Part 1) 523H15
Tensile Strength 785–980 MPa Not specified
Case Hardness HRC 58–62 Not specified
Core Hardness HB 217–277 Not specified
Elongation ≥10% Not specified
Typical Applications
JIS G4053 SMnC420
Case hardened gears, shafts, cams, pins, automotive components
BS 970 (Part 1) 523H15
Case hardening steel (section four)
Key Differences
Can JIS G4053 SMnC420 Be Substituted With BS 970 (Part 1) 523H15?
JIS G4053 SMnC420 and BS 970 (Part 1) 523H15 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
JIS G4053 SMnC420
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6500–6500 mm (255.91–255.91 in)
BS 970 (Part 1) 523H15
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On M-EX Right Now
JIS G4053 SMnC420
2 active listings and RFQs →
BS 970 (Part 1) 523H15
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Frequently Asked Questions
What is the difference between JIS G4053 SMnC420 and BS 970 (Part 1) 523H15?
JIS G4053 SMnC420 specifies Si, S, P which are not specified for BS 970 (Part 1) 523H15.
Can JIS G4053 SMnC420 be substituted with BS 970 (Part 1) 523H15?
JIS G4053 SMnC420 and BS 970 (Part 1) 523H15 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.