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JIS G4105 SCM420 vs UNI 11234 100Cr6

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

JIS G4105 SCM420 (JIS G4105:1979) and UNI 11234 100Cr6 (UNI 11234:2007) are both steel grades. Both fall under the Alloy Steel category. JIS G4105 SCM420 is typically used for case hardened gears, cams, pins, shafts, while UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. JIS G4105 SCM420 is defined under Japanese Industrial Standards (JIS), originating from Japan, while UNI 11234 100Cr6 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy.

As per chemical composition, JIS G4105 SCM420 vs UNI 11234 100Cr6 is a 65.7% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With JIS G4105 SCM420:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 07Cr4Mo6 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
65.7%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property JIS G4105 SCM420 UNI 11234 100Cr6
Standard JIS G4105:1979 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.18–0.23 0.93-1.05
Si (%) 0.15–0.35 0.15-0.35
Mn (%) 0.60–0.90 0.25-0.45
Cr (%) 0.90–1.20 1.35-1.65
Mo (%) 0.15–0.30 Not specified
P (%) Not specified <=0.025
S (%) Not specified <=0.025
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4105 SCM420 UNI 11234 100Cr6
Tensile Strength ≥830 MPa 750-1000 MPa
Case Hardness HRC 58–62 Not specified
Core Hardness HB 235–293 Not specified
Yield Strength Not specified 400-600 MPa
Elongation Not specified 10-14 %
Hardness Not specified 60-64 HRC
Typical Applications
JIS G4105 SCM420
Case hardened gears, cams, pins, shafts
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can JIS G4105 SCM420 Be Substituted With UNI 11234 100Cr6?
JIS G4105 SCM420 and UNI 11234 100Cr6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
JIS G4105 SCM420
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4800–6400 mm (188.98–251.97 in)
UNI 11234 100Cr6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5700–6800 mm (224.41–267.72 in)
On M-EX Right Now
JIS G4105 SCM420
3 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4105 SCM420 and UNI 11234 100Cr6?
JIS G4105 SCM420 specifies Mo which is not specified for UNI 11234 100Cr6. UNI 11234 100Cr6 specifies P, S which are not specified for JIS G4105 SCM420.
Can JIS G4105 SCM420 be substituted with UNI 11234 100Cr6?
JIS G4105 SCM420 and UNI 11234 100Cr6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.