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GB/T 3077 20CrNiMo vs UNI 11234 100Cr6

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

GB/T 3077 20CrNiMo (GB/T 3077:2015) and UNI 11234 100Cr6 (UNI 11234:2007) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 20CrNiMo is typically used for used for carburized gears, shafts, heavy-duty pinions, gearbox components, couplings, and bearings., while UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. GB/T 3077 20CrNiMo is defined under Guobiao Standards (GB/T), originating from China, while UNI 11234 100Cr6 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy.

As per chemical composition, GB/T 3077 20CrNiMo vs UNI 11234 100Cr6 is a 55.6% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 3077 20CrNiMo:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
55.6%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 3077 20CrNiMo UNI 11234 100Cr6
Standard GB/T 3077:2015 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.93-1.05
Si (%) 0.17-0.37 0.15-0.35
Mn (%) 0.60-0.95 0.25-0.45
Cr (%) 0.40-0.70 1.35-1.65
Mo (%) 0.20-0.30 Not specified
Ni (%) 0.35-0.75 Not specified
P (%) <=0.030 <=0.025
S (%) <=0.030 <=0.025
Cu (%) <=0.30 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 GB/T 3077 20CrNiMo UNI 11234 100Cr6
Tensile Strength >=980 MPa 750-1000 MPa
Yield Strength >=785 MPa 400-600 MPa
Elongation >=9% 10-14 %
Hardness <=197 HB 60-64 HRC
Condition Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 20CrNiMo
Used for carburized gears, shafts, heavy-duty pinions, gearbox components, couplings, and bearings.
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can GB/T 3077 20CrNiMo Be Substituted With UNI 11234 100Cr6?
GB/T 3077 20CrNiMo 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
GB/T 3077 20CrNiMo
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4600–7000 mm (181.1–275.59 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
GB/T 3077 20CrNiMo
2 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 20CrNiMo and UNI 11234 100Cr6?
GB/T 3077 20CrNiMo specifies Mo, Ni, Cu which are not specified for UNI 11234 100Cr6.
Can GB/T 3077 20CrNiMo be substituted with UNI 11234 100Cr6?
GB/T 3077 20CrNiMo 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.