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GB/T 3077 40CrNiMoA vs UNI 11234 100Cr6

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

GB/T 3077 40CrNiMoA (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 40CrNiMoA is typically used for used for crankshafts, turbine shafts, heavy-duty gears, aircraft landing parts, bolts, and pressure components., while UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. GB/T 3077 40CrNiMoA 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 40CrNiMoA vs UNI 11234 100Cr6 is a 59% match. As per mechanical properties, the match is 25%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 3077 40CrNiMoA:
GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
59%
MECHANICAL MATCH
25%
OVERALL
35%
Specifications
Property GB/T 3077 40CrNiMoA UNI 11234 100Cr6
Standard GB/T 3077-2015 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.37-0.44 0.93-1.05
Si (%) 0.17-0.37 0.15-0.35
Mn (%) 0.50-0.80 0.25-0.45
Cr (%) 0.60-0.90 1.35-1.65
Ni (%) 1.25-1.65 Not specified
Mo (%) 0.15-0.25 Not specified
P (%) 0.025 max <=0.025
S (%) 0.025 max <=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 GB/T 3077 40CrNiMoA UNI 11234 100Cr6
Tensile Strength 1080-1280 MPa 750-1000 MPa
Yield Strength 930-1080 MPa 400-600 MPa
Elongation 10-14% 10-14 %
Hardness 30-38 HRC 60-64 HRC
Typical Applications
GB/T 3077 40CrNiMoA
Used for crankshafts, turbine shafts, heavy-duty gears, aircraft landing parts, bolts, and pressure components.
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can GB/T 3077 40CrNiMoA Be Substituted With UNI 11234 100Cr6?
GB/T 3077 40CrNiMoA 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 40CrNiMoA
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4200–7000 mm (165.35–275.59 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 40CrNiMoA
2 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 40CrNiMoA and UNI 11234 100Cr6?
GB/T 3077 40CrNiMoA specifies Ni, Mo which are not specified for UNI 11234 100Cr6.
Can GB/T 3077 40CrNiMoA be substituted with UNI 11234 100Cr6?
GB/T 3077 40CrNiMoA 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.