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AISI 5140 vs GB/T 3077 12Cr2Ni4A

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

AISI 5140 and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. AISI 5140 is typically used for used for gears, shafts, spindles, bolts, machinery parts, and automotive components., while GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. AISI 5140 is defined under AISI, originating from United States, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, AISI 5140 vs GB/T 3077 12Cr2Ni4A is a 65.6% match. As per mechanical properties, the match is 8.9%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With AISI 5140:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
65.6%
MECHANICAL MATCH
8.9%
OVERALL
35%
Specifications
Property AISI 5140 GB/T 3077 12Cr2Ni4A
Standard AISI GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.10-0.15
Mn (%) 0.70-0.90 0.30-0.60
Si (%) 0.15-0.35 0.17-0.37
Cr (%) 0.70-0.90 1.25-1.65
P (%) 0.035 max 0.025 max
S (%) 0.040 max 0.025 max
Ni (%) Not specified 3.25-3.75
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property AISI 5140 GB/T 3077 12Cr2Ni4A
Condition Quenched & Tempered Not specified
Tensile Strength 850-1000 MPa 980-1180 MPa
Yield Strength 650-800 MPa 785-980 MPa
Elongation 12-18% 10-14%
Hardness 240-300 HB 58-62 HRC (case)
Typical Applications
AISI 5140
Used for gears, shafts, spindles, bolts, machinery parts, and automotive components.
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can AISI 5140 Be Substituted With GB/T 3077 12Cr2Ni4A?
AISI 5140 and GB/T 3077 12Cr2Ni4A 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
AISI 5140
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6400–6700 mm (251.97–263.78 in)
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
AISI 5140
2 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI 5140 and GB/T 3077 12Cr2Ni4A?
GB/T 3077 12Cr2Ni4A specifies Ni which is not specified for AISI 5140.
Can AISI 5140 be substituted with GB/T 3077 12Cr2Ni4A?
AISI 5140 and GB/T 3077 12Cr2Ni4A 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.