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GB/T 3077 20CrMo vs SAE J404 4135

Close Alternative — 81.6% match based on chemical composition and mechanical property overlap.

GB/T 3077 20CrMo (GB/T 3077:2015) and SAE J404 4135 (SAE J404:2000) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 20CrMo is typically used for used for gears, shafts, axles, transmission parts, fasteners, and machine components., while SAE J404 4135 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. GB/T 3077 20CrMo is defined under Guobiao Standards (GB/T), originating from China, while SAE J404 4135 is defined under SAE International, originating from United States.

As per chemical composition, GB/T 3077 20CrMo vs SAE J404 4135 is a 81.6% 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 81.6%.

Frequently Compared With GB/T 3077 20CrMo:
UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A NF A35-565 100C6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
81.6%
MECHANICAL MATCH
No shared data
OVERALL
81.6%
Specifications
Property GB/T 3077 20CrMo SAE J404 4135
Standard GB/T 3077:2015 SAE J404:2000
Category Alloy Steel Alloy Steel
C (%) 0.17-0.24 0.33-0.38
Si (%) 0.17-0.37 0.15-0.35
Mn (%) 0.40-0.70 0.70-0.90
Cr (%) 0.80-1.10 0.80-1.10
Mo (%) 0.15-0.25 0.15-0.25
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.040
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 20CrMo SAE J404 4135
Tensile Strength >=885 MPa Not specified
Yield Strength >=685 MPa Not specified
Elongation >=12% Not specified
Hardness <=197 HB Not specified
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 20CrMo
Used for gears, shafts, axles, transmission parts, fasteners, and machine components.
SAE J404 4135
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can GB/T 3077 20CrMo Be Substituted With SAE J404 4135?
GB/T 3077 20CrMo and SAE J404 4135 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
GB/T 3077 20CrMo
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4800–5200 mm (188.98–204.72 in)
SAE J404 4135
No active listings currently.
On M-EX Right Now
GB/T 3077 20CrMo
2 active listings and RFQs →
SAE J404 4135
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 20CrMo and SAE J404 4135?
GB/T 3077 20CrMo specifies Cu which is not specified for SAE J404 4135.
Can GB/T 3077 20CrMo be substituted with SAE J404 4135?
GB/T 3077 20CrMo and SAE J404 4135 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.