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GB/T 3077 12Cr2Ni4A vs SAE J404 50B46

Related Material — 66% match based on chemical composition and mechanical property overlap.

GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) and SAE J404 50B46 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 12Cr2Ni4A is typically used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components., while SAE J404 50B46 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China, while SAE J404 50B46 is defined under SAE International, originating from United States.

As per chemical composition, GB/T 3077 12Cr2Ni4A vs SAE J404 50B46 is a 66% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 66%.

Frequently Compared With GB/T 3077 12Cr2Ni4A:
NF A35-565 100C6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 12Cr9Mo10H IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 7) 12Cr2Mo5V2H UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6
Match Breakdown
CHEMISTRY MATCH
66%
MECHANICAL MATCH
No shared data
OVERALL
66%
Specifications
Property GB/T 3077 12Cr2Ni4A SAE J404 50B46
Standard GB/T 3077-2015 SAE J404:2009
Category Alloy Steel Alloy Steel
C (%) 0.10-0.15 0.44-0.49
Si (%) 0.17-0.37 0.15-0.35
Mn (%) 0.30-0.60 0.75-1.00
Cr (%) 1.25-1.65 0.20-0.35
Ni (%) 3.25-3.75 0.20-0.35
P (%) 0.025 max <=0.030
S (%) 0.025 max <=0.040
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 12Cr2Ni4A SAE J404 50B46
Tensile Strength 980-1180 MPa Not specified
Yield Strength 785-980 MPa Not specified
Elongation 10-14% Not specified
Hardness 58-62 HRC (case) Not specified
Typical Applications
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
SAE J404 50B46
Chemistry-only alloy steel grade; see the composition notes for product scope
Can GB/T 3077 12Cr2Ni4A Be Substituted With SAE J404 50B46?
GB/T 3077 12Cr2Ni4A and SAE J404 50B46 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 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
SAE J404 50B46
No active listings currently.
On M-EX Right Now
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
SAE J404 50B46
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 12Cr2Ni4A and SAE J404 50B46?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 12Cr2Ni4A be substituted with SAE J404 50B46?
GB/T 3077 12Cr2Ni4A and SAE J404 50B46 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.