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GB/T 3077 50CrNi vs GB/T 3077 45CrNi

Close Alternative — 70.2% match based on chemical composition and mechanical property overlap.

GB/T 3077 50CrNi (GB/T 3077:2015) and GB/T 3077 45CrNi (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 50CrNi is typically used for hot-rolled or forged structural alloy steel bars, while GB/T 3077 45CrNi is commonly used for hot-rolled or forged structural alloy steel bars. GB/T 3077 50CrNi is defined under Guobiao Standards (GB/T), originating from China, while GB/T 3077 45CrNi is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 3077 50CrNi vs GB/T 3077 45CrNi is a 92.9% match. As per mechanical properties, the match is 25%. Combined, this makes them a close alternative overall at 70.2%.

Frequently Compared With GB/T 3077 50CrNi:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6
Match Breakdown
CHEMISTRY MATCH
92.9%
MECHANICAL MATCH
25%
OVERALL
70.2%
Specifications
Property GB/T 3077 50CrNi GB/T 3077 45CrNi
Standard GB/T 3077:2015 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.47-0.54 0.42-0.49
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.50-0.80 0.50-0.80
Cr (%) 0.45-0.75 0.45-0.75
Ni (%) 1.00-1.40 1.00-1.40
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Cu (%) <=0.30 <=0.30
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 50CrNi GB/T 3077 45CrNi
Tensile Strength >=1080 MPa >=980 MPa
Yield Strength >=835 MPa >=785 MPa
Elongation >=8% >=10%
Hardness <=255 HB <=255 HB
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Typical Applications
GB/T 3077 50CrNi
Hot-rolled or forged structural alloy steel bars
GB/T 3077 45CrNi
Hot-rolled or forged structural alloy steel bars
Can GB/T 3077 50CrNi Be Substituted With GB/T 3077 45CrNi?
GB/T 3077 50CrNi and GB/T 3077 45CrNi 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.
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GB/T 3077 50CrNi
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GB/T 3077 45CrNi
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Frequently Asked Questions
What is the difference between GB/T 3077 50CrNi and GB/T 3077 45CrNi?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 50CrNi be substituted with GB/T 3077 45CrNi?
GB/T 3077 50CrNi and GB/T 3077 45CrNi 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.