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GB/T 3077 40MnB vs GB/T 3077 40MnVB

Strong Match — 96.2% match based on chemical composition and mechanical property overlap.

GB/T 3077 40MnB (GB/T 3077:2015) and GB/T 3077 40MnVB (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 40MnB is typically used for hot-rolled or forged structural alloy steel bars, while GB/T 3077 40MnVB is commonly used for hot-rolled or forged structural alloy steel bars. GB/T 3077 40MnB is defined under Guobiao Standards (GB/T), originating from China, while GB/T 3077 40MnVB is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 3077 40MnB vs GB/T 3077 40MnVB is a 94.3% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 96.2%.

Frequently Compared With GB/T 3077 40MnB:
IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 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 IS 1570 (Part 7) 10Cr36Mo10H EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
94.3%
MECHANICAL MATCH
100%
OVERALL
96.2%
Specifications
Property GB/T 3077 40MnB GB/T 3077 40MnVB
Standard GB/T 3077:2015 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.37-0.44 0.37-0.44
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 1.10-1.40 1.10-1.40
B (%) 0.0008-0.0035 0.0008-0.0035
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Cu (%) <=0.30 <=0.30
V (%) Not specified 0.05-0.10
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 40MnB GB/T 3077 40MnVB
Tensile Strength >=980 MPa >=980 MPa
Yield Strength >=785 MPa >=785 MPa
Elongation >=10% >=10%
Hardness <=207 HB <=207 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 40MnB
Hot-rolled or forged structural alloy steel bars
GB/T 3077 40MnVB
Hot-rolled or forged structural alloy steel bars
Key Differences
Can GB/T 3077 40MnB Be Substituted With GB/T 3077 40MnVB?
GB/T 3077 40MnB and GB/T 3077 40MnVB overlap closely enough on chemistry and mechanical properties that GB/T 3077 40MnVB is often considered as a substitute for GB/T 3077 40MnB in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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GB/T 3077 40MnB
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GB/T 3077 40MnVB
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Frequently Asked Questions
What is the difference between GB/T 3077 40MnB and GB/T 3077 40MnVB?
GB/T 3077 40MnVB specifies V which is not specified for GB/T 3077 40MnB.
Can GB/T 3077 40MnB be substituted with GB/T 3077 40MnVB?
GB/T 3077 40MnB and GB/T 3077 40MnVB overlap closely enough on chemistry and mechanical properties that GB/T 3077 40MnVB is often considered as a substitute for GB/T 3077 40MnB in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.