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GB/T 3077 25MnTiBRE vs GB/T 3077 20MnTiB

Close Alternative — 71.6% match based on chemical composition and mechanical property overlap.

GB/T 3077 25MnTiBRE (GB/T 3077:2015) and GB/T 3077 20MnTiB (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 25MnTiBRE is typically used for hot-rolled or forged structural alloy steel bars, while GB/T 3077 20MnTiB is commonly used for hot-rolled or forged structural alloy steel bars. GB/T 3077 25MnTiBRE is defined under Guobiao Standards (GB/T), originating from China, while GB/T 3077 20MnTiB is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 3077 25MnTiBRE vs GB/T 3077 20MnTiB is a 90.7% match. As per mechanical properties, the match is 33.3%. Combined, this makes them a close alternative overall at 71.6%.

Frequently Compared With GB/T 3077 25MnTiBRE:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
90.7%
MECHANICAL MATCH
33.3%
OVERALL
71.6%
Specifications
Property GB/T 3077 25MnTiBRE GB/T 3077 20MnTiB
Standard GB/T 3077:2015 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.22-0.28 0.17-0.24
Si (%) 0.20-0.45 0.17-0.37
Mn (%) 1.30-1.60 1.30-1.60
B (%) 0.0008-0.0035 0.0008-0.0035
Ti (%) 0.04-0.10 0.04-0.10
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 25MnTiBRE GB/T 3077 20MnTiB
Tensile Strength >=1380 MPa >=1130 MPa
Elongation >=10% >=10%
Hardness <=229 HB <=187 HB
Condition Quenched and tempered, test sample Specimen (size not stated); hardness is for bars delivered annealed or high temperature tempered Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Yield Strength Not specified >=930 MPa
Typical Applications
GB/T 3077 25MnTiBRE
Hot-rolled or forged structural alloy steel bars
GB/T 3077 20MnTiB
Hot-rolled or forged structural alloy steel bars
Can GB/T 3077 25MnTiBRE Be Substituted With GB/T 3077 20MnTiB?
GB/T 3077 25MnTiBRE and GB/T 3077 20MnTiB 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 25MnTiBRE
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GB/T 3077 20MnTiB
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Frequently Asked Questions
What is the difference between GB/T 3077 25MnTiBRE and GB/T 3077 20MnTiB?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 25MnTiBRE be substituted with GB/T 3077 20MnTiB?
GB/T 3077 25MnTiBRE and GB/T 3077 20MnTiB 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.