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GB/T 3077 20CrMnTi vs GB/T 3077 25CrMnSi

Close Alternative — 74.7% match based on chemical composition and mechanical property overlap.

GB/T 3077 20CrMnTi (GB/T 3077:2015) and GB/T 3077 25CrMnSi (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 20CrMnTi is typically used for gears, transmission shafts, pinions, carburized components, automotive parts, while GB/T 3077 25CrMnSi is commonly used for hot-rolled or forged structural alloy steel bars. GB/T 3077 20CrMnTi is defined under Guobiao Standards (GB/T), originating from China, while GB/T 3077 25CrMnSi is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 3077 20CrMnTi vs GB/T 3077 25CrMnSi is a 74.5% match. As per mechanical properties, the match is 75%. Combined, this makes them a close alternative overall at 74.7%.

Frequently Compared With GB/T 3077 20CrMnTi:
NF A35-565 100C6 GOST 4543 12HN3A UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
74.5%
MECHANICAL MATCH
75%
OVERALL
74.7%
Specifications
Property GB/T 3077 20CrMnTi GB/T 3077 25CrMnSi
Standard GB/T 3077:2015 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.22-0.28
Si (%) 0.17-0.37 0.90-1.20
Mn (%) 0.80-1.10 0.80-1.10
Cr (%) 1.00-1.30 0.80-1.10
Ti (%) 0.04-0.10 Not specified
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 20CrMnTi GB/T 3077 25CrMnSi
Tensile Strength >=1080 MPa >=1080 MPa
Yield Strength >=850 MPa >=885 MPa
Elongation >=10% >=10%
Hardness <=217 HB <=217 HB
Condition Quenched and tempered, test sample 15 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 20CrMnTi
gears, transmission shafts, pinions, carburized components, automotive parts
GB/T 3077 25CrMnSi
Hot-rolled or forged structural alloy steel bars
Key Differences
Can GB/T 3077 20CrMnTi Be Substituted With GB/T 3077 25CrMnSi?
GB/T 3077 20CrMnTi and GB/T 3077 25CrMnSi 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 20CrMnTi
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5500–6000 mm (216.54–236.22 in)
GB/T 3077 25CrMnSi
No active listings currently.
On M-EX Right Now
GB/T 3077 20CrMnTi
2 active listings and RFQs →
GB/T 3077 25CrMnSi
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 20CrMnTi and GB/T 3077 25CrMnSi?
GB/T 3077 20CrMnTi specifies Ti which is not specified for GB/T 3077 25CrMnSi.
Can GB/T 3077 20CrMnTi be substituted with GB/T 3077 25CrMnSi?
GB/T 3077 20CrMnTi and GB/T 3077 25CrMnSi 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.