Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of gb 20crmnti alloy carburizing gear steel bar 20mncr5 in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
GB 20CrMnTi Alloy Carburizing Gear Steel Bar (equivalent to European standard 20MnCr5 and corresponding to AISI 5120) is a low-carbon alloy structural steel containing 0.17%–0.23% carbon, 1.00%–1.30% chromium, and 0.04%–0.10% titanium. Refined through vacuum melting and electroslag remelting (ESR) to eliminate inclusions, it achieves a carbide uniformity grade of ≥8 (GB/T 18254). After carburizing and quenching, the surface hardness can reach HRC 58–62, while the core retains toughness in the range of HB 220–260. This makes it ideal for manufacturing gears, shafts, and high-strength structural components requiring excellent wear resistance and fatigue strength.
Similar steel grade & equivalent steel materials:
|
EU EN |
USA - |
Germany DIN,WNr |
Italy UNI |
China GB |
Poland PN |
Russia GOST |
Inter ISO |
|
20MnCr5 (1.7147) |
SAE5120 |
20MnCr5 |
20MnCr5 |
20CrMnTi |
18HGT |
18KHG |
20MnCr5 |
Chemical composition(wt.%)
|
C(%) |
Si(%) |
Mn(%) |
Cr(%) |
Ti(%) |
|
0.17-0.23 |
0.17-0.37 |
0.80-1.10 |
1.00-1.30 |
0.04-0.10 |
Heat treatment:
|
Heat Treatment |
||||
|
Annealing |
Quenching |
Tempering |
Normalizing |
Q&T |
|
√ |
√ |
√ |
√ |
√ |
Mechanical Properties The mechanical properties of annealed GB 20CrMnTi Gearing steel
|
Tensile Mpa |
Yield Mpa |
Bulk modulus Gpa |
Shear modulus Gpa |
Poisson's ratio |
Thermal conductivity W/mK |
|
520 |
415 Min |
140 |
80 |
0.27-0.30 |
46.6 |
Product Range:
|
Dimension |
Process |
Delivery status |
|
Φ18 - 460 mm Length:6M above Can customerzied by every client |
Forging, Hot Rolling and Colding, Cast |
Black, Rough Turning, Shot Blasting |
Standard Specifications: ASTM A29/A29M GB EN 10083/3 JIS G4053 GB GB/T GB/T 3077-1988 Packing
✅ Certifications & Compliance:
Certified to the IATF 16949 automotive quality management system and CE-PED 2014/68/EU Pressure Equipment Directive. Offers original Mill Test Reports (CMTR), carburized case depth inspection reports (ISO 2639), and third-party flaw detection reports (ultrasonic testing sensitivity: Φ2 mm), ensuring full compliance with North American, EU, and Southeast Asian market requirements.
✅ Supply Chain Assurance:
Stocked Specifications:
Round Steel: Φ10 mm–Φ300 mm (tolerance: h11)
Square Steel: 20×20 mm–200×200 mm (straightness ≤ 0.5 mm/m)
Forged Blanks: Customizable to JIS/SKD standard dimensions
Supports 72-hour sample preparation, 30-day delivery for bulk orders, and expedited 7-day production for urgent requirements.
✅ Market Enablement Toolkit:
Offers multilingual technical whitepapers (English, Spanish, Portuguese, Arabic), processing flow diagrams, and competitive performance comparison charts (vs. SAE 8620, 16MnCr5), enabling agents to effectively engage end users.
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