20CrNiMoA Alloy Steel Round Bar with Polished Surface and OD 6-630mm for Structural Applications
Price:
US $850-1,250 / Ton
MOQ:
1 Ton
Delivery Time:
Negotiable
Product Description
SNCM220 20CrNiMo Structural Alloy Steel Round Bar
SAE 8620H Alloy Round Bar is a high-quality structural alloy steel manufactured according to Chinese Standard A50202. This low carbon nickel chromium molybdenum alloy offers excellent carburized properties, superior formability, and reliable weldability.
Key Features
- Excellent machinability performance
- Superior cold strain plasticity
- Reliable weldability
- High hardenability without fragility after tempering
International Standards Equivalents
| Chinese (GB) | American (AISI) | German (DIN) | Japanese (JIS) |
|---|---|---|---|
| 20CrNiMo | SAE 8620 | 1.6523 | / |
Chemical Composition
| Element | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
|---|---|---|---|---|---|---|---|---|---|
| Content (%) | 0.17-0.23 | 0.17-0.37 | 0.6-0.95 | ≤0.035 | ≤0.035 | 0.4-0.7 | 0.20-0.30 | ≤0.30 | / |
Mechanical Properties
| Property | Value |
|---|---|
| Quenching Temperature | 850°C (oil cooled) |
| Tempering | 200°C (air cooled) |
| Tensile Strength (σb) | ≥980 MPa (100) |
| Yield Strength (σs) | ≥785 MPa (80) |
| Elongation (δ5) | ≥9% |
| Reduction of Area (ψ) | ≥40% |
| Impact Energy (Akv) | ≥47 J |
Applications
Widely used in transmission systems, tractor motors, and small to medium automotive components. Serves as an alternative to 12CrNi3 for high-class carburization and cyanide carburizing parts including oil drilling equipment, mining claws, and cones. Commonly specified for carburized gears, pinions, shafts, bearings, piston rings, ring gears, and crankshafts.
Available Stock Sizes
Round Bar Diameter: 12-380mm
Available in various conditions: pre-hardened, hot rolled, annealed, quenched and tempered
Surface conditions: black, pre-machined, grinding, and polish
Available in various conditions: pre-hardened, hot rolled, annealed, quenched and tempered
Surface conditions: black, pre-machined, grinding, and polish
Why Choose Our Alloy Steel Products
Quality Assurance
We source materials exclusively from government-owned steel mills to ensure consistent quality and reliability in every product we supply.
Timely Delivery
We prioritize every order with efficient processing and logistics to ensure your materials arrive when you need them, whether raw or finished with machining/heat treatment.
Quality Commitment
Our ISO 9001 certified quality management system undergoes regular audits and continuous improvement to meet the highest industry standards.
Comprehensive Services
We provide specialty steel for all industries with value-added services including metal cutting, sizing, machining (blanking, milling, grinding), heat treatment, and custom sawing for any quantity.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben