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20CrNiMoA Steel Round Bar with Polished Surface and OD 6-630mm Hot Rolled Alloy Steel Bar
Product Details
| Model Number | 20CrNiMoA | Surface Treatment | Polished |
|---|---|---|---|
| Diameter Range | OD 6-630mm | Chemical Composition C | 0.17-0.23 |
| Chemical Composition Si | 0.17-0.37 | Chemical Composition Mn | 0.6-0.95 |
| Chemical Composition P | ≤0.035 | Chemical Composition S | ≤0.035 |
| Chemical Composition Cr | 0.4-0.7 | Chemical Composition Mo | 0.20-0.30 |
| Tensile Strength | ≥980 MPa | Yield Strength | ≥785 MPa |
| Elongation | ≥9% | Reduction Area | ≥40% |
| Impact Energy | ≥47 J | ||
| Highlight | 20CrNiMoA Steel Round Bar,Polished Surface Alloy Steel Bar,OD 6-630mm Hot Rolled Steel Rod |
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Product Description
20CrNiMoA SAE8620H Steel Round Rod / Hot Rolled Alloy Bar
SAE 8620 is an alloy construction steel according to Chinese Standard (Code: A50202). This steel round bar offers high hardenability without fragility after tempering, excellent weldability, superior machinability, and cold strain plasticity.
HR 8620 steel bar is a low carbon nickel chromium molybdenum alloy with exceptional carburized properties, formability, and weldability. As the most widely used carburizing alloy, this cost-effective grade provides high strength case and core toughness due to its nickel content, while chromium and molybdenum support carburizing for excellent surface hardness and wear resistance.
Key Features
- Excellent machinability performance
- Superior cold strain plasticity
- Outstanding weldability
- High hardenability
International Standards Equivalents
| Chinese | American | German | Japanese |
|---|---|---|---|
| GB 20CrNiMo | SAE8620 | 1.6523 | / |
Chemical Composition
| Grades | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
|---|---|---|---|---|---|---|---|---|---|
| 20CrNiMo | 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) |
| Tempering | 200°C (air) |
| Tensile Strength σb (MPa) | ≥980(100) |
| Yield Strength σs (MPa) | ≥785(80) |
| Elongation δ5 (%) | ≥9 |
| Reduction of Area ψ (%) | ≥40 |
| Akv (J) | ≥47 |
General Applications
Widely used in transmission systems, tractor motors, and small to medium automotive applications. Serves as an alternative to 12CrNi3 for higher-class carburization and cyanide carburizing parts including oil drilling equipment, mining claws, and cones.
Commonly utilized for carburized gears, pinions, shafts, bearings, piston rings, ring gears, crankshafts, and other critical components.
Available Stock Sizes
| Product Form | Diameter Range |
|---|---|
| Round Bar | 12-380mm |
Available Sizes and Conditions
Our steel materials are available in various sizes and conditions tailored to customer requirements, including round bars, flat bars, plates, and blocks. Material conditions range from pre-hardened, hot rolled, annealed, quenched and tempered to various surface finishes including black, pre-machined, grinding, and polished.
Why Choose Our 20CrNiMoA Steel?
Quality Assurance from Government-Owned Steel Mills
We meticulously source materials exclusively from reputable steel manufacturers to ensure consistent quality in all our steel products. Our commitment to providing best-in-class products at competitive prices has earned us customer trust for over two decades.
Speedy and Timely Delivery
We prioritize every business transaction, ensuring timely delivery of both raw materials and finished products with machining or heat treatment. We strive to fulfill your purchase orders with the shortest possible lead times.
Quality Commitment
Our ISO 9001 certified quality management system undergoes continuous improvement and regular audits to meet customer demands and quality considerations, ensuring competitive and reliable products.
Our Services
We provide quality special steel for all industries with orders of any size or length. Our unique inventory of specialty steel is complemented by value-adding services including metal cutting, sizing, machining (blanking, milling, grinding), heat treatment, sawing for small or large quantities, and sawing-to-size, all supported by excellent customer service.
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