SAE 8620 Alloy Steel Round Bar with High Hardenability, Good Weldability, and Cold Strain Plasticity
Price:
US $720-1,350 / Ton
MOQ:
1 Ton
Delivery Time:
Negotiable
Product Description
Alloy AISI SAE 8620 Steel 1.6523 21NiCrMo2 Sncm220 Round Bar
SAE 8620H alloy steel round bar is a low carbon nickel chromium molybdenum alloy with excellent carburizing properties, formability, and weldability. This widely used carburizing alloy offers high strength case and core toughness, supported by chromium and molybdenum for superior surface hardness and wear resistance.
Key Features
- Excellent machinability performance
- Superior cold strain plasticity
- Good weldability characteristics
- High hardenability properties
International Standards Equivalents
| Designation | Brand Name | Ravne No. | Mat. No. | DIN | EN | AISI |
|---|---|---|---|---|---|---|
| 20NCD2 | 769 | 1.6523 | 21NiCrMo2 | 20NiCrMo2 | 8620 | 8620 |
Chemical Composition (Weight %)
| C | Si | Mn | Cr | Mo | Ni | V | W | Others |
|---|---|---|---|---|---|---|---|---|
| 0.20 | max. 0.40 | 0.80 | 0.53 | 0.20 | 0.55 | - | - | - |
Detailed Specifications
20NCD2 is a hardenable chromium, molybdenum, nickel low alloy steel specifically designed for carburizing applications to develop case-hardened components with excellent wear characteristics.
Primary Applications
Gears, shafts, bearings, piston rings, ring gears, crankshafts, and other applications requiring a hard carburized case with a tough core. Widely used in transmission systems, tractor motors, and automotive components.
Physical Properties
| Property | Value |
|---|---|
| Modulus of Elasticity | 210 x 10³ N/mm² |
| Density | 7.86 g/cm³ |
Heat Treatment Guidelines
| Treatment | Temperature | Cooling |
|---|---|---|
| Case Hardening | 880-980°C | Oil (water), hot bath 160-250°C |
| Carburizing | 880-980°C | Oil (water), hot bath 160-250°C |
| Direct Hardening | 880-980°C | Oil, hot bath 160-250°C |
| Core Refining | 860-900°C / 780-820°C | Oil, hot bath 160-250°C |
| Tempering | 150-200°C | Air |
Available Stock Sizes
Round bar diameters: 12-380mm
Available in various conditions including pre-hardened, hot rolled, annealed, quenched and tempered, with surface conditions ranging from black, pre-machined, grinding, to polished finishes.
Quality Assurance
We source materials exclusively from government-owned steel mills to ensure consistent quality. Our ISO 9001 certified quality management system guarantees competitive products that meet demanding specifications.
Value-Added Services
- Metal cutting and sizing
- Machining (blanking, milling, grinding)
- Heat treatment services
- Sawing for small or large quantities
- Sawing-to-size capabilities
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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