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Polished Surface SAE 8620H Alloy Steel Round Bar with High Hardenability and Good Weldability
Product Details
| Model NO. | SAE8620H | Surface Treatment | Polished |
|---|---|---|---|
| Specification | OD 6-630mm | Production Capacity | 500tons |
| Chemical Composition C | 0.20 | Chemical Composition Si | Max. 0.40 |
| Chemical Composition Mn | 0.80 | Chemical Composition Cr | 0.53 |
| Chemical Composition Mo | 0.20 | Chemical Composition Ni | 0.55 |
| Modulus Of Elasticity | 210 X 10^3 N/mm2 | Density | 7.86 G/cm3 |
| Tensile Strength | ≥980 MPa | Yield Strength | ≥785 MPa |
| Elongation | ≥9% | ||
| Highlight | Polished Surface Alloy Steel Round Bar,High Hardenability SAE 8620 Round Bar,Good Weldability 8620H Steel Bar |
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Product Description
SAE8620H Alloy Solid Round Bar
SAE 8620 is an alloy construction steel with high hardenability, excellent machinability, cold strain plasticity, and good weldability. This low carbon nickel chromium molybdenum alloy offers superior carburized properties, formability, and weldability, making it the most widely used carburizing alloy.
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 | - | - | - |
Mechanical Properties
Quenching Temperature: 850°C (oil cooled)
Tempering: 200°C (air cooled)
| Property | Value |
|---|---|
| Tensile Strength σb (MPa) | ≥980(100) |
| Yield Strength σs (MPa) | ≥785(80) |
| Elongation δ5 (%) | ≥9 |
| Reduction of Area ψ (%) | ≥40 |
| Akv (J) | ≥47 |
Physical Properties
Modulus of Elasticity: 210 × 10³ N/mm²
Density: 7.86 g/cm³
Heat Treatment Specifications
| 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 | Oil, hot bath 160-250°C |
| Core Refining | 780-820°C | Oil, hot bath 160-250°C |
| Tempering | 150-200°C | Air |
Applications
Widely used in transmission systems, tractor motors, and small-to-medium automotive applications. Ideal for gears, shafts, bearings, piston rings, ring gears, crankshafts, and other components requiring hard carburized cases with tough cores.
Available Sizes
Round Bar Diameter: 12-380mm
Available in various conditions: pre-hardened, hot rolled, annealed, quenched and tempered, with surface conditions including black, pre-machined, grinding, and polish.
Quality Assurance & Services
Our Commitment
We source materials exclusively from certified steel manufacturers 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
Delivery & Support
We prioritize speedy and timely delivery for all orders, whether raw materials or finished products with machining or heat treatment. Our extensive inventory and efficient logistics ensure shortest possible lead times.
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