- Excellent case hardening (carburizing) performance
- High core toughness with wear-resistant surface
- Good machinability and formability
- Excellent fatigue and impact resistance
- Reliable heat treatment response
- Suitable for high-load transmission components
8620 alloy steel round bar
SAE 8620 Alloy Steel Round Bar is a low alloy nickel-chromium-molybdenum case hardening steel widely used for components requiring a hard wear-resistant surface combined with a tough and ductile core. This makes SAE 8620 steel bar an ideal material for high-performance engineering parts exposed to friction, shock loading, and continuous mechanical stress.
8620 alloy steel is commonly supplied in the form of 8620 round bar, forged bar, and machined components. As a carburizing steel, 8620 steel is designed for heat treatment processes that significantly improve surface hardness while maintaining excellent core toughness.
Compared with standard carbon steels, 8620 alloy steel round bar offers superior hardenability, better fatigue resistance, and improved wear performance, making it a preferred material for gears, shafts, and transmission systems in automotive and industrial applications.
Key Features
- Excellent case hardening (carburizing) performance
- High core toughness with wear-resistant surface
- Good machinability and formability
- Excellent fatigue and impact resistance
- Reliable heat treatment response
- Suitable for high-load transmission components
Chemical Composition (Typical)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.18 – 0.23 |
| Nickel (Ni) | 0.40 – 0.70 |
| Chromium (Cr) | 0.40 – 0.60 |
| Molybdenum (Mo) | 0.15 – 0.25 |
| Manganese (Mn) | 0.70 – 0.90 |
| Silicon (Si) | 0.15 – 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Typical Value |
| Tensile Strength | 700–900 MPa |
| Yield Strength | ≥ 400 MPa |
| Elongation | ≥ 15% |
| Surface Hardness (After Carburizing) | 58–62 HRC |
| Density | 7.85 g/cm³ |
| Heat Treatment | Carburized, quenched & tempered |
Available Sizes & Specifications
SAE 8620 steel bar is available in a wide range of sizes and processing conditions.
- Product Form: Round Bar, Forged Bar, Flat Bar
- Diameter Range: 10 mm – 600 mm
- Length: Random Length, Fixed Length, Cut-to-Size
- Surface Finish: Black, Peeled, Bright, Ground
- Heat Treatment: Annealed, Carburized, Quenched & Tempered
- Standard: ASTM A29 / SAE J404
Custom machining and special dimensions are available upon request.
Applications of 8620 Alloy Steel
SAE 8620 carburizing steel is widely used in industries requiring strong wear-resistant surfaces combined with tough cores.
Automotive Industry
- Gears and pinions
- Transmission shafts
- Differential components
- Camshafts
Mechanical Engineering
- High-strength shafts
- Bushings and sleeves
- Couplings and connectors
- Machine drive systems
Oil & Gas Industry
- Rotating equipment components
- High-load mechanical parts
- Drilling system components
Industrial Manufacturing
- Gear systems
- Power transmission components
- Heavy-duty industrial machinery parts
Benefits of SAE 8620 Steel
Compared with standard alloy steels, SAE 8620 steel provides:
- Excellent carburizing and surface hardening capability
- Improved wear resistance in demanding applications
- Strong and tough core structure
- High fatigue resistance under cyclic loading
- Long service life in mechanical systems
- Reliable performance in gear and shaft applications
Why Choose Our 8620 Alloy Steel?
- Strict quality control and material testing
- Stable chemical composition and performance
- Factory-direct competitive pricing
- Custom cutting and machining services
- Fast international delivery
- Full mill test certificate (MTC) provided
Packaging & Delivery
- Export-standard seaworthy packaging
- Anti-rust oil protection
- Wooden crate or steel bundle packaging
- Safe global logistics support
Request a Quote
Looking for a reliable SAE 8620 alloy steel supplier or manufacturer? Contact us today for pricing, technical specifications, and customized solutions.
Request a fast quote now for premium 8620 alloy steel round bar and steel bar products.
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
View more Alloy Steel Products
High-Strength 9260 Alloy Steel Round Bar
34CrNiMo6 Alloy Steel round bar EN1.6582
