- Excellent case hardening (carburizing) performance
- High surface hardness after heat treatment
- Strong and tough core structure
- Good machinability and processing performance
- Excellent wear and fatigue resistance
- Reliable dimensional stability during heat treatment
20MnCr5 Alloy Steel Bar EN 1.7147
20MnCr5 Alloy Steel Bar is a low-alloy carburizing steel widely used in automotive and mechanical engineering applications requiring a hard wear-resistant surface combined with a tough and ductile core. Also known as EN 1.7147 steel, 20MnCr5 alloy steel is designed for case hardening processes that significantly enhance surface hardness while maintaining excellent core strength.
20MnCr5 steel bar is commonly supplied as 20MnCr5 round bar, forged bar, and machined components. Due to its excellent carburizing response, 20MnCr5 alloy steel is widely used for gears, shafts, pinions, and transmission components in automotive and industrial machinery.
Compared with standard carbon steels, 20MnCr5 steel offers improved wear resistance, higher fatigue strength, and better hardenability after heat treatment, making it a preferred material for precision mechanical parts.
Key Features
- Excellent case hardening (carburizing) performance
- High surface hardness after heat treatment
- Strong and tough core structure
- Good machinability and processing performance
- Excellent wear and fatigue resistance
- Reliable dimensional stability during heat treatment
Chemical Composition (Typical)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.17 – 0.22 |
| Manganese (Mn) | 1.10 – 1.40 |
| Chromium (Cr) | 0.80 – 1.10 |
| Silicon (Si) | ≤ 0.40 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.035 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Typical Value |
| Tensile Strength | 800–1100 MPa |
| Yield Strength | ≥ 550 MPa |
| Elongation | ≥ 10% |
| Surface Hardness (After Carburizing) | 58–62 HRC |
| Density | 7.85 g/cm³ |
| Heat Treatment | Carburized, quenched & tempered |
Available Sizes & Specifications
20MnCr5 steel bar is available in a wide range of sizes and processing conditions.
- Product Form: Round Bar, Forged Bar, Flat Bar, Plate
- 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: EN 10084 / DIN 1.7147
Custom machining and special tolerances are available upon request.
Applications of 20MnCr5 Steel
20MnCr5 alloy steel is widely used in industries requiring case-hardened components with high wear resistance and strong core toughness.
Automotive Industry
- Transmission gears
- Pinions
- Drive shafts
- Differential components
Mechanical Engineering
- Wear-resistant shafts
- Bushings and sleeves
- Couplings and connectors
- Machine transmission parts
Industrial Manufacturing
- Gear systems
- Precision mechanical parts
- High-load structural components
Heavy Equipment
- Industrial machinery components
- Power transmission systems
- Load-bearing mechanical parts
Benefits of 20MnCr5 Alloy Steel
Compared with standard engineering steels, 20MnCr5 steel provides:
- Excellent surface hardness after carburizing
- Improved wear resistance and fatigue strength
- Strong core toughness for impact loads
- Better heat-treatment response
- Long service life in mechanical systems
- Reliable performance in gear applications
Why Choose Our 20MnCr5 Steel?
- Strict quality inspection and testing
- Stable chemical composition control
- Factory-direct competitive pricing
- Custom cutting and machining services
- Fast global delivery capability
- Full mill test certificate (MTC) available
Packaging & Delivery
- Export-standard seaworthy packaging
- Anti-rust protective oil coating
- Wooden crate or steel bundle packaging
- Safe international logistics support
Request a Quote
Looking for a reliable 20MnCr5 steel supplier or manufacturer? Contact us today for pricing, technical specifications, and customized solutions.
Request a fast quote now for premium 20MnCr5 alloy steel round bar and steel bar products.
Email: sales@hengyimetal.com
WhatsApp: +86 19521258704
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