40MnCr5 / 1.5913 Medium Carbon Alloy Steel, EN 10083-3 Chromium-Manganese Steel
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Description
40MnCr5 Alloy Steel – Premium Medium-Carbon Engineering Steel
40MnCr5 Alloy Steel is a versatile medium-carbon engineering steel renowned for its exceptional combination of toughness, wear resistance, and strength. This grade complies with the EN 10083-3 standard and is widely utilized across various industrial sectors for manufacturing critical components that demand reliable performance under demanding conditions.
Overview of 40MnCr5 Alloy Steel
40MnCr5 is a heat-treatable chromium-manganese alloy steel specifically engineered for applications requiring superior mechanical properties. Its balanced chemical composition delivers an optimal combination of strength, ductility, and wear resistance, making it an ideal choice for components subjected to high stress and cyclic loading.
The grade is commonly employed in the production of essential engineering components including gears, shafts, crankshafts, connecting rods, and various automotive transmission parts. Its excellent hardenability and response to heat treatment allow manufacturers to achieve precise mechanical properties tailored to specific application requirements.
Related Grades: We also offer 45MnCr5 Alloy Steel for applications requiring slightly different property profiles.
Chemical Composition of 40MnCr5 Steel
The precise chemical formulation of 40MnCr5 alloy steel contributes to its outstanding performance characteristics:
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.36 – 0.44 |
| Manganese (Mn) | 0.60 – 0.90 |
| Chromium (Cr) | 0.80 – 1.10 |
| Silicon (Si) | ≤ 0.40 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.035 |
Mechanical Properties of 40MnCr5 Alloy Steel
The mechanical properties of 40MnCr5 make it a preferred choice for demanding engineering applications:
Key Property Highlights
- Hardness (After Heat Treatment): Can achieve up to 55 HRC (Rockwell Hardness), providing excellent wear resistance for high-friction applications.
- Tensile Strength: Approximately 850 – 1100 MPa (after quenching and tempering), ensuring structural integrity under heavy loads.
- Yield Strength: Approximately 600 MPa, offering reliable performance under sustained stress.
- Wear Resistance: Enhanced by chromium content, significantly extending component service life in abrasive environments.
- Machinability: Good machinability in the softened condition, facilitating efficient manufacturing processes.
- Weldability: Moderate weldability requiring proper preheating to prevent cracking and ensure joint integrity.
Property Summary Table
| Property | Value |
|---|---|
| Hardness (after heat treatment) | Up to 55 HRC |
| Tensile Strength (quenched & tempered) | 850 – 1100 MPa |
| Yield Strength | ~600 MPa |
| Wear Resistance | Good (due to Cr content) |
| Weldability | Moderate (requires preheating) |
| Machinability | Good (in softened condition) |
Heat Treatment Guide for 40MnCr5
Proper heat treatment is essential to achieve the desired mechanical properties in 40MnCr5 steel. The following processes are recommended:
Normalizing
Heat the material to 850 – 880°C, followed by air cooling. This process refines the grain structure and improves machinability for subsequent operations.
Hardening
Heat to 820 – 860°C and quench in oil or water. This process transforms the microstructure to martensite, achieving high hardness and strength.
Tempering
Perform tempering at 540 – 680°C to adjust the hardness and toughness balance, achieving the specific mechanical properties required for your application.
Applications of 40MnCr5 Alloy Steel
40MnCr5 is extensively used across multiple industries due to its versatile properties. Common applications include:
- Automotive Industry: Gears, transmission shafts, crankshafts, camshafts, and connecting rods
- Heavy Machinery: Axles, pinions, and high-stress mechanical components
- Industrial Equipment: Gearboxes, drive shafts, and power transmission elements
- General Engineering: High-strength fasteners, mechanical parts, and structural components
Equivalent and Alternative Grades
40MnCr5 corresponds to several internationally recognized standards:
- EN 10083-3: 40MnCr5
- Werkstoff Number: 1.5913
- AISI/SAE: Comparable to 5140 (with slight variations)
- DIN: 40MnCr5
- GB/T (China): 40MnCr
We also offer 45MnCr5 and other related alloy steels for applications with specific property requirements.
Why Choose Milano Special Steel for 40MnCr5?
- Premium Quality: Every batch undergoes rigorous testing to meet international specifications.
- Competitive Pricing: Best-in-market rates without compromising on quality.
- Nationwide Delivery: Seamless supply across all major Indian industrial hubs.
- Technical Expertise: Professional guidance on material selection and heat treatment optimization.
- 50+ Years of Trust: Established in 1972 with a proven track record of excellence.
Contact Us
For inquiries, price quotations, or technical consultation on 40MnCr5 and other alloy steels:
- Email: info@milanospecialsteel.com
- Websites:
- Locations: Gurugram, Kundli, Sonipat, Manesar, Bawal, Bhiwadi, Dharuhera, Faridabad, Ghaziabad, Noida, Maharashtra, Bihar, West Bengal, Punjab, Gujarat, Bangalore, Pune, Surat.
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