39NiCrMo3 Alloy Steel, Material Number: 1.6510
PRODUCT DESCRIPTION
39NiCrMo3 (1.6510) is a high-strength, chromium-nickel-molybdenum alloy steel, known for its excellent toughness, high fatigue resistance, and good machinability. Ideal for automotive, aerospace, and engineering applications.PRODUCT TYPES
Overview of 39NiCrMo3, 1.6510 Alloy Steel
39NiCrMo3 (1.6510) is a low-alloy steel containing chromium, nickel, and molybdenum. This alloy offers high strength, exceptional fatigue resistance, and good hardenability, making it ideal for components that are exposed to high stress, such as gears, shafts, and structural parts. It also has good toughness and can withstand impact loading.
This steel is widely used in industries that require high-performance materials, such as automotive, aerospace, and heavy engineering applications. It is known for its ability to retain mechanical properties at elevated temperatures and under heavy load conditions.
Chemical Composition (in %)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.36 – 0.44 |
| Silicon (Si) | 0.10 – 0.35 |
| Manganese (Mn) | 0.40 – 0.70 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Chromium (Cr) | 0.80 – 1.10 |
| Nickel (Ni) | 1.20 – 1.50 |
| Molybdenum (Mo) | 0.15 – 0.30 |
Mechanical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Tensile Strength | 850 – 1050 MPa |
| Yield Strength | 650 – 850 MPa |
| Elongation (A) | ≥ 12% |
| Hardness (HB) | 220 – 280 |
Machinability
39NiCrMo3 offers excellent machinability in the annealed state. It can be effectively machined using conventional tools such as turning, drilling, and milling. Post-heat treatment, the material can become harder, requiring the use of carbide tools or high-speed steel (HSS) for machining.
Machining Tips:
- Use carbide tools or HSS for best results.
- Avoid high cutting speeds to minimize tool wear.
- Apply lubrication and cooling to extend tool life during machining.
Weldability
39NiCrMo3 offers good weldability with proper precautions. Preheating is generally not necessary for sections up to 30 mm thick, but for thicker sections, preheating is recommended. Post-weld heat treatment may be required to relieve residual stresses and maintain material properties in thicker sections.
Welding Tips:
- Preheat sections thicker than 30 mm.
- Use low-hydrogen electrodes to reduce cracking risks.
- Post-weld heat treatment is essential for stress relief in thicker sections.
Applications
- Automotive components (e.g., gears, shafts, axles)
- Aerospace parts (e.g., structural components)
- Heavy engineering and machinery parts
- High-performance engineering components
Heat Treatment
- Annealing: To improve machinability and reduce internal stresses.
- Quenching and Tempering: To enhance strength, hardness, and wear resistance.
Advantages
- High tensile strength and excellent wear resistance.
- Good fatigue resistance for high-stress applications.
- Excellent machinability in the annealed condition.
- Retains toughness under impact and cyclic loading conditions.