17CrNiMo6, Material Number: 1.6587 Case Hardening Steels
PRODUCT DESCRIPTION
17CrNiMo6 is a high-strength steel with excellent toughness, weldability, and machinability, used in automotive, aerospace, and heavy machinery for high-stress components.PRODUCT TYPES
- Hot Rolling, Forged and Peeled Steels between 30 mm and 980 mm.
17CrNiMo6: Overview
17CrNiMo6 is a high-strength, low-alloy steel primarily used in the production of high-performance mechanical components. It is particularly known for its ability to withstand high stresses and temperatures, as well as its toughness and durability. It is commonly used in industries such as automotive, machinery, and aerospace.
Chemical Composition (in %)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.17 – 0.22 |
| Silicon (Si) | 0.40 max |
| Manganese (Mn) | 0.50 – 0.80 |
| Phosphorus (P) | 0.025 max |
| Sulfur (S) | 0.025 max |
| Chromium (Cr) | 1.40 – 1.70 |
| Nickel (Ni) | 1.40 – 1.80 |
| Molybdenum (Mo) | 0.15 – 0.30 |
| Copper (Cu) | 0.25 max |
Mechanical Properties
- Density: 7.85 g/cm³ (or 7850 kg/m³)
- Tensile Strength (Rm): 930–1080 MPa
- Yield Strength (Rp0.2): 780 MPa (min)
- Elongation (A): ≥ 10% (for thickness up to 20 mm)
- Hardness (HB): 200–235
Machinability
17CrNiMo6 is known for its good machinability, especially in the hardened and tempered state. Its relatively low carbon content ensures it can be easily processed into complex parts with good surface finish. The steel exhibits good hardness and toughness after heat treatment, making it suitable for machining operations such as turning, milling, and drilling.
Tips for Machining:
- Use carbide tools for better wear resistance.
- Utilize medium to high cutting speeds to prevent tool damage.
- Apply cutting fluids to improve the quality of the surface finish and tool life.
Weldability
17CrNiMo6 exhibits good weldability with proper techniques, although it may require preheating for thicker sections to prevent cracking. The steel’s alloy composition makes it suitable for welding, but care must be taken with heat control to avoid distortion and ensure strength in the welds.
Welding Guidelines:
- Preheating is recommended for sections thicker than 30 mm.
- Use low-hydrogen electrodes for better welding quality.
- Post-weld heat treatment may be required to relieve residual stresses and enhance mechanical properties.
Usage Areas
17CrNiMo6 is mainly used in applications that require high strength and toughness, especially where parts are subjected to heavy loads and high operational stresses. Typical applications include:
- Automotive Industry: Gearboxes, drive shafts, and axle shafts.
- Aerospace Industry: Aircraft landing gear and structural components.
- Machine Building: High-stress components such as crankshafts and connecting rods.
- Heavy Equipment: Gear wheels and other mechanical components requiring strength and resistance to wear.
- Tool Manufacturing: Components that need to withstand high torque and stress during operation.
Industries Using 17CrNiMo6 Steel
- Automotive Industry: Components such as gears, drives, and shafts for transmissions.
- Aerospace: High-stress components, including landing gear and structural parts.
- Energy Sector: Components for turbines and compressors.
- Machine Construction: Parts such as crankshafts, camshafts, and drive shafts.
- Heavy Equipment: High-stress structural components for cranes, excavators, and similar machinery.
Key Advantages of 17CrNiMo6
- High Tensile and Yield Strength: Ideal for load-bearing applications under stress.
- Good Toughness: Retains impact resistance even at low temperatures.
- Good Weldability: Can be welded with suitable techniques for high-strength joints.
- High Hardness: After heat treatment, it can achieve hardness levels suitable for wear-resistant applications.
- Versatility: Suitable for a wide range of industrial applications, especially in automotive, aerospace, and machinery sectors.