1.6566 (17NiCrMo6-4) is a top-quality case-hardening steel that replaces 18NiCrMo5. It is widely used in Europe for its strength and versatility. Ideal for stainless steel pipe fittings. Excellent hardenability and machinability for producing durable mechanical parts such as gears and shafts.
Chemical Composition of 1.6566
| Element | C | Ni | Cr | Mo | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|
| Content (%) | 0.14-0.20 | 1.40-1.70 | 0.60-0.90 | 0.25-0.35 | 0.60-0.90 | 0.15-0.40 | ≤0.025 | ≤0.035 |
What We Do
Material Standards
- UNI EN 10084: 17NiCrMo6-4
- BS Equivalent: 817M17
Core Advantages of 1.6566
Hardened to 58-62 HRC, stainless steel fittings are scratch and abrasion resistant. This durability comes in handy in high wear environments such as industrial machinery or conveyor systems.
It has excellent toughness to absorb sudden shocks and vibrations. Enables crack-free stainless steel tubing, ensuring safety in high-stress applications such as automotive transmissions.
It can be cut and molded smoothly in the annealed state, thus improving efficiency. Accelerates the production of stainless steel fittings and improves accuracy without increasing workload and cost.
Uniform hardening over thick sections maintains strength at all times. This ensures that stainless steel tubes remain strong even in large installations such as heavy piping.
Physical Properties of 1.6566
| Property | Density | Thermal Conductivity | Coefficient of Expansion |
|---|---|---|---|
| Value | 7.85 g/cm³ | 42 W/m·K | 11.5 x 10⁻⁶ /K |
Mechanical Properties of 1.6566
| Property | Tensile Strength (Rm) | Yield Strength (Rp0.2) | Elongation (A) | Surface Hardness |
|---|---|---|---|---|
| Value | 1000-1200 MPa | ≥800 MPa | ≥10% | 58-62 HRC |
Applications in Stainless Steel
- Stainless Steel Pipes: Powers gears and camshafts in machinery.
- Stainless Steel Fittings: Builds durable bushings and pins.
1.6566 vs Others
| Feature | 1.6566 | 1.5752 | 1.7131 | 1.6511 | 1.4980 | 1.4418 |
|---|---|---|---|---|---|---|
| Common Name | 17NiCrMo6-4 | 14NiCr14 | 16MnCr5 | 36CrNiMo4 | X20CrNiMo | X4CrNiMo16-5-1 |
| Steel Type | Case-hardening | Case-hardening | Case-hardening | Alloy Structural | High Alloy | Martensitic |
| Hardenability | Medium-High | High | Medium | High | Moderate | High |
| Surface Hardness | High | High | Moderate | High | Moderate | Very High |
| Corrosion Resistance | Low | Low | Low | Low | High | Very High |
| Machinability | Good | Good | Excellent | Moderate | Moderate | Fair |
| Typical Use | Gears, Shafts | Gears, Pins | Gears, Bolts | Shafts, Gears | Turbine Parts | Valves, Pumps |
| Pipe Application | Fittings | Fittings | Connectors | Heavy Duty | High Temp | Corrosive Duty |
| Standards | UNI EN 10084 | BS 970-1 | DIN 17210 | DIN EN 10083-3 | DIN EN 10088 | EN 10088-3 |
Contact Us
- RM901 No.22 Tangjiaqiao Road Wenzhou China
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
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