EN 10084 1.6660 Introduce
EN 10084 1.6660 steel can be heat treated to achieve desired properties. Generally, it is heat treated at temperatures ranging from 750-950°C for 1-2 hours. This process is known as normalizing and it is usually followed by a tempering operation. During the tempering process, the steel is cooled slowly to remove retained austenite and also to increase the toughness of the steel.
Smelting temperature:1553°C - 1677°C
Application:Case hardening steels - Technical delivery conditions
EN 10084 1.6660 Material Chemical Composition
The chemical composition of the EN 10084 1.6660 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.4000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0250 |
| Nickel (Ni) | 3.0000 | 3.5000 |
| Molybdenum (Mo) | 0.3000 | 0.5000 |
| Manganese (Mn) | 0.3000 | 0.6000 |
| Chromium (Cr) | 0.8000 | 1.2000 |
| Carbon (C) | 0.1700 | 0.2200 |
EN 10084 1.6660 Material Mechanical Properties
The mechanical properties of the EN 10084 1.6660 steel are as follows:
| YieldRp0.2 | ≤ 654 (MPa) |
| TeileRm | ≤ 537 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 141 |
EN 10084 1.6660 Material Thermal Properties
The thermal performance parameters of the EN 10084 1.6660 steel are as follows:
| Temperature (°C) | 34 | 431 | 782 |
| Modulus of elasticity (GPa) | - | 832 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 431 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 214 |
| Poisson’s coefficient, ν | - | - | 432 |