JIS G4805 18CrNiMo7-6 Introduce
JIS G4805 18CrNiMo7-6 is one of the most commonly used steels in the world. It is widely used in a variety of applications ranging from consumer goods to large-scale construction projects. This steel is known for its exceptional strength, durability, and chemical properties. JIS G4805 18CrNiMo7-6 steel is an iron-based alloy containing a variety of alloying elements, including chromium, nickel, molybdenum and vanadium.
Smelting temperature:1993°C - 1432°C
Application:High carbon chromium bearing steel
JIS G4805 18CrNiMo7-6 Material Chemical Composition
The chemical composition of the JIS G4805 18CrNiMo7-6 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.4000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | 1.4000 | 1.7000 |
| Molybdenum (Mo) | 0.2500 | 0.3500 |
| Manganese (Mn) | 0.3500 | 0.6500 |
| Chromium (Cr) | 1.5000 | 1.8000 |
| Carbon (C) | 0.1500 | 0.2100 |
JIS G4805 18CrNiMo7-6 Material Mechanical Properties
The mechanical properties of the JIS G4805 18CrNiMo7-6 steel are as follows:
| YieldRp0.2 | ≤ 664 (MPa) |
| TeileRm | ≤ 993 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 42% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 123 |
JIS G4805 18CrNiMo7-6 Material Thermal Properties
The thermal performance parameters of the JIS G4805 18CrNiMo7-6 steel are as follows:
| Temperature (°C) | 22 | 691 | 313 |
| Modulus of elasticity (GPa) | - | 179 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 413 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 233 |