JIS G4805 20NiCrMo2 Introduce
JIS G4805 20NiCrMo2 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 20NiCrMo2 steel is an iron-based alloy containing a variety of alloying elements, including chromium, nickel, molybdenum and vanadium.
Smelting temperature:1573°C - 1684°C
Application:High carbon chromium bearing steel
JIS G4805 20NiCrMo2 Material Chemical Composition
The chemical composition of the JIS G4805 20NiCrMo2 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.4000 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | 0.4000 | 0.7000 |
| Molybdenum (Mo) | 0.1500 | 0.2500 |
| Manganese (Mn) | 0.6500 | 0.9500 |
| Chromium (Cr) | 0.3000 | 0.6500 |
| Carbon (C) | 0.1700 | 0.2300 |
| Silicon (Si) | - | 0.4000 |
| Sulfur (S) | - | 0.0150 |
| PhOsphorus (P) | - | 0.0250 |
| Manganese (Mn) | 0.6000 | 0.9500 |
| Chromium (Cr) | 0.3500 | 0.6500 |
JIS G4805 20NiCrMo2 Material Mechanical Properties
The mechanical properties of the JIS G4805 20NiCrMo2 steel are as follows:
| YieldRp0.2 | ≤ 459 (MPa) |
| TeileRm | ≤ 229 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 113 |
JIS G4805 20NiCrMo2 Material Thermal Properties
The thermal performance parameters of the JIS G4805 20NiCrMo2 steel are as follows:
| Temperature (°C) | 11 | 977 | 339 |
| Modulus of elasticity (GPa) | - | 462 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 113 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 212 |
| Poisson’s coefficient, ν | - | - | 312 |