GB/T 20878 022Cr25Ni22Mo2N Introduce
The superior mechanical strength of GB/T 20878 022Cr25Ni22Mo2N stainless steel makes it suitable for various industrial, mechanical and structural applications. Its excellent thermo-mechanical properties, combined with its good creep strength and resistance to aggressive acids, make this alloy ideal for producing parts for high temperature applications, energy and power systems, medical equipment, and automotive components. Additionally, its low coefficient of thermal expansion gives it superior formability and lets it be welded easily and with minimal distortion.
Smelting temperature:1769°C - 1827°C
Application:Stainless steel and heat resistant steel grades and chemical composition
GB/T 20878 022Cr25Ni22Mo2N Material Chemical Composition
The chemical composition of the GB/T 20878 022Cr25Ni22Mo2N steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | 0.0900 | 0.1500 |
| Molybdenum (Mo) | 1.6000 | 2.6000 |
| Chromium (Cr) | 24.0000 | 26.0000 |
| Nickel (Ni) | 20.5000 | 23.5000 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0300 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | - | 0.0200 |
GB/T 20878 022Cr25Ni22Mo2N Material Mechanical Properties
The ductility of GB/T 20878 022Cr25Ni22Mo2N steel is another key factor to consider. Its ductility is typically dependent on the grade, with higher grades having lower ductility and vice versa. The ultimate elongation of GB/T 20878 022Cr25Ni22Mo2N steel can range from 20% to 40%.
The mechanical properties of the GB/T 20878 022Cr25Ni22Mo2N steel are as follows:
| YieldRp0.2 | ≤ 464 (MPa) |
| TeileRm | ≤ 288 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 123 |
GB/T 20878 022Cr25Ni22Mo2N Material Thermal Properties
The thermal performance parameters of the GB/T 20878 022Cr25Ni22Mo2N steel are as follows:
| Temperature (°C) | 34 | 525 | 213 |
| Modulus of elasticity (GPa) | - | 993 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 214 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 414 |
| Poisson’s coefficient, ν | - | - | 111 |
GB/T 20878 022Cr25Ni22Mo2N Material Machining Technology
The machining of GB/T 20878 022Cr25Ni22Mo2N steel requires specific cutting tools. A wide range of cutting tools such as drills, taps, reamers, and end mills can be used with this material. Drills are usually used to create the initial hole and are then followed by the tap. Reamers are often used to deburr and the finish off the hole. End mills are used to create more complicated shapes and profiles in the material.