GB/T 20878 14Cr17Ni2 Introduce
The superior mechanical strength of GB/T 20878 14Cr17Ni2 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:1918°C - 1379°C
Application:Stainless steel and heat resistant steel grades and chemical composition
GB/T 20878 14Cr17Ni2 Material Chemical Composition
The chemical composition of the GB/T 20878 14Cr17Ni2 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.8000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0400 |
| Nickel (Ni) | 1.5000 | 2.5000 |
| Manganese (Mn) | - | 0.8000 |
| Chromium (Cr) | 16.0000 | 18.0000 |
| Carbon (C) | 0.1100 | 0.1700 |
GB/T 20878 14Cr17Ni2 Material Mechanical Properties
GB/T 20878 14Cr17Ni2 steel is a popular material for construction and engineering projects due to its superior mechanical properties. It has excellent strength-to-weight ratio, good levels of stiffness, ductility, and machinability, as well as excellent corrosion and wear resistance. It is also highly cost-efficient and highly recyclable.
The mechanical properties of the GB/T 20878 14Cr17Ni2 steel are as follows:
| YieldRp0.2 | ≤ 447 (MPa) |
| TeileRm | ≤ 194 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 141 |
GB/T 20878 14Cr17Ni2 Material Thermal Properties
The thermal performance parameters of the GB/T 20878 14Cr17Ni2 steel are as follows:
| Temperature (°C) | 24 | 497 | 466 |
| Modulus of elasticity (GPa) | - | 886 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 213 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 421 |
| Poisson’s coefficient, ν | - | - | 213 |
GB/T 20878 14Cr17Ni2 Material Machining Technology
The type of cutting tool chosen depends on the end-use application and the desired cutting performance. In general, high-speed steel (HSS) or high-speed cobalt (HSC) tools are best for machining GB/T 20878 14Cr17Ni2 steel as they have excellent cutting properties and can cope with high cutting speeds and feeds. Carbide grade tools may be used for high-shear or high-feed applications.