GB/T 20878 S11168 Introduce
The superior mechanical strength of GB/T 20878 S11168 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:1912°C - 1897°C
Application:Stainless steel and heat resistant steel grades and chemical composition
GB/T 20878 S11168 Material Chemical Composition
The chemical composition of the GB/T 20878 S11168 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | - | 0.6000 |
| Manganese (Mn) | - | 1.0000 |
| Chromium (Cr) | 10.5000 | 11.7000 |
| Carbon (C) | - | 0.0800 |
| Titanium (Ti) | - | 0.7500 |
GB/T 20878 S11168 Material Mechanical Properties
The strength of GB/T 20878 S11168 steel depends on the specific grade and can range from 335MPa to 835MPa. Its tensile strength, or the amount of force it can resist, can range from 435MPa to 1035MPa. The yield strength, which is the amount of force it takes to cause permanent deformation, can range from 355MPa to 785MPa.
The mechanical properties of the GB/T 20878 S11168 steel are as follows:
| YieldRp0.2 | ≤ 521 (MPa) |
| TeileRm | ≤ 126 (MPa) |
| ImpactKV/Ku | 22(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) | 224 |
GB/T 20878 S11168 Material Thermal Properties
The thermal performance parameters of the GB/T 20878 S11168 steel are as follows:
| Temperature (°C) | 22 | 294 | 262 |
| Modulus of elasticity (GPa) | - | 878 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 12.2 |
| Specific thermal capacity (J/kg·°C) | - | 334 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 431 |
| Poisson’s coefficient, ν | - | - | 321 |
GB/T 20878 S11168 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 S11168 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.