GB/T 20878 16Cr23Ni13 Introduce
GB/T 20878 16Cr23Ni13 stainless steel is a one-piece austenitic chromium-nickel alloy, usually used in applications that require high strength, corrosion and abrasion resistance. It contains chromium, nickel and molybdenum, as well as phosphorus and sulfur, which improve its mechanical properties and resistance to oxidation and corrosion. The addition of molybdenum stabilizes the austenitic structure and increases the alloy's resistance to pitting, crevice corrosion and general corrosion.
Smelting temperature:1453°C - 1151°C
Application:Stainless steel and heat resistant steel grades and chemical composition
GB/T 20878 16Cr23Ni13 Material Chemical Composition
The chemical composition of the GB/T 20878 16Cr23Ni13 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Chromium (Cr) | 22.0000 | 24.0000 |
| Nickel (Ni) | 12.0000 | 15.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 0.7500 |
| Carbon (C) | - | 0.2000 |
| Silicon (Si) | - | 1.0000 |
| PhOsphorus (P) | - | 0.0400 |
GB/T 20878 16Cr23Ni13 Material Mechanical Properties
The strength of GB/T 20878 16Cr23Ni13 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 16Cr23Ni13 steel are as follows:
| YieldRp0.2 | ≤ 532 (MPa) |
| TeileRm | ≤ 283 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 44% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 434 |
GB/T 20878 16Cr23Ni13 Material Thermal Properties
The thermal performance parameters of the GB/T 20878 16Cr23Ni13 steel are as follows:
| Temperature (°C) | 24 | 594 | 359 |
| Modulus of elasticity (GPa) | - | 586 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 123 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 111 |
| Poisson’s coefficient, ν | - | - | 414 |
GB/T 20878 16Cr23Ni13 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 16Cr23Ni13 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.