GB/T 20878 06Cr18Ni11Nb Introduce
GB/T 20878 06Cr18Ni11Nb Stainless Steel is a type of austenitic chromium-nickel stainless steel widely used for various industrial and mechanical systems. It is composed mainly of iron, chromium, nickel and molybdenum. Its unique combination of properties provides a number of advantages, including corrosion and abrasion resistance, superior strength and ductility, and excellent thermal conductivity. These properties make it suitable for many industrial and mechanical applications, such as automobile exhaust systems, medical equipment, power plants, and domestic appliances such as refrigerators and washing machines.
Smelting temperature:1813°C - 1428°C
Application:Stainless steel and heat resistant steel grades and chemical composition
GB/T 20878 06Cr18Ni11Nb Material Chemical Composition
The chemical composition of the GB/T 20878 06Cr18Ni11Nb steel are as follows:
| Element | Min | Max |
|---|---|---|
| Niobium (Nb) | 0.8000 | 1.1000 |
| Chromium (Cr) | 17.0000 | 19.0000 |
| Nickel (Ni) | 9.0000 | 12.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 1.0000 |
| Carbon (C) | - | 0.0800 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | 0.8000 | 1.1000 |
| Silicon (Si) | - | 0.7500 |
| Niobium (Nb) | 0.8000 | 1.0000 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 9.0000 | 13.0000 |
| Niobium (Nb) | - | 1.1000 |
| Niobium (Nb) | - | 1.1000 |
| Molybdenum (Mo) | 3.0000 | 4.0000 |
| Niobium (Nb) | - | 1.1000 |
| Niobium (Nb) | - | 1.0000 |
| Niobium (Nb) | - | 1.0000 |
| Niobium (Nb) | - | 1.1000 |
| Niobium (Nb) | - | 1.1000 |
GB/T 20878 06Cr18Ni11Nb Material Mechanical Properties
GB/T 20878 06Cr18Ni11Nb steel has superior mechanical properties compared to ordinary steel. It has an excellent strength-to-weight ratio and good levels of stiffness, ductility, and machinability. Its mechanical properties are largely dependent on the grade, with higher grades having higher strength and lower ductility.
The mechanical properties of the GB/T 20878 06Cr18Ni11Nb steel are as follows:
| YieldRp0.2 | ≤ 446 (MPa) |
| TeileRm | ≤ 841 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 122 |
GB/T 20878 06Cr18Ni11Nb Material Thermal Properties
The thermal performance parameters of the GB/T 20878 06Cr18Ni11Nb steel are as follows:
| Temperature (°C) | 22 | 943 | 546 |
| Modulus of elasticity (GPa) | - | 342 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 421 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.11 | - | - |
| Deity (kg/dm³) | - | - | 132 |
| Poisson’s coefficient, ν | - | - | 231 |
GB/T 20878 06Cr18Ni11Nb Material Machining Technology
The machining of GB/T 20878 06Cr18Ni11Nb steel is an important process in the manufacturing of various mechanical components and industrial products. GB/T 20878 06Cr18Ni11Nb steel is a high-quality alloy steel with a high carbon content, which makes it an excellent choice for machining and fabrication. Its high carbon content also makes it an excellent choice for parts that require strength and durability.