DIN 10028-7 X6CrNi25-20 Introduce
The steel industry is one of the largest in the world. It produces materials used in a variety of industries, and its products are used in the construction of buildings, bridges and other structures. Steel standards are the guidelines that dictate the quality and characteristics of steel products that are sold and traded in the market. One such standard is the DIN 10028-7, which describes the requirements for hot-rolled and forged steels used in the manufacture of pressure vessels.
Smelting temperature:1243°C - 1288°C
Application:Flat products made of steels for pressure purposes - part 7: stainless steels
DIN 10028-7 X6CrNi25-20 Material Chemical Composition
The chemical composition of the DIN 10028-7 X6CrNi25-20 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nickel (Ni) | 19.0000 | 22.0000 |
| Chromium (Cr) | 24.0000 | 26.0000 |
| Nitrogen (N) | - | 0.1000 |
| Sulfur (S) | - | 0.0150 |
| PhOsphorus (P) | - | 0.0350 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 0.7000 |
| Carbon (C) | 0.0400 | 0.0800 |
DIN 10028-7 X6CrNi25-20 Material Mechanical Properties
Manganese is used in the alloy to increase hardness, tensile strength and ductility. It also increases the ability of the steel to harden when cooled rapidly, making it useful for applications that require a high level of wear resistance. The amount of manganese in DIN 10028-7 steel varies from 1.0% to 1.2%. Silicon is added to the steel to increase its strength, ductility and toughness. It also reduces the amount of heat-treatment necessary in order to obtain the desired properties. The amount of silicon in DIN 10028-7 steel typically ranges from 0.4% to 0.6%. Phosphorus is added to DIN 10028-7 X6CrNi25-20 steel to improve machinability. It also increases the steel's ability to retain its hardness over time. The phosphorus content of DIN 10028-7 steel typically ranges from 0.04% to 0.04%.
The mechanical properties of the DIN 10028-7 X6CrNi25-20 steel are as follows:
| YieldRp0.2 | ≤ 871 (MPa) |
| TeileRm | ≤ 158 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 444 |
DIN 10028-7 X6CrNi25-20 Material Thermal Properties
The thermal performance parameters of the DIN 10028-7 X6CrNi25-20 steel are as follows:
| Temperature (°C) | 13 | 693 | 883 |
| Modulus of elasticity (GPa) | - | 626 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 411 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 132 |
| Poisson’s coefficient, ν | - | - | 213 |
DIN 10028-7 X6CrNi25-20 Material Machining Technology
DIN 10028-7 X6CrNi25-20 steel is a ferritic stainless steel which is often used as a piping material in industries such as the food, dairy, pharmaceutical and chemical industries. This alloy has a variety of unique mechanical and chemical properties that make it suitable for a number of applications. Steel of this classification is composed of chromium (19-23 wt%), molybdenum (3-5 wt%), nitrogen (0.1-0.5 wt%) and nickel (7-11 wt%). This steel is available in a range of shapes, sizes and grades and is used as a machining material in a number of different industries.