ASTM A790/A790M A790 S32750 Introduce
ASTM A790/A790M A790 S32750 duplex stainless steel is an excellent material choice for demanding applications where strength and corrosion resistance are paramount. It offers superior strength, ductility and corrosion resistance. In addition, its superior mechanical properties make it suitable for high pressure vessel applications and provide excellent resistance to pitting and crevice corrosion. Despite its benefits, its susceptibility to sensitization and its lower thermal conductivity present some restrictions.
Smelting temperature:1275°C - 1383°C
Application:Seamless and welded ferritic/austenitic stainless steel tube
ASTM A790/A790M A790 S32750 Material Mechanical Properties
Fatigue life is an important characteristic for materials used in applications where frequent load and cycle variations can occur. This includes industries such as aerospace and automotive engineering. Steel that has been manufactured in accordance to the ASTM A790/A790M A790 S32750 standard has shown excellent fatigue properties. It has shown superior fatigue life compared to other steel alloys when subjected to variable loads and cyclic conditions.
The mechanical properties of the ASTM A790/A790M A790 S32750 steel are as follows:
| YieldRp0.2 | ≤ 114 (MPa) |
| TeileRm | ≤ 768 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 443 |
ASTM A790/A790M A790 S32750 Material Thermal Properties
The thermal performance parameters of the ASTM A790/A790M A790 S32750 steel are as follows:
| Temperature (°C) | 24 | 898 | 335 |
| Modulus of elasticity (GPa) | - | 577 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 222 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 422 |
| Poisson’s coefficient, ν | - | - | 131 |
ASTM A790/A790M A790 S32750 Material Machining Technology
The use of coolants can be beneficial when machining ASTM A790/A790M A790 S32750 steel. Coolants help to reduce the tool wear by keeping the heat generated during the machining process under control. Additionally, the use of a coolant will reduce the time required for the machining process and increase overall accuracy and precision. A water-based coolant is usually recommended, as it will reduce the risk of fire when machining and also extend the life of the cutting tools.