ASTM A790/A790M S32550 Introduce
ASTM A790/A790M S32550 duplex stainless steel pipe is suitable for most applications due to its combination of high strength and corrosion resistance. Its mechanical properties give it excellent resistance to pitting and crevice corrosion, which is frequently found in harsh environments. Its high strength and creep resistance allows it to withstand high operating temperatures, while its low thermal expansion makes it suitable for high pressure vessel applications.
Smelting temperature:1684°C - 1633°C
Application:Seamless and welded ferritic/austenitic stainless steel tube
ASTM A790/A790M S32550 Material Mechanical Properties
ASTM A790/A790M S32550 steel is an excellent choice of material for a variety of engineering applications. It has excellent mechanical properties, including tensile strength, yield strength and fatigue life, as well as excellent corrosion resistance. It is ideal for use in industries such as aerospace, automotive and marine engineering, as well as for chemical processing, water transport and food processing.
The mechanical properties of the ASTM A790/A790M S32550 steel are as follows:
| YieldRp0.2 | ≤ 727 (MPa) |
| TeileRm | ≤ 499 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 222 |
ASTM A790/A790M S32550 Material Thermal Properties
The thermal performance parameters of the ASTM A790/A790M S32550 steel are as follows:
| Temperature (°C) | 44 | 786 | 782 |
| Modulus of elasticity (GPa) | - | 892 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 333 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 212 |
| Poisson’s coefficient, ν | - | - | 322 |
ASTM A790/A790M S32550 Material Machining Technology
The use of coolants can be beneficial when machining ASTM A790/A790M S32550 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.