ASTM A790/A790M S32950 Introduce
ASTM A790/A790M S32950 steel is a type of austenitic duplex stainless steel, a special alloy that has many interesting chemical properties and is used in applications that require high corrosion resistance and high strength. This alloy features a combination of corrosion resistance, ductility, and strength that is advantageous for many different applications. ASTM A790/A790M S32950 steel has been found to be useful in the transport of fluids and gases, the production of power, the manufacture of food packaging, the production of pharmaceuticals, and the production of chemicals.
Smelting temperature:1386°C - 1999°C
Application:Seamless and welded ferritic/austenitic stainless steel tube
ASTM A790/A790M S32950 Material Chemical Composition
The chemical composition of the ASTM A790/A790M S32950 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.6000 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | 3.5000 | 5.2000 |
| Nitrogen (N) | 0.1500 | 0.3500 |
| Molybdenum (Mo) | 1.0000 | 2.5000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 26.0000 | 29.0000 |
| Carbon (C) | - | 0.0300 |
ASTM A790/A790M S32950 Material Mechanical Properties
ASTM A790/A790M S32950 steel has excellent corrosion resistance when exposed to aggressive, corrosive environments. This makes it a valuable choice for applications such as marine structures, chemical processing and food processing. The material is typically resistant to chlorides, sulfates and organic acids, making it suitable for a variety of different industrial environments.
The mechanical properties of the ASTM A790/A790M S32950 steel are as follows:
| YieldRp0.2 | ≤ 121 (MPa) |
| TeileRm | ≤ 575 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 14% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 314 |
ASTM A790/A790M S32950 Material Thermal Properties
The thermal performance parameters of the ASTM A790/A790M S32950 steel are as follows:
| Temperature (°C) | 22 | 936 | 346 |
| Modulus of elasticity (GPa) | - | 589 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 433 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.43 | - | - |
| Deity (kg/dm³) | - | - | 433 |
| Poisson’s coefficient, ν | - | - | 143 |
ASTM A790/A790M S32950 Material Machining Technology
The choice of feed and speed is important when machining ASTM A790/A790M S32950 steel. The feed rate should be in the range of 0.1 to 0.2 mm per rev, depending on the operation and the material to be machined. As for the cutting speed, it should typically be in the range of 500 to 700 m/min for turning operations and 350 to 550 m/min for milling operations. It is important to keep in mind that the cutting speeds may need to be adjusted depending on the depth of the cut, the feed rate, and the type of cutting tool being used.