ASTM A790/A790M S31260 Introduce
ASTM A790/A790M S31260 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 S31260 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:1712°C - 1699°C
Application:Seamless and welded ferritic/austenitic stainless steel tube
ASTM A790/A790M S31260 Material Chemical Composition
The chemical composition of the ASTM A790/A790M S31260 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Tungsten (W) | 0.1000 | 0.5000 |
| Silicon (Si) | - | 0.7500 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | 5.5000 | 7.5000 |
| Nitrogen (N) | 0.1000 | 0.3000 |
| Molybdenum (Mo) | 2.5000 | 3.5000 |
| Manganese (Mn) | - | 1.0000 |
| Copper (Cu) | 0.2000 | 0.8000 |
| Chromium (Cr) | 24.0000 | 26.0000 |
| Carbon (C) | - | 0.0300 |
ASTM A790/A790M S31260 Material Mechanical Properties
One of the most important chemical properties of ASTM A790/A790M S31260 is its weldability, which is determined by its chemical composition. ASTM A790/A790M S31260 is a highly weldable alloy due to its combination of alloying elements and the resulting differences in solubility between the two phases. It is also highly resistant to corrosion, which makes it ideal for use in a wide range of applications. The high weldability of the alloy also makes it well suited for use in severe service conditions, such as those found in the oil and gas industry.
The mechanical properties of the ASTM A790/A790M S31260 steel are as follows:
| YieldRp0.2 | ≤ 726 (MPa) |
| TeileRm | ≤ 519 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 214 |
ASTM A790/A790M S31260 Material Thermal Properties
The thermal performance parameters of the ASTM A790/A790M S31260 steel are as follows:
| Temperature (°C) | 11 | 778 | 273 |
| Modulus of elasticity (GPa) | - | 599 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 311 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 442 |
| Poisson’s coefficient, ν | - | - | 314 |
ASTM A790/A790M S31260 Material Machining Technology
The use of coolants can be beneficial when machining ASTM A790/A790M S31260 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.