ASTM A790/A790M S32101 Introduce
Despite its superior properties, ASTM A790/A790M S32101 duplex stainless steel has some limitations. Its high chromium content makes it susceptible to sensitization, which can reduce its resistance to most acidic environments. This can be mitigated with a post weld heat treatment, which is recommended for welded components. In addition, its thermal conductivity is lower than other stainless steels, making it suitable for applications where high temperatures are not required.
Smelting temperature:1288°C - 1193°C
Application:Seamless and welded ferritic/austenitic stainless steel tube
ASTM A790/A790M S32101 Material Chemical Composition
The chemical composition of the ASTM A790/A790M S32101 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0400 |
| Nickel (Ni) | 1.3500 | 1.7000 |
| Nitrogen (N) | 0.2000 | 0.2500 |
| Molybdenum (Mo) | 0.1000 | 0.8000 |
| Manganese (Mn) | 4.0000 | 6.0000 |
| Copper (Cu) | 0.1000 | 0.8000 |
| Chromium (Cr) | 21.0000 | 22.0000 |
| Carbon (C) | - | 0.0400 |
ASTM A790/A790M S32101 Material Mechanical Properties
ASTM A790/A790M S32101 is a special type of austenitic duplex stainless steel with a combination of properties that make it useful for many different applications. The alloy contains a balance of chromium and nickel, as well as small amounts of molybdenum, nitrogen, and other elements. This combination of elements gives it excellent weldability, corrosion resistance, thermal properties, and mechanical properties, making it suitable for many different applications.
The mechanical properties of the ASTM A790/A790M S32101 steel are as follows:
| YieldRp0.2 | ≤ 494 (MPa) |
| TeileRm | ≤ 763 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 241 |
ASTM A790/A790M S32101 Material Thermal Properties
The thermal performance parameters of the ASTM A790/A790M S32101 steel are as follows:
| Temperature (°C) | 43 | 342 | 343 |
| Modulus of elasticity (GPa) | - | 491 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 244 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 414 |
| Poisson’s coefficient, ν | - | - | 411 |
ASTM A790/A790M S32101 Material Machining Technology
The choice of feed and speed is important when machining ASTM A790/A790M S32101 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.