ASTM A240/A240M 321 Introduce
The ASTM A240/A240M 321 steel is an incredibly versatile and economical metal that has been used in numerous industrial applications. It is suitable for a wide range of applications due to its unique properties which provide it with high strength and good corrosion resistance. It is also extremely ductile and malleable, which allows it to be easily formed into the desired shape and size. The ASTM A240/A240M 321 steel is available in various grades, sizes and shapes, making it an ideal choice for a wide range of industrial and construction applications.
Smelting temperature:1545°C - 1742°C
Application:Heat-resistant chrome and chrome-nickel stainless steel sheets, sheets and strips for pressure vessels
ASTM A240/A240M 321 Material Chemical Composition
The chemical composition of the ASTM A240/A240M 321 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | - | 0.1000 |
| Nickel (Ni) | 9.0000 | 12.0000 |
| Chromium (Cr) | 17.0000 | 19.0000 |
| PhOsphorus (P) | - | 0.0450 |
| Sulfur (S) | - | 0.0300 |
| Manganese (Mn) | - | 2.0000 |
| Silicon (Si) | - | 0.7500 |
| Carbon (C) | - | 0.0800 |
ASTM A240/A240M 321 Material Mechanical Properties
Tensile strength is a measure of the mechanical strength of a material and is often expressed in terms of pounds per square inch (psi). This is the maximum force a substance can withstand before it breaks or tears. ASTM A240/A240M 321 steel typically has a tensile strength of about 55,000 psi and can be strengthened further by heat treatments, such as quenching and tempering.
The mechanical properties of the ASTM A240/A240M 321 steel are as follows:
| YieldRp0.2 | ≤ 883 (MPa) |
| TeileRm | ≤ 558 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 444 |
ASTM A240/A240M 321 Material Thermal Properties
The thermal performance parameters of the ASTM A240/A240M 321 steel are as follows:
| Temperature (°C) | 44 | 139 | 276 |
| Modulus of elasticity (GPa) | - | 124 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 233 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 144 |
| Poisson’s coefficient, ν | - | - | 123 |
ASTM A240/A240M 321 Material Machining Technology
The ideal cutting tools for machining ASTM A240/A240M 321 steel are carbide-tipped cutting tools due to their hardness and durability. These tools are designed to provide excellent chip clearance and minimal chatter when machining stainless steel.