ASTM A240/A240M 2304 Introduce
The ASTM A240/A240M 2304 steel is widely used in a range of products and applications. Some of the common applications include refrigerators, tanks and boilers, pressure vessels, heat exchangers and chemical processing equipment. It is also used in structural and infrastructure projects such as bridges, buildings and other constructions.
Smelting temperature:1219°C - 1963°C
Application:Heat-resistant chrome and chrome-nickel stainless steel sheets, sheets and strips for pressure vessels
ASTM A240/A240M 2304 Material Chemical Composition
The chemical composition of the ASTM A240/A240M 2304 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Nitrogen (N) | 0.0500 | 0.2000 |
| Copper (Cu) | 0.0500 | 0.6000 |
| Molybdenum (Mo) | 0.0500 | 0.0600 |
| Nickel (Ni) | 3.0000 | 5.5000 |
| Chromium (Cr) | 21.5000 | 24.5000 |
| PhOsphorus (P) | - | 0.0400 |
| Sulfur (S) | - | 0.0300 |
| Manganese (Mn) | - | 2.5000 |
| Silicon (Si) | - | 1.0000 |
| Carbon (C) | - | 0.0300 |
ASTM A240/A240M 2304 Material Mechanical Properties
ASTM A240/A240M 2304 steel can be heat-treated through a variety of processes, depending on the desired properties. Annealing is a common heat treatment used to improve the ductility and toughness of the material. This process is done by heating the steel to between 1750 and 2050 degrees Fahrenheit and then slowly cooling it afterward. Other heat treatments include quenching and tempering and stress relieving.
The mechanical properties of the ASTM A240/A240M 2304 steel are as follows:
| YieldRp0.2 | ≤ 871 (MPa) |
| TeileRm | ≤ 816 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 44% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 412 |
ASTM A240/A240M 2304 Material Thermal Properties
The thermal performance parameters of the ASTM A240/A240M 2304 steel are as follows:
| Temperature (°C) | 21 | 538 | 773 |
| Modulus of elasticity (GPa) | - | 653 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 342 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 232 |
| Poisson’s coefficient, ν | - | - | 214 |
ASTM A240/A240M 2304 Material Machining Technology
The ideal cutting tools for machining ASTM A240/A240M 2304 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.