ASTM A249/A249M S30815 Introduce
ASTM A249/A249M S30815 is a type of steel referred to as a welded austenitic steel boiler and super heater tubes. It is a carbon steel alloy primarily composed of chromium and nickel, and may also include other elements such as copper and molybdenum. The mechanical properties of ASTM A249/A249M S30815 are remarkable, making it a popular choice for many components in various industries, such as plumbing, heating, and cooling systems.
Smelting temperature:1598°C - 1432°C
Application:Welded austenitic steel tubes for boilers, superheaters, heat exchangers and condensers
ASTM A249/A249M S30815 Material Mechanical Properties
Corrosion resistance is a measure of how resistant a material is to corrosion or rusting. ASTM A249/A249M S30815 steel has excellent resistance to corrosion and can withstand exposure to most chemicals, such as acids, alkalis, and other corrosive substances.
The mechanical properties of the ASTM A249/A249M S30815 steel are as follows:
| YieldRp0.2 | ≤ 184 (MPa) |
| TeileRm | ≤ 128 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 421 |
ASTM A249/A249M S30815 Material Thermal Properties
The thermal performance parameters of the ASTM A249/A249M S30815 steel are as follows:
| Temperature (°C) | 43 | 964 | 418 |
| Modulus of elasticity (GPa) | - | 731 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 133 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 211 |
| Poisson’s coefficient, ν | - | - | 123 |
ASTM A249/A249M S30815 Material Machining Technology
When it comes to machining ASTM A249/A249M S30815 steel, there are several guidelines that should be followed to ensure optimal results. First and foremost, the cutting tool material should be of a high grade. ASTM A249/A249M S30815 steel is extremely hard and can cause excessive wear and tear on lower-grade cutting tools. Second, the cutting speed should be carefully chosen. High cutting speeds can be used to reduce forces during machining; however, they can also reduce tool life. Therefore, it is essential to find the correct balance between cutting speed and tool life. Third, heavy-duty cutting fluids should be used during the machining process to ensure optimal results. The fluids should be capable of lubricating the material and preventing build-up of heat, which can cause the tool to lose its edge quickly.