ASTM A249/A249M Type XM-15 Introduce
ASTM A249/A249M Type XM-15 is an austenitic stainless steel specifically designed for use in boiler, superheater and heat exchanger tubes, which contain higher amounts of chromium and nickel compared to other stainless steels. This grade of steel is popular for its ability to resist corrosion and oxidation, and for its high strength-to-weight ratio. Due to its outstanding properties, it is ideal for a range of applications, such as pressure vessels, heat exchangers, and condensers.
Smelting temperature:1523°C - 1158°C
Application:Welded austenitic steel tubes for boilers, superheaters, heat exchangers and condensers
ASTM A249/A249M Type XM-15 Material Mechanical Properties
Hardness is a measure of how resistant a material is to being indented or scratched. The hardness of ASTM A249/A249M Type XM-15 steel typically ranges from 90 to 270 HRB, depending on the grade of steel and the desired characteristics. The higher the hardness, the greater the steel's resistance to being indented or scratched.
The mechanical properties of the ASTM A249/A249M Type XM-15 steel are as follows:
| YieldRp0.2 | ≤ 544 (MPa) |
| TeileRm | ≤ 437 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 14% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 231 |
ASTM A249/A249M Type XM-15 Material Thermal Properties
The thermal performance parameters of the ASTM A249/A249M Type XM-15 steel are as follows:
| Temperature (°C) | 34 | 866 | 571 |
| Modulus of elasticity (GPa) | - | 423 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 413 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 224 |
| Poisson’s coefficient, ν | - | - | 132 |
ASTM A249/A249M Type XM-15 Material Machining Technology
Machining is an essential process used in the fabrication of ASTM A249/A249M Type XM-15 steel. With its superior mechanical properties, ASTM A249/A249M Type XM-15 is one of the leading materials for many industrial and consumer product applications. ASTM A249/A249M Type XM-15 steel is used in a wide range of industries and has many advantages when it comes to machining due to its toughness, strength, and durability. Understanding the differences between machining ASTM A249/A249M Type XM-15 steel and machining other materials is key to successful applications.