ASTM A249/A249M S30453 Introduce
ASTM A249/A249M S30453 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:1899°C - 1894°C
Application:Welded austenitic steel tubes for boilers, superheaters, heat exchangers and condensers
ASTM A249/A249M S30453 Material Mechanical Properties
Mechanical properties include requirements for tensile strength, yield strength, hardness, elongation and fatigue limit. Chemical composition requirements range from simple limits on the levels of carbon, manganese and silicon to more complex limits on the levels of chromium, nickel and molybdenum in the steel.
The mechanical properties of the ASTM A249/A249M S30453 steel are as follows:
| YieldRp0.2 | ≤ 999 (MPa) |
| TeileRm | ≤ 146 (MPa) |
| ImpactKV/Ku | 42(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) | 122 |
ASTM A249/A249M S30453 Material Thermal Properties
The thermal performance parameters of the ASTM A249/A249M S30453 steel are as follows:
| Temperature (°C) | 41 | 775 | 174 |
| Modulus of elasticity (GPa) | - | 662 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 112 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 142 |
ASTM A249/A249M S30453 Material Machining Technology
Machining is an essential process used in the fabrication of ASTM A249/A249M S30453 steel. With its superior mechanical properties, ASTM A249/A249M S30453 is one of the leading materials for many industrial and consumer product applications. ASTM A249/A249M S30453 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 S30453 steel and machining other materials is key to successful applications.