ASME SA-213/SA-213M Grade T7 Introduce
ASME SA-213/SA-213M Grade T7 steel is a type of steel alloy used in engineering and construction applications. It is composed of an alloy of iron, carbon, and other elements and is used to make many mechanical components, such as pipes and pressure vessels. The chemical properties of ASME SA-213/SA-213M Grade T7 steel are important for understanding its behavior in different applications.
Smelting temperature:1418°C - 1612°C
Application:Seamless ferritic and austenitic alloy steel tubes for boilers, superheaters and heat exchangers
ASME SA-213/SA-213M Grade T7 Material Chemical Composition
The chemical composition of the ASME SA-213/SA-213M Grade T7 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.5000 | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Molybdenum (Mo) | 0.4500 | 0.6500 |
| Manganese (Mn) | 0.3000 | 0.6000 |
| Chromium (Cr) | 6.0000 | 8.0000 |
| Carbon (C) | - | 0.1500 |
ASME SA-213/SA-213M Grade T7 Material Mechanical Properties
In order to achieve the desired mechanical properties of ASME SA-213/SA-213M Grade T7 steel, it must undergo several thermal treatments. These treatments often encompass both an annealing process and a tempering process. The annealing process removes stresses that have built up during the hot-working process, The tempering process then increases the mechanical strength of the steel by increasing the amount of energy that the material can absorb before fracturing.
The mechanical properties of the ASME SA-213/SA-213M Grade T7 steel are as follows:
| YieldRp0.2 | ≤ 569 (MPa) |
| TeileRm | ≤ 328 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 121 |
ASME SA-213/SA-213M Grade T7 Material Thermal Properties
The thermal performance parameters of the ASME SA-213/SA-213M Grade T7 steel are as follows:
| Temperature (°C) | 31 | 242 | 192 |
| Modulus of elasticity (GPa) | - | 242 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 121 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 424 |
| Poisson’s coefficient, ν | - | - | 341 |
ASME SA-213/SA-213M Grade T7 Material Machining Technology
The machining of ASME SA-213/SA-213M Grade T7 steel requires the use of high-speed cutting tools, as well as the provision of proper lubrication and cooling. In addition, cutting tools with sharp edges must be used, and the rate of cutting should be adjusted in order to minimize the risk of work hardening. Furthermore, proper grinding or honing of the cutting edges should also be undertaken in order to ensure that the tools remain sharp and can continue to perform optimally. Having knowledge of these machining processes can greatly improve the results of machining ASME SA-213/SA-213M Grade T7 steel.