ASTM A841/A841M A841 Grade F Class 8 Introduce
The quenched and tempered steel plate of ASTM A841/A841M A841 Grade F Class 8 is used in a range of applications, but is primarily designed to be used in petroleum and natural gas industries, in applications where elevated mechanical properties are required. Such applications include pressure vessels, power generation, and offshore oil and gas production. Additionally, these steel plates can also be used for safety related equipment and components, as well as for liquefied petroleum tanks and other kinds of fluid tanks.
Smelting temperature:1817°C - 1252°C
Application:Steel plate processed by temperature mechanical control process for pressure vessels
ASTM A841/A841M A841 Grade F Class 8 Material Chemical Composition
The chemical composition of the ASTM A841/A841M A841 Grade F Class 8 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Tungsten (W) | 5.7000 | 6.7000 |
| Vanadium (V) | 2.7000 | 3.2000 |
| Silicon (Si) | - | 0.4500 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.2500 |
| Molybdenum (Mo) | 4.7000 | 5.3000 |
| Manganese (Mn) | - | 0.4000 |
| Copper (Cu) | - | 0.2500 |
| Chromium (Cr) | 3.8000 | 4.5000 |
| Cobalt (Co) | 8.0000 | 8.8000 |
| Carbon (C) | 1.2300 | 1.3300 |
ASTM A841/A841M A841 Grade F Class 8 Material Mechanical Properties
ASTM A841/A841M A841 Grade F Class 8 is a high-strength steel that is ideal for use in large-scale components, such as pressure vessels. The steel has exceptional forming and machinability properties, and its high strength values make it suitable for applications that require a lot of strength. It also possesses excellent weldability, allowing it to be used in a wide range of heavy-duty applications. The steel's remarkable mechanical properties have been derived from its combination of alloying elements and heat-treatment processes, and must be closely examined to ensure that its components perform optimally. By understanding the various mechanical properties of ASTM A841/A841M A841 Grade F Class 8 steel, engineers and designers can make informed decisions about which steel grade is best for their specific application.
The mechanical properties of the ASTM A841/A841M A841 Grade F Class 8 steel are as follows:
| YieldRp0.2 | ≤ 216 (MPa) |
| TeileRm | ≤ 756 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 343 |
ASTM A841/A841M A841 Grade F Class 8 Material Thermal Properties
The thermal performance parameters of the ASTM A841/A841M A841 Grade F Class 8 steel are as follows:
| Temperature (°C) | 44 | 533 | 156 |
| Modulus of elasticity (GPa) | - | 182 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 21 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 444 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 222 |
| Poisson’s coefficient, ν | - | - | 211 |
ASTM A841/A841M A841 Grade F Class 8 Material Machining Technology
ASTM A841/A841M A841 Grade F Class 8 steel has good machinability properties due to its combination of alloying elements, which helps to prevent tool build-up and heat build-up during machining operations. The low levels of sulfur in the steel also assist in its machinability. This steel can be machined with conventional high-speed steel cutting tools, however, a coating should be applied to the cutting edge to prevent rapid tool wear.