ASTM A841/A841M Grade G Class 9 Introduce
The quenched and tempered steel plate of ASTM A841/A841M Grade G Class 9 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:1153°C - 1163°C
Application:Steel plate processed by temperature mechanical control process for pressure vessels
ASTM A841/A841M Grade G Class 9 Material Chemical Composition
The chemical composition of the ASTM A841/A841M Grade G Class 9 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | - | 0.1300 |
| Manganese (Mn) | 0.6000 | 1.2000 |
| PhOsphorus (P) | - | 0.0150 |
| Sulfur (S) | - | 0.0150 |
| Silicon (Si) | 0.0400 | 0.1500 |
| Nickel (Ni) | 6.0000 | 7.5000 |
| Chromium (Cr) | 0.3000 | 1.0000 |
| Molybdenum (Mo) | - | 0.3000 |
| Aluminum (Al) | 0.0080 | - |
ASTM A841/A841M Grade G Class 9 Material Mechanical Properties
ASTM A841/A841M Grade G Class 9 is a steel that is recognized for its high performance in large scale components, such as pressure vessels and other complex structures. The steel is part of the ASTM A841/A841M Grade G Class 9 family of steel grades, and its mechanical properties are derived from the combination of certain alloying elements and heat-treatment processes. The mechanical properties of ASTM A841/A841M Grade G Class 9 must be thoroughly understood to ensure efficient and reliable operation of the components which are made of this steel. This article will discuss the various mechanical properties of ASTM A841/A841M Grade G Class 9 steel, such as its forming characteristics, ductility, strength, hardness and more.
The mechanical properties of the ASTM A841/A841M Grade G Class 9 steel are as follows:
| YieldRp0.2 | ≤ 966 (MPa) |
| TeileRm | ≤ 119 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 414 |
ASTM A841/A841M Grade G Class 9 Material Thermal Properties
The thermal performance parameters of the ASTM A841/A841M Grade G Class 9 steel are as follows:
| Temperature (°C) | 34 | 868 | 394 |
| Modulus of elasticity (GPa) | - | 794 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 343 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 113 |
| Poisson’s coefficient, ν | - | - | 231 |
ASTM A841/A841M Grade G Class 9 Material Machining Technology
ASTM A841/A841M Grade G Class 9 steel is a high-strength, low-alloy steel used extensively in the aerospace and marine industries. The alloy has been designed to be machinable, making it an ideal choice for a variety of parts and components. ASTM A841/A841M Grade G Class 9 steel can be machined with a variety of tools and techniques.