ASTM A508/A508M Grade 22 Class 6 Introduce
ASTM A508/A508M Grade 22 Class 6 steel is a medium carbon, low-alloy steel. It has good weldability and machinability properties, and is frequently used in structures subject to high stresses such as bridges and buildings. Some of the other uses of ASTM A508/A508M Grade 22 Class 6 steel include applications such as pressure vessels, storage tanks, and heat exchangers.It provides them with an exceptional range of features, especially when it comes to thermal properties. Its thermal expansion and thermal diffusivity ensure that the steel is able to quickly and efficiently move the energy of heat through it.
Smelting temperature:1711°C - 1322°C
Application:Carbon steel and alloy steel forgings for quenching and tempering vacuum treatment of pressure vessels
ASTM A508/A508M Grade 22 Class 6 Material Chemical Composition
The chemical composition of the ASTM A508/A508M Grade 22 Class 6 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | 0.1100 | 0.1500 |
| Manganese (Mn) | 0.3000 | 0.6000 |
| PhOsphorus (P) | - | 0.0150 |
| Sulfur (S) | - | 0.0150 |
| Silicon (Si) | - | 0.3500 |
| Nickel (Ni) | - | 0.2500 |
| Chromium (Cr) | 2.0000 | 2.5000 |
| Molybdenum (Mo) | 0.9000 | 1.1000 |
| Copper (Cu) | - | 0.2500 |
| Vanadium (V) | - | 0.0200 |
| (Cb) | - | 0.0100 |
| Titanium (Ti) | - | 0.0150 |
| Calcium (Ca) | - | 0.0150 |
| Boron (B) | - | 0.0030 |
| Aluminum (Al) | - | 0.0250 |
ASTM A508/A508M Grade 22 Class 6 Material Mechanical Properties
The mechanical properties of the ASTM A508/A508M Grade 22 Class 6 steel are as follows:
| YieldRp0.2 | ≤ 742 (MPa) |
| TeileRm | ≤ 758 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 12% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 412 |
ASTM A508/A508M Grade 22 Class 6 Material Thermal Properties
The thermal performance parameters of the ASTM A508/A508M Grade 22 Class 6 steel are as follows:
| Temperature (°C) | 34 | 462 | 211 |
| Modulus of elasticity (GPa) | - | 358 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 12.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 421 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 344 |
| Poisson’s coefficient, ν | - | - | 311 |