ASTM A387/A387M Grade 22 Class 1 Introduce
In order to meet the requirements of ASTM A387/A387M steel standard, manufacturers must adhere to certain manufacturing requirements to ensure consistency and adequate strength and quality. Manufacturers must ensure that the steel components meet the requirements of the three sections of the standard.
Smelting temperature:1892°C - 1466°C
Application:Pressure vessel plate, alloy steel, chrome molybdenum
ASTM A387/A387M Grade 22 Class 1 Material Chemical Composition
The chemical composition of the ASTM A387/A387M Grade 22 Class 1 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | 0.9000 | 1.1000 |
| Chromium (Cr) | 2.0000 | 2.5000 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | - | 0.0350 |
| Manganese (Mn) | 0.3000 | 0.6000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | 0.0500 | 0.1500 |
ASTM A387/A387M Grade 22 Class 1 Material Mechanical Properties
ASTM A387/A387M Grade 22 Class 1 steel is an important alloy steel class that has excellent mechanical properties. These properties include high temperature strength, high strength, high ductility, good fatigue strength, and good corrosion resistance. These all make this material suitable for a wide range of applications including automotive components, construction components, and marine applications. The overall mechanical properties of ASTM A387/A387M Grade 22 Class 1 steel make it an ideal choice of material for a variety of applications.
The mechanical properties of the ASTM A387/A387M Grade 22 Class 1 steel are as follows:
| YieldRp0.2 | ≤ 645 (MPa) |
| TeileRm | ≤ 723 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 324 |
ASTM A387/A387M Grade 22 Class 1 Material Thermal Properties
The thermal performance parameters of the ASTM A387/A387M Grade 22 Class 1 steel are as follows:
| Temperature (°C) | 13 | 849 | 863 |
| Modulus of elasticity (GPa) | - | 156 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 111 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 332 |
| Poisson’s coefficient, ν | - | - | 233 |
ASTM A387/A387M Grade 22 Class 1 Material Machining Technology
Drilling and tapping ASTM A387/A387M Grade 22 Class 1 steel requires careful consideration as this type of machining can cause a high level of surface damage. The high hardness of the steel makes it especially challenging in this respect, as it can be difficult to drill or tap without weakening or damaging the object.