ASTM A686 Type W2-9 Grade A Introduce
ASTM A686 Type W2-9 Grade A is an iron-based chemical composition alloy steel developed to meet American Society for Testing and Materials requirements. It is a versatile steel that is available in a variety of forms and steels, and is widely used in the manufacturing of a variety of products, including bridges, automobiles, piping and other industrial products. It is composed primarily of iron, with a small amount of carbon, manganese, phosphorus and sulfur. The alloying elements of this steel are chromium, molybdenum, cobalt and vanadium, resulting in a durable steel that can be heat treated for a variety of purposes.This steel has excellent resistance to corrosion and wear, making it an ideal choice for a variety of applications. It is also resistant to fatigue, making it suitable for heavy loads and high stress levels.
Smelting temperature:1395°C - 1861°C
Application:Carbon tool steel
ASTM A686 Type W2-9 Grade A Material Chemical Composition
The chemical composition of the ASTM A686 Type W2-9 Grade A steel are as follows:
| Element | Min | Max |
|---|---|---|
| Tungsten (W) | - | 0.1500 |
| Vanadium (V) | 0.1500 | 0.3500 |
| Silicon (Si) | 0.1000 | 0.4000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.2000 |
| Molybdenum (Mo) | - | 0.1500 |
| Manganese (Mn) | 0.1000 | 0.4000 |
| Copper (Cu) | - | 0.2000 |
| Chromium (Cr) | - | 0.1500 |
| Carbon (C) | 0.9000 | 1.0000 |
ASTM A686 Type W2-9 Grade A Material Mechanical Properties
The mechanical properties of the ASTM A686 Type W2-9 Grade A steel are as follows:
| YieldRp0.2 | ≤ 456 (MPa) |
| TeileRm | ≤ 429 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
ASTM A686 Type W2-9 Grade A Material Thermal Properties
The thermal performance parameters of the ASTM A686 Type W2-9 Grade A steel are as follows:
| Temperature (°C) | 33 | 224 | 376 |
| Modulus of elasticity (GPa) | - | 141 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 433 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 411 |
| Poisson’s coefficient, ν | - | - | 244 |