ASTM A517/A517M A517 Grade A Introduce
ASTM A517/A517M A517 Grade A steel is a popular grade of construction steel used in the manufacturing of bridges, power generation equipment, cranes and more due its high strength and versatility. The chemical composition of ASTM A517/A517M A517 Grade A steel play an important role in its properties, making it essential to know what they are when deciding on its usage.
Smelting temperature:1843°C - 1258°C
Application:Tempered and quenched high-strength alloy steel sheets for pressure vessels
ASTM A517/A517M A517 Grade A Material Chemical Composition
The chemical composition of the ASTM A517/A517M A517 Grade A steel are as follows:
| Element | Min | Max |
|---|---|---|
| Boron (B) | - | 0.0025 |
| Molybdenum (Mo) | 0.1800 | 0.2800 |
| Chromium (Cr) | 0.5000 | 0.8000 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | - | 0.0350 |
| Manganese (Mn) | 0.8000 | 1.1000 |
| Silicon (Si) | 0.4000 | 0.8000 |
| Carbon (C) | 0.1500 | 0.2100 |
| Zirconium (Zr) | 0.0400 | 0.1600 |
| Silicon (Si) | 0.3400 | 0.8600 |
| Sulfur (S) | - | 0.0250 |
| PhOsphorus (P) | - | 0.0250 |
| Molybdenum (Mo) | 0.1500 | 0.3100 |
| Manganese (Mn) | 0.7400 | 1.2000 |
| Chromium (Cr) | 0.4600 | 0.8400 |
| Carbon (C) | 0.1300 | 0.2300 |
ASTM A517/A517M A517 Grade A Material Mechanical Properties
ASTM A517/A517M A517 Grade A steel has excellent mechanical properties due to its combination of specified chemical composition and processing controls used during hot-forming and cold-working. The tensile strength of the material is in the range of 115-135 ksi, and its yield strength is in the range of 75-100 ksi. The material also exhibits excellent ductility, with an elongation range of 16-25%, and a reduction of area of 45-55%.
The mechanical properties of the ASTM A517/A517M A517 Grade A steel are as follows:
| YieldRp0.2 | ≤ 165 (MPa) |
| TeileRm | ≤ 751 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 343 |
ASTM A517/A517M A517 Grade A Material Thermal Properties
The thermal performance parameters of the ASTM A517/A517M A517 Grade A steel are as follows:
| Temperature (°C) | 44 | 962 | 253 |
| Modulus of elasticity (GPa) | - | 158 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 111 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 132 |
| Poisson’s coefficient, ν | - | - | 334 |
ASTM A517/A517M A517 Grade A Material Machining Technology
When machining ASTM A517/A517M A517 Grade A steel, it is essential to use the correct cutting tools for the job. Many tools are designed specifically for the machining of this material, such as end mills and drills with carbide inserts. This will ensure that the finished part can be machined more efficiently and with more accuracy than if generic tools are used.