ASTM A514/A514M A514 Grade K Introduce
ASTM A514/A514M A514 Grade K is commonly used in structures where high strength and low weight is critical. Examples include bridge construction, pressure vessels, mining and construction machinery, and oil and gas industries. It can also be used in other areas where increased strength and good fatigue resistance are required.
Smelting temperature:1217°C - 1511°C
Application:High yield strength alloy steel plate for tempering and quenching for welding
ASTM A514/A514M A514 Grade K Material Mechanical Properties
ASTM A514/A514M A514 Grade K steel is a high-strength, low-alloy structural steel used for structural applications requiring improved strength and higher levels of strain and fatigue resistance than other grades of commercially available steel. ASTM A514/A514M A514 Grade K is an ideal choice for applications requiring a material that exhibits high strength, a good weldability, and excellent toughness.
The mechanical properties of the ASTM A514/A514M A514 Grade K steel are as follows:
| YieldRp0.2 | 528 (≥)(MPa) |
| TeileRm | 432 (≥)(MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 113 |
ASTM A514/A514M A514 Grade K Material Thermal Properties
The thermal performance parameters of the ASTM A514/A514M A514 Grade K steel are as follows:
| Temperature (°C) | 33 | 544 | 974 |
| Modulus of elasticity (GPa) | - | 892 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 12.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 241 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.43 | - | - |
| Deity (kg/dm³) | - | - | 343 |
| Poisson’s coefficient, ν | - | - | 132 |
ASTM A514/A514M A514 Grade K Material Machining Technology
The machining process of ASTM A514/A514M A514 Grade K steel requires the use of specific tools and cutting speeds. The recommended tools for machining this steel include carbide tipped tools, high-speed steel tools, and specialty tools. It is also important to use tools with sharp edges, optimal cutting angles, and rigid holders to minimize heat generated by cutting. The cutting speed for this steel should be within 60 to 90 m/min.