ASTM A1011/A1011M HSLAS Grade 340 Class 2 Introduce
ASTM A1011/A1011M is a steel standard that was developed by the American Society for Testing and Materials (ASTM) in 2003. The standard defines requirements for steels used in sheet, strip, and plate forms, along with bars and rods. It is primarily focused on hot-rolled and cold-rolled sheets, but also includes specifications for painting, zinc-coating, and annealing.
Smelting temperature:1929°C - 1598°C
Application:Standard Specification for Steel Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability
ASTM A1011/A1011M HSLAS Grade 340 Class 2 Material Mechanical Properties
ASTM A1011/A1011M HSLAS Grade 340 Class 2 is a hot rolled, affinity-annealed, low carbon steel with a substrate of 2.25-3.0 percent carbon and micro-alloying elements. The alloying elements provide a stronger and more uniform material structure and increased tensile strength. This makes it suitable for applications such as structural beams, agricultural uses, and high pressure applications like pressurized gas lines.
The mechanical properties of the ASTM A1011/A1011M HSLAS Grade 340 Class 2 steel are as follows:
| YieldRp0.2 | ≤ 157 (MPa) |
| TeileRm | ≤ 655 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 321 |
ASTM A1011/A1011M HSLAS Grade 340 Class 2 Material Thermal Properties
The thermal performance parameters of the ASTM A1011/A1011M HSLAS Grade 340 Class 2 steel are as follows:
| Temperature (°C) | 12 | 585 | 654 |
| Modulus of elasticity (GPa) | - | 298 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 421 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 123 |
| Poisson’s coefficient, ν | - | - | 423 |
ASTM A1011/A1011M HSLAS Grade 340 Class 2 Material Machining Technology
The machining of ASTM A1011/A1011M HSLAS Grade 340 Class 2 steel is a process that needs to be done with precision and care. It is important to consider the type of process, cutting tools, and speeds used to ensure a quality result. Milling, turning, drilling, and grinding are all common processes that can be used to machine ASTM A1011/A1011M HSLAS Grade 340 Class 2 steel, but each process requires different speeds, cutting tools, and lubricants. By following the guidelines outlined in this article, a reliable, quality end-product can be achieved.