ASTM A1008/A1008M HSLAS Grade 340 Class 2 Introduce
The ASTM A1008/A1008M HSLAS Grade 340 Class 2 is a low-carbon steel that is used for cold-forming operations. It is manufactured in a variety of forms, including coil, sheet, strip, plate and tube. Although this steel is low-carbon, it is composed of various alloying elements, such as manganese, sulfur and phosphorus, to improve its mechanical and physical properties. The ASTM A1008/A1008M HSLAS Grade 340 Class 2 is considered a versatile material due to its ability to be formed into structural and commercial shapes.
Smelting temperature:1158°C - 1287°C
Application:Standard Specification for Steel Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability
ASTM A1008/A1008M HSLAS Grade 340 Class 2 Material Mechanical Properties
The chemical composition of ASTM A1008/A1008M HSLAS Grade 340 Class 2 steel helps determine its mechanical properties, including hardness, tensile strength, yield strength, elongation, and ductility. Each of these properties is affected by the chemical makeup of the steel. For instance, higher amounts of carbon increase strength and hardness, while higher amounts of phosphorus and sulfur can reduce ductility. Furthermore, the presence of manganese increases strength, while the presence of silicon increases hardness.
The mechanical properties of the ASTM A1008/A1008M HSLAS Grade 340 Class 2 steel are as follows:
| YieldRp0.2 | ≤ 551 (MPa) |
| TeileRm | ≤ 761 (MPa) |
| ImpactKV/Ku | 43(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 433 |
ASTM A1008/A1008M HSLAS Grade 340 Class 2 Material Thermal Properties
The thermal performance parameters of the ASTM A1008/A1008M HSLAS Grade 340 Class 2 steel are as follows:
| Temperature (°C) | 42 | 185 | 468 |
| Modulus of elasticity (GPa) | - | 555 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 22 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 312 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 143 |
| Poisson’s coefficient, ν | - | - | 121 |
ASTM A1008/A1008M HSLAS Grade 340 Class 2 Material Machining Technology
ASTM A1008/A1008M HSLAS Grade 340 Class 2 steel is a low-carbon steel that is commonly used in commercial and industrial construction applications. It is especially beneficial for components that require strength, as well as formability and machinability. In addition to its physical characteristics, ASTM A1008/A1008M HSLAS Grade 340 Class 2 steel also has a variety of thermal properties that are beneficial for certain applications.