ASTM A1008/A1008M HSLAS Grade 70 Class 2 Introduce
ASTM A1008/A1008M HSLAS Grade 70 Class 2 is a specification for cold-rolled, carbon steel used for structural, general engineering, and automotive applications. It is notable for its high strength-to-weight ratio and resistance to fatigue. It is available in commercial, drawing, and annealed grades in thicknesses from 0.4 mm to 4.75 mm. ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel can be cold-rolled and hot-rolled, although the latter is less common.
Smelting temperature:1193°C - 1697°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 70 Class 2 Material Chemical Composition
The chemical composition of the ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | 0.0050 | - |
| Titanium (Ti) | 0.0050 | - |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Nickel (Ni) | - | 0.2000 |
| Niobium (Nb) | 0.0050 | - |
| Molybdenum (Mo) | - | 0.1600 |
| Manganese (Mn) | - | 1.6500 |
| Copper (Cu) | - | 0.2000 |
| Chromium (Cr) | - | 0.1500 |
| Carbon (C) | - | 0.1500 |
ASTM A1008/A1008M HSLAS Grade 70 Class 2 Material Mechanical Properties
ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel is a low carbon steel with excellent mechanical properties that has been widely used in a variety of industries in the recent past. Its mechanical properties are largely determined by its chemical composition, such as its carbon and manganese levels, and can be influenced by external factors such as temperature, strain rate, and alloying elements. These factors have an effect on its tensile strength, yield strength, elongation, and hardness. All of these properties must be considered when selecting ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel for an application.
The mechanical properties of the ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel are as follows:
| YieldRp0.2 | ≤ 895 (MPa) |
| TeileRm | ≤ 591 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 34% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 134 |
ASTM A1008/A1008M HSLAS Grade 70 Class 2 Material Thermal Properties
The thermal performance parameters of the ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel are as follows:
| Temperature (°C) | 24 | 856 | 836 |
| Modulus of elasticity (GPa) | - | 713 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 441 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 231 |
| Poisson’s coefficient, ν | - | - | 412 |
ASTM A1008/A1008M HSLAS Grade 70 Class 2 Material Machining Technology
ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel is a popular material that is often used in sheet metal fabrication. It is a low-carbon steel that is known for its hardness and strength. Machining this material can be a challenge due to its high hardness, but several methods can be used to successfully machine it. Diamond grinding, EDM, milling, and turning are all effective methods of machining ASTM A1008/A1008M HSLAS Grade 70 Class 2 steel. It is important to keep several factors in mind when machining this material, such as the use of sharp tools and a slower speed and feed rate. With the correct tools and techniques, it is possible to achieve successful results when machining this material.