ASTM A285/A285M A285 Grade B Introduce
The ASTM A285/A285M steel standard covers steel plates for use in pressure vessels and for general applications. It specifies requirements for carbon-manganese-silicon steel plates with a thickness of 3/16'' (4.76 mm) or more and an ultimate tensile strength of 41,000 psi (285 MPa). The materials covered are available in four grades, designated A,B,C, and D.
Smelting temperature:1771°C - 1729°C
Application:Low and medium tensile strength carbon steel sheets for pressure vessels
ASTM A285/A285M A285 Grade B Material Chemical Composition
The chemical composition of the ASTM A285/A285M A285 Grade B steel are as follows:
| Element | Min | Max |
|---|---|---|
| Copper (Cu) | 0.2000 | 0.3500 |
| PhOsphorus (P) | - | 0.0350 |
| Sulfur (S) | - | 0.0350 |
| Manganese (Mn) | - | 0.9000 |
| Carbon (C) | - | 0.2200 |
ASTM A285/A285M A285 Grade B Material Mechanical Properties
The mechanical properties of ASTM A285/A285M A285 Grade B steel are mainly related to its strength, ductility, and hardness. The yield strength of this type of steel is around 55 ksi, while the ultimate tensile strength is around 85 ksi. The yield strength is the amount of load needed to cause plastic deformation of the material, while the ultimate tensile strength is the amount of load needed to cause rupture or breakage. The material typically has elongation of around 25-30%, with an excellent weldability. The material also has a relatively high Charpy V-notch (CVN) impact toughness of 30-50 ft-lbs at room temperature.
The mechanical properties of the ASTM A285/A285M A285 Grade B steel are as follows:
| YieldRp0.2 | ≤ 655 (MPa) |
| TeileRm | ≤ 659 (MPa) |
| ImpactKV/Ku | 21(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 141 |
ASTM A285/A285M A285 Grade B Material Thermal Properties
The thermal performance parameters of the ASTM A285/A285M A285 Grade B steel are as follows:
| Temperature (°C) | 22 | 174 | 328 |
| Modulus of elasticity (GPa) | - | 256 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 432 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 213 |
| Poisson’s coefficient, ν | - | - | 114 |
ASTM A285/A285M A285 Grade B Material Machining Technology
ASTM A285/A285M A285 Grade B steel is a low-to-medium strength steel that is widely used in manufacturing processes. It must be treated with heat treatment in order to provide better strength and stability, and the machinability of this material depends on its heat treatment. When machining ASTM A285/A285M A285 Grade B steel it is important to understand the proper heat treatment, choose the right tools and coolant, and operate at the correct speed, in order to ensure efficient and accurate machining.