ASTM A285/A285M A285 Grade A Introduce
ASTM A285/A285M is a standard for heat-resistant steel plates and plates used for pressure vessels. It is widely used in the engineering and construction industries, and is an important reference for engineers and personnel involved in the design, construction and maintenance of pressure vessels and other equipment.
Smelting temperature:1259°C - 1642°C
Application:Low and medium tensile strength carbon steel sheets for pressure vessels
ASTM A285/A285M A285 Grade A Material Chemical Composition
The chemical composition of the ASTM A285/A285M A285 Grade A 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) | - | 0.1700 |
ASTM A285/A285M A285 Grade A Material Mechanical Properties
The main physical properties of ASTM A285/A285M A285 Grade A steel are its hardness, ductility, and strength. The strength of this steel depends on the composition, which typically includes carbon, manganese, phosphorus, sulfur, silicon, and copper content. The primary alloy elements are typically molybdenum or chromium. The hardness of ASTM A285/A285M A285 Grade A steel is relatively low, typically in the range of 95-105 Rockwell B hardness. The material also typically has a reasonable ductility that ranges from 24-50%. The typically strength of the material falls in the range of ksi (1 ksi = 1000 lb/in2).
The mechanical properties of the ASTM A285/A285M A285 Grade A steel are as follows:
| YieldRp0.2 | ≤ 178 (MPa) |
| TeileRm | ≤ 916 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 224 |
ASTM A285/A285M A285 Grade A Material Thermal Properties
The thermal performance parameters of the ASTM A285/A285M A285 Grade A steel are as follows:
| Temperature (°C) | 23 | 155 | 391 |
| Modulus of elasticity (GPa) | - | 565 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 22.2 |
| Specific thermal capacity (J/kg·°C) | - | 422 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 433 |
| Poisson’s coefficient, ν | - | - | 424 |
ASTM A285/A285M A285 Grade A Material Machining Technology
Tapping is also an important process for this material. Taps with high rake and relief angles should be used in order to reduce cutting forces and minimize wear. For better wear resistance and tool life, a coolant should be used.