ASTM A841/A841M A841 Grade B Class 2 Introduce
The ASTM A841/A841M steel standard is an important specification that provides material specifications for the production of structural steel plates and shapes. The specification outlines stringent requirements for the material in terms of chemical composition, mechanical properties, testing and verification. These requirements ensure that the material meets the needs of the end-user and ensures a consistent quality of material. As such, the ASTM A841/A841M steel standard is a valuable tool in the engineering and construction of structures where superior strength and reliability are a must.
Smelting temperature:1136°C - 1751°C
Application:Steel plate processed by temperature mechanical control process for pressure vessels
ASTM A841/A841M A841 Grade B Class 2 Material Chemical Composition
The chemical composition of the ASTM A841/A841M A841 Grade B Class 2 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Copper (Cu) | - | 0.3500 |
| Titanium (Ti) | 0.0060 | 0.0200 |
| Aluminum (Al) | - | 0.0200 |
| Niobium (Nb) | - | 0.0300 |
| Vanadium (V) | - | 0.0600 |
| Molybdenum (Mo) | - | 0.3000 |
| Nickel (Ni) | - | 0.6000 |
| Chromium (Cr) | - | 0.2500 |
| PhOsphorus (P) | - | 0.0300 |
| Sulfur (S) | - | 0.0250 |
| Manganese (Mn) | 1.0000 | 1.6000 |
| Silicon (Si) | 0.1500 | 0.5000 |
| Carbon (C) | - | 0.1500 |
| Manganese (Mn) | 0.7000 | 1.3500 |
| (CEV) | - | 0.4500 |
| Aluminum (Al) | 0.0200 | - |
ASTM A841/A841M A841 Grade B Class 2 Material Mechanical Properties
Due to its chemical composition and combination of alloying elements, ASTM A841/A841M A841 Grade B Class 2 steel has excellent weldability properties. This steel is typically welded with a shielding-gas process, in which an inert gas is used to cover the molten area of the weld. This inert gas prevents oxidation and other forms of contamination from occurring, which could otherwise weaken the weld joint. When welding this steel, the heat input should be minimized to maintain its superior strength and ductility values.
The mechanical properties of the ASTM A841/A841M A841 Grade B Class 2 steel are as follows:
| YieldRp0.2 | ≤ 232 (MPa) |
| TeileRm | ≤ 275 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 331 |
ASTM A841/A841M A841 Grade B Class 2 Material Thermal Properties
The thermal performance parameters of the ASTM A841/A841M A841 Grade B Class 2 steel are as follows:
| Temperature (°C) | 41 | 194 | 241 |
| Modulus of elasticity (GPa) | - | 852 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 44.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 412 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 113 |
| Poisson’s coefficient, ν | - | - | 243 |
ASTM A841/A841M A841 Grade B Class 2 Material Machining Technology
Machining ASTM A841/A841M A841 Grade B Class 2 steel can be difficult due to the hardness of the material. By properly selecting the tooling, adjusting the cutting speed and feed rate, and preparing the material prior to machining, the process can be made simpler. With these tips, machining ASTM A841/A841M A841 Grade B Class 2 steel can be accomplished with accuracy, consistency, and quality.