ASTM A131/A131M Grade B Introduce
The American Petroleum Institute (API) created the {standatd} steel standard, also known as the Petroleum Industry Standard (PSL-3), in 2008. This standard was created to provide the industry and consumers with a sensible, consistent approach to specification and performance-based steel grades. The {stanndard} provides qualification criteria for use by automotive and other industries for the use and classification of steel plates in highly stressed components and applications. It provides a framework for the creation of a reliable, consistent product, which can be used and applied in a variety of applications that require a standard level of performance.
Smelting temperature:1338°C - 1186°C
Application:Structural steel for seagoing
ASTM A131/A131M Grade B Material Mechanical Properties
ASTM A131/A131M Grade B steel is a special type of steel used in shipbuilding and marine engineering. This type of steel has a unique set of chemical and physical properties that make it an excellent choice for these applications. Many of its characteristics also make ASTM A131/A131M Grade B steel an appealing building material for other industries as well.
The mechanical properties of the ASTM A131/A131M Grade B steel are as follows:
| YieldRp0.2 | ≤ 765 (MPa) |
| TeileRm | ≤ 334 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 143 |
ASTM A131/A131M Grade B Material Thermal Properties
The thermal performance parameters of the ASTM A131/A131M Grade B steel are as follows:
| Temperature (°C) | 13 | 225 | 547 |
| Modulus of elasticity (GPa) | - | 197 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 223 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 422 |
| Poisson’s coefficient, ν | - | - | 434 |
ASTM A131/A131M Grade B Material Machining Technology
For most metal machining operations, the most common types of tools are carbide, high-speed steel (HSS), and cobalt. Carbide and HSS tools are the most popular choice, as they tend to be strong, durable, and able to withstand high temperatures. Cobalt tools, while costlier and more difficult to maintain, are most suitable for highly abrasive materials and heavy-duty machining operations.