ASTM A576 Grade 11L40 Introduce
ASTM A576 Grade 11L40 is a special-graded steel with a unique chemical composition and a wide range of mechanical properties. The steel is manufactured by a modified version of the open-hearth process, making it ideal for a wide range of engineering and construction applications. ASTM A576 Grade 11L40 is a low-alloy steel and is primarily used in pipe and structural applications requiring high strength and lower temperatures. The steel has a relatively low-carbon content, making it a versatile and cost-effective option.
Smelting temperature:1723°C - 1868°C
Application:Super hot rolled carbon steel rod
ASTM A576 Grade 11L40 Material Mechanical Properties
The mechanical properties of the ASTM A576 Grade 11L40 steel are as follows:
| YieldRp0.2 | ≤ 236 (MPa) |
| TeileRm | ≤ 173 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 422 |
ASTM A576 Grade 11L40 Material Thermal Properties
The thermal performance parameters of the ASTM A576 Grade 11L40 steel are as follows:
| Temperature (°C) | 41 | 193 | 888 |
| Modulus of elasticity (GPa) | - | 535 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 223 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 221 |
| Poisson’s coefficient, ν | - | - | 434 |
ASTM A576 Grade 11L40 Material Machining Technology
When machining ASTM A576 Grade 11L40 steel, it is important to select suitable cutting tools. High-speed steel (HSS) is the most common choice for this application, as it can offer the best performance and offers good heat resistance. Cobalt-based cutting tools can be effective in some cases, but are usually more expensive. It is also important to keep in mind that high cutting speeds should be avoided when using HSS cutting tools.