ASTM A29/A29M Grade 40L24 Introduce
ASTM A29/A29M Grade 40L24 steel is an alloy steel made up of iron, carbon, and other alloying elements. It has superior ductility, high tensile strength, hardness, toughness, and wear resistance. It is designed to meet a wide range of applications in the industrial, automotive, and aerospace industries.
Smelting temperature:1385°C - 1364°C
Application:Hot forged and cold worked carbon steel and alloy steel rods
ASTM A29/A29M Grade 40L24 Material Chemical Composition
The chemical composition of the ASTM A29/A29M Grade 40L24 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.3500 |
| Sulfur (S) | 0.0350 | 0.0500 |
| Lead (Pb) | 0.1500 | 0.3500 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | - | 0.2500 |
| Molybdenum (Mo) | 0.2000 | 0.3000 |
| Manganese (Mn) | 0.7000 | 0.9000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | - | 0.2000 |
| Carbon (C) | 0.2000 | 0.2500 |
ASTM A29/A29M Grade 40L24 Material Mechanical Properties
Hardness is one of the most important mechanical properties of ASTM A29/A29M Grade 40L24 steel. The hardness of this alloy can range from 40 to 60 HRC, depending on the grade of steel and the heat treatment. This hardness provides good wear resistance, making it suitable for applications that require abrasive resistance
The mechanical properties of the ASTM A29/A29M Grade 40L24 steel are as follows:
| YieldRp0.2 | ≤ 229 (MPa) |
| TeileRm | ≤ 354 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 14% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 422 |
ASTM A29/A29M Grade 40L24 Material Thermal Properties
The thermal performance parameters of the ASTM A29/A29M Grade 40L24 steel are as follows:
| Temperature (°C) | 31 | 124 | 739 |
| Modulus of elasticity (GPa) | - | 244 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 232 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 322 |
| Poisson’s coefficient, ν | - | - | 143 |
ASTM A29/A29M Grade 40L24 Material Machining Technology
ASTM A29/A29M Grade 40L24 steel is a versatile, heat-treatable alloy steel that is used in a variety of industries for many different applications. The machining of ASTM A29/A29M Grade 40L24 steel requires the use of the correct tools and cutting strategies to ensure that the part meets the customer's requirements. High speed steel and cobalt steel tools with TiAlN coating are generally the best choice for machining ASTM A29/A29M Grade 40L24 steel. The cutting parameters should be set within the recommended range to minimize wear, cutting forces, and heat generation in the cutting zone. The correct use of cutting fluid can further improve machining performance and tool life.