ASTM A29/A29M 86L25 Introduce
ASTM A29/A29M 86L25 steel is a family of low alloy steels that are commonly used in the manufacture of mechanical components and parts. It is composed primarily of iron, with small amounts of other alloying elements such as manganese, silicon, and carbon. The low carbon content and tight control over chemical composition in ASTM A29/A29M 86L25 steel help to produce a very uniform, heat-treatable steel. The alloying elements and low carbon content also contribute to making ASTM A29/A29M 86L25 steel very ductile, strong, and resistant to wear and fatigue. ASTM A29/A29M 86L25 steel is widely used for applications that require superior mechanical properties, such as parts for machinery, automotive and aerospace applications.
Smelting temperature:1115°C - 1689°C
Application:Hot forged and cold worked carbon steel and alloy steel rods
ASTM A29/A29M 86L25 Material Chemical Composition
The chemical composition of the ASTM A29/A29M 86L25 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.1500 | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| Lead (Pb) | 0.1500 | 0.3500 |
| PhOsphorus (P) | - | 0.0350 |
| Nickel (Ni) | 0.4000 | 0.7000 |
| Molybdenum (Mo) | 0.1500 | 0.2500 |
| Manganese (Mn) | 0.7000 | 0.9000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | 0.4000 | 0.6000 |
| Carbon (C) | 0.2500 | 0.3000 |
ASTM A29/A29M 86L25 Material Mechanical Properties
ASTM A29/A29M 86L25 steel also has good corrosion resistance. This corrosion resistance is due to the alloy's chromium content, which helps to form a thin protective layer on the steel's surface. This layer helps to prevent corrosion and can increase the life of the steel.
The mechanical properties of the ASTM A29/A29M 86L25 steel are as follows:
| YieldRp0.2 | ≤ 762 (MPa) |
| TeileRm | ≤ 861 (MPa) |
| ImpactKV/Ku | 23(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 442 |
ASTM A29/A29M 86L25 Material Thermal Properties
The thermal performance parameters of the ASTM A29/A29M 86L25 steel are as follows:
| Temperature (°C) | 21 | 192 | 227 |
| Modulus of elasticity (GPa) | - | 297 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 12.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 124 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 443 |
| Poisson’s coefficient, ν | - | - | 312 |
ASTM A29/A29M 86L25 Material Machining Technology
ASTM A29/A29M 86L25 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 86L25 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 86L25 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.