ASTM A29/A29M Grade 51L60 Introduce
ASTM A29/A29M Grade 51L60 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:1253°C - 1197°C
Application:Hot forged and cold worked carbon steel and alloy steel rods
ASTM A29/A29M Grade 51L60 Material Chemical Composition
The chemical composition of the ASTM A29/A29M Grade 51L60 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) | - | 0.2500 |
| Molybdenum (Mo) | - | 0.0600 |
| Manganese (Mn) | 0.7500 | 1.0000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | 0.7000 | 0.9000 |
| Carbon (C) | 0.5600 | 0.6400 |
ASTM A29/A29M Grade 51L60 Material Mechanical Properties
Heat treatment is an important step that determines the mechanical properties of ASTM A29/A29M Grade 51L60 steel. Heat treatment involves heating the steel to a specific temperature and then rapidly cooling it, usually with air or oil. The temperature and rate of cooling must be closely monitored and controlled to ensure the desired mechanical properties are obtained. For example, if the steel is cooled too quickly, it will be brittle and prone to cracking or breaking. On the other hand, if it is cooled too slowly, the steel will be weak and easily deformed.
The mechanical properties of the ASTM A29/A29M Grade 51L60 steel are as follows:
| YieldRp0.2 | ≤ 695 (MPa) |
| TeileRm | ≤ 561 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 42% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 111 |
ASTM A29/A29M Grade 51L60 Material Thermal Properties
The thermal performance parameters of the ASTM A29/A29M Grade 51L60 steel are as follows:
| Temperature (°C) | 31 | 367 | 625 |
| Modulus of elasticity (GPa) | - | 823 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 432 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 213 |
| Poisson’s coefficient, ν | - | - | 222 |
ASTM A29/A29M Grade 51L60 Material Machining Technology
ASTM A29/A29M Grade 51L60 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 51L60 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 51L60 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.