SAE J404 51L30 Introduce
SAE J404 51L30 steel is widely used in automotive and aviation applications due to its combination of strength, hardness and machinability. It is used in automotive components such as drive shafts, axles and engines. It is also often used in aviation components such as landing gear.
Smelting temperature:1996°C - 1866°C
Application:Chemical compositions of SAE alloy steels
SAE J404 51L30 Material Chemical Composition
The chemical composition of the SAE J404 51L30 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) | - | 0.0300 |
| Nickel (Ni) | - | 0.2500 |
| Molybdenum (Mo) | - | 0.0600 |
| Manganese (Mn) | 0.7000 | 0.9000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | 0.8000 | 1.1000 |
| Carbon (C) | 0.2800 | 0.3300 |
SAE J404 51L30 Material Mechanical Properties
SAE J404 51L30 steel also has excellent corrosion resistance. It is a low-alloy steel, so it has limited corrosion resistance compared to stainless steels. However, the addition of vanadium to the steel increases its corrosion resistance. This makes it an ideal choice for applications where corrosion resistance is an important factor, such as exposed elements or those in contact with sea water and other corrosive liquids.
The mechanical properties of the SAE J404 51L30 steel are as follows:
| YieldRp0.2 | ≤ 332 (MPa) |
| TeileRm | ≤ 445 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 41% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 223 |
SAE J404 51L30 Material Thermal Properties
The thermal performance parameters of the SAE J404 51L30 steel are as follows:
| Temperature (°C) | 23 | 447 | 236 |
| Modulus of elasticity (GPa) | - | 296 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 414 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.44 | - | - |
| Deity (kg/dm³) | - | - | 241 |
| Poisson’s coefficient, ν | - | - | 422 |
SAE J404 51L30 Material Machining Technology
By taking the right steps when machining SAE J404 51L30 steel, machinists can ensure successful results with minimal tool wear and downtime. The key considerations for safe and efficient machining of SAE J404 51L30 steel include selecting the correct tooling and cutting parameters, using adequate lubricants and coolants, and employing simple techniques to minimize tool wear. With these tips in mind, machinists can look forward to achieving consistent, high-quality results when machining SAE J404 51L30 steel.