SAE J403 15B21 Introduce
SAE J403 15B21 steel is widely used in the automotive industry and for general purpose applications. In the automotive industry, it is typically used for structural components such as frame members and body panels. The material is also used in construction applications such as structural beams, columns, and reinforcing bars. Other common applications include appliances, agricultural equipment, machine components, and hand tools.
Smelting temperature:1829°C - 1823°C
Application:Chemical Compositions of SAE Carbon Steels
SAE J403 15B21 Material Mechanical Properties
SAE J403 15B21 steel is characterized by having good strength and hardness properties. The material has an ultimate tensile strength of 545–620 MPa, a yield strength of 340–470 MPa, and an elongation of 18–30%. The material is also relatively ductile, with a bending strength of 45–90 MPa. The mechanical properties of SAE J403 15B21 steel can be improved through heat treatment processes. Annealing can increase ductility, normalizing can improve the strength, and stress relieving can reduce the internal stresses.
The mechanical properties of the SAE J403 15B21 steel are as follows:
| YieldRp0.2 | ≤ 799 (MPa) |
| TeileRm | ≤ 277 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 233 |
SAE J403 15B21 Material Thermal Properties
The thermal performance parameters of the SAE J403 15B21 steel are as follows:
| Temperature (°C) | 44 | 133 | 678 |
| Modulus of elasticity (GPa) | - | 166 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 423 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 234 |
| Poisson’s coefficient, ν | - | - | 344 |
SAE J403 15B21 Material Machining Technology
SAE J403 15B21 steel is a versatile steel that has a wide range of uses and is highly machinable. This type of steel has excellent strength and hardness, making it ideal for a variety of applications. It is also easy to cut and shape using the right tools and machines. In order to achieve the desired results when working with this material, it is important to consider the material's properties and select an appropriate machining strategy.