SAE J403 10L21 Introduce
SAE J403 is an SAE Standard for "Chemical Composition of SAE Carbon Steels." This standard specifies the chemical composition of carbon steels and includes information such as the maximum percentage of carbon, manganese, phosphorus, sulfur, silicon, chromium, nickel, molybdenum and vanadium. SAE J403 is issued by the Society of Automotive Engineers (SAE). SAE J403 10L21Carbon steel is a type of iron-carbon alloy, it contains carbon elements in different proportions and different other elements. Carbon steel is mainly used in automotive, mining and aerospace engineering. Automotive applications such as casting engine components, bodywork and frames, and aerospace applications such as aircraft frames and turbine machinery parts typically use carbon steel.
Smelting temperature:1587°C - 1575°C
Application:Chemical Compositions of SAE Carbon Steels
SAE J403 10L21 Material Mechanical Properties
SAE J403 10L21 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 10L21 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 10L21 steel are as follows:
| YieldRp0.2 | ≤ 145 (MPa) |
| TeileRm | ≤ 444 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 421 |
SAE J403 10L21 Material Thermal Properties
The thermal performance parameters of the SAE J403 10L21 steel are as follows:
| Temperature (°C) | 33 | 935 | 443 |
| Modulus of elasticity (GPa) | - | 832 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 114 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 221 |
| Poisson’s coefficient, ν | - | - | 221 |
SAE J403 10L21 Material Machining Technology
SAE J403 10L21 has good weldability compared to other steels due to its low-carbon content. It can be welded using the oxy-aceltylene process, gas metal arc welding, and resistance welding. Additionally, it can be brazed or soldered for joining different pieces of steel together.