SAE J404 46L15 Introduce
SAE J404 (Steel, Carbon and High-Strength, Low Alloy – Chemical Composition Limits) is a standard created by the Society of Automotive Engineers (SAE) that outlines the limits for chemical composition of carbon and alloy steel. This standard is used as a reference for specifying automotive steel grades that are produced for various applications, especially for use in parts like engine blocks and crankshafts.
Smelting temperature:1354°C - 1653°C
Application:Chemical compositions of SAE alloy steels
SAE J404 46L15 Material Mechanical Properties
The alloying elements present in SAE J404 46L15 steel endow it with a range of mechanical properties. It is a relatively low-carbon steel, meaning that it is fairly soft and ductile and can be easily machined and welded. This makes it a popular choice for a wide range of applications. The steel has an ultimate tensile strength of around 400 MPa, a yield strength of 250 MPa, and an elongation of 16-22%.
The mechanical properties of the SAE J404 46L15 steel are as follows:
| YieldRp0.2 | ≤ 128 (MPa) |
| TeileRm | ≤ 383 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 44% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 122 |
SAE J404 46L15 Material Thermal Properties
The thermal performance parameters of the SAE J404 46L15 steel are as follows:
| Temperature (°C) | 14 | 662 | 521 |
| Modulus of elasticity (GPa) | - | 852 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 34.3 | 21.2 |
| Specific thermal capacity (J/kg·°C) | - | 341 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 132 |
| Poisson’s coefficient, ν | - | - | 144 |
SAE J404 46L15 Material Machining Technology
SAE J404 46L15 steel is a medium carbon steel that contains up to 0.55% carbon, 0.30% manganese and 0.80% silicon. It is known for its high hardenability, being able to attain very high Rockwell hardness ratings of up to 62 HRC – making it a particularly hard and difficult material to machine. Furthermore, although SAE J404 46L15 steel is a hard material, it is also a highly ductile one with excellent formability. As a result, it is a popular choice of material across several industries, including automotive, aerospace, and medical.