JIS G3127 SL3N440 Introduce
The steels within the JIS G3127 standard resemble the Japanese Industrial Standards Nr15 and Nr17, as well as other JIS steel grades, but exhibit higher mechanical properties due to their alloyed composition. As a low alloyed steel, the steel composition of JIS G3127 SL3N440 is characterized by its reactivity and machinability. The steel strength is also suitable for many applications that require high strength such as truck frames and bridge construction.
Smelting temperature:1458°C - 1569°C
Application:Nickel steel plate for low temperature pressure vessel
JIS G3127 SL3N440 Material Mechanical Properties
Elongation is the distance a material can be stretched before it breaks under tension. JIS G3127 SL3N440 steel usually has an elongation of around 25%. This is lower than the elongation of mild steel, which is typically around 20%. This lower elongation capacity makes the material less suitable for applications that require high levels of flexibility and stretchability.
The mechanical properties of the JIS G3127 SL3N440 steel are as follows:
| YieldRp0.2 | ≤ 827 (MPa) |
| TeileRm | ≤ 422 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 422 |
JIS G3127 SL3N440 Material Thermal Properties
The thermal performance parameters of the JIS G3127 SL3N440 steel are as follows:
| Temperature (°C) | 43 | 635 | 744 |
| Modulus of elasticity (GPa) | - | 447 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 32.3 | 31.2 |
| Specific thermal capacity (J/kg·°C) | - | 211 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 242 |
| Poisson’s coefficient, ν | - | - | 321 |
JIS G3127 SL3N440 Material Machining Technology
{standards} steel is an alloy steel produced by the Japanese Industrial Standards (JIS) group. It is one of their most widely used grade of steel and its use has been increasing in recent years. This alloy steel is composed of chromium, tungsten, cobalt, and molybdenum as its primary alloying elements, with additions of vanadium, silicon, and nickel as well. The steel has a good combination of strength and toughness and is most often used to make automotive components, piping and storage vessels, military equipment, and general machining applications.