JIS G3445 STKM12C Introduce
JIS G3445 STKM12C can be used in a variety of applications that require a strong and reliable steel. Some of the most common applications are in construction, automotive, vehicle components, pipes and tubes. The steel is particularly suited to these types of applications because of its strength and flexibility.JIS G3445 STKM12C grade steel is an excellent choice for any application where strength, durability and corrosion resistance are important. It is also an excellent choice for applications that require a steel that is both strong and flexible.
Smelting temperature:1757°C - 1653°C
Application:Carbon steel pipe for mechanical structure
JIS G3445 STKM12C Material Chemical Composition
The chemical composition of the JIS G3445 STKM12C steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | - | 0.6000 |
| Carbon (C) | - | 0.2000 |
JIS G3445 STKM12C Material Mechanical Properties
JIS G3445 is a Japanese Industrial Standard (JIS) for carbon steel pipes used in mechanical and automotive engineering applications. The mechanical properties of JIS G3445 STKM12C steel are essential to its performance, strength, and durability. This article provides an in-depth overview of the mechanical properties of this material, including its yield strength, tensile strength, and elongation.
The mechanical properties of the JIS G3445 STKM12C steel are as follows:
| YieldRp0.2 | ≤ 246 (MPa) |
| TeileRm | ≤ 294 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
JIS G3445 STKM12C Material Thermal Properties
The thermal performance parameters of the JIS G3445 STKM12C steel are as follows:
| Temperature (°C) | 11 | 124 | 293 |
| Modulus of elasticity (GPa) | - | 645 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 41 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 131 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.23 | - | - |
| Deity (kg/dm³) | - | - | 434 |
| Poisson’s coefficient, ν | - | - | 322 |
JIS G3445 STKM12C Material Machining Technology
A number of different machining operations can be employed when machining JIS G3445 STKM12C steel. These operations include turning, facing, drilling, reaming, and tapping. The workpiece must be securely held in the machine table before machining begins. When drilling and tapping, it is important to use the correct drill points, as incorrect drill points may cause the taps to bind or break. Additionally, when drilling deep holes, the use of a coolant is recommended as it will prevent the tool from overheating and ensure optimal performance.