JIS G3445 STKM18A Introduce
JIS G3445 STKM18A 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 STKM18A 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:1282°C - 1372°C
Application:Carbon steel pipe for mechanical structure
JIS G3445 STKM18A Material Mechanical Properties
The JIS G3445 STKM18A alloy also has outstanding fatigue resistance and excellent corrosion resistance, especially when exposed to salt water or other forms of corrosive vapors. It is known to resist a wide range of chemicals, including various alkalis and acids, making it suitable for use in chemical processing and medical equipment. Its low cost and long service life make it an ideal choice for many industries.
The mechanical properties of the JIS G3445 STKM18A steel are as follows:
| YieldRp0.2 | ≤ 919 (MPa) |
| TeileRm | ≤ 981 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 14% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 312 |
JIS G3445 STKM18A Material Thermal Properties
The thermal performance parameters of the JIS G3445 STKM18A steel are as follows:
| Temperature (°C) | 42 | 161 | 959 |
| Modulus of elasticity (GPa) | - | 181 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 32.2 |
| Specific thermal capacity (J/kg·°C) | - | 311 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 321 |
| Poisson’s coefficient, ν | - | - | 243 |
JIS G3445 STKM18A Material Machining Technology
JIS G3445 STKM18A steel is a widely used specification for tubing. It is machined through a number of different operations, with the end use determining the specific operations employed. The cutting parameters must be set correctly and the tools must be of the correct type and quality. Additionally, appropriate practices must be employed to prevent common problems such as tool wear and overheating. With the correct tools and parameters, JIS G3445 STKM18A steel can be machined successfully and with good accuracy.