JIS G3445 STKM13B Introduce
The introduction of the JIS G3445 steel standard has revolutionized the steel engineering industry by providing a unified set of standards for the manufacturing and processing of cold rolled steel tubes. It provides guidance and specifications for different materials and operations, as well as testing and inspection requirements, which helps to ensure that the produced steel tubes are of a high quality and meet the required safety and performance standards. Overall, the JIS G3445 steel standard has been of tremendous benefit to the steel engineering industry and has improved the quality of steel tubes produced.
Smelting temperature:1485°C - 1199°C
Application:Carbon steel pipe for mechanical structure
JIS G3445 STKM13B Material Chemical Composition
The chemical composition of the JIS G3445 STKM13B steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | 0.3000 | 0.9000 |
| Carbon (C) | - | 0.2500 |
JIS G3445 STKM13B Material Mechanical Properties
JIS G3445 STKM13B steel is a popular choice for many industrial applications due to its excellent performance characteristics. It has a carbon content of 0.6 - 0.9%, which makes it a medium carbon steel, and it exhibits well-balanced strength, ductility, weldability, fatigue resistance, and corrosion resistance. The alloy is also relatively easy to heat-treat, making it suitable for many types of applications. It is also known to have cost-effectiveness, making it a cost-efficient choice for many applications.
The mechanical properties of the JIS G3445 STKM13B steel are as follows:
| YieldRp0.2 | ≤ 838 (MPa) |
| TeileRm | ≤ 718 (MPa) |
| ImpactKV/Ku | 44(J) |
| ElongationA | 14% |
| Reduction in cross section on fractureZ | 44% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 421 |
JIS G3445 STKM13B Material Thermal Properties
The thermal performance parameters of the JIS G3445 STKM13B steel are as follows:
| Temperature (°C) | 21 | 354 | 987 |
| Modulus of elasticity (GPa) | - | 111 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 331 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 143 |
| Poisson’s coefficient, ν | - | - | 144 |
JIS G3445 STKM13B Material Machining Technology
JIS G3445 is a standard of Japanese Industrial Standard that governs the mechanical properties and manufacturing processes of steel tubing. It is a commonly used specification for various applications as it has good strength and ductility. The steel is machined in a number of different operations depending on the end use.