JIS G3445 STKM14C is a carbon steel tube widely used in various industries for its excellent mechanical properties and chemical composition. This specification covers carbon steel tubes for machine structural purposes.

Chemical Composition:

The chemical composition of STKM14C is strictly controlled to ensure the material's quality and performance. The typical chemical composition includes:

· Carbon (C): 0.15% max

· Silicon (Si): 0.15-0.35%

· Manganese (Mn): 0.30-0.60%

· Phosphorus (P): 0.040% max

· Sulfur (S): 0.040% max

· Chromium (Cr): 0.15% max

· Nickel (Ni): 0.20% max

· Copper (Cu): 0.30% max

Mechanical Properties:

The mechanical properties of STKM14C are as follows:

· Tensile Strength: 400-510 MPa

· Yield Strength: 235 MPa min

· Elongation: 25% min

· Hardness: 179 HB max

Heat Treatment State:

STKM14C tubes are generally supplied in the normalized condition, which provides a uniform microstructure and good mechanical properties. However, they can also be supplied in other heat treatment states such as annealed or quenched and tempered, depending on the specific application requirements.

Size Range:

TJC Steel Group can produce STKM14C tubes in a wide range of sizes to meet various application needs. The typical size range includes:

· Outer Diameter: 6.0-219.1 mm

· Wall Thickness: 1.0-12.0 mm

Low-Temperature Impact Test:

STKM14C tubes are suitable for use in low-temperature environments, as they can undergo a low-temperature impact test at -10°C, ensuring their toughness and reliability in cold conditions.

Main Applications:

Due to its excellent mechanical properties and chemical composition, STKM14C is commonly used in the following applications:

· Automotive parts

· Mechanical equipment

· General machine components

· Hydraulic systems

· Pneumatic systems

TJC Steel Group Supply Cases:

TJC Steel Group has extensive experience in supplying high-quality STKM14C tubes to various industries. One notable supply case involved the production of STKM14C tubes for a major automotive manufacturer, where the tubes were used in the construction of vehicle chassis components. The tubes supplied by TJC met the stringent quality standards required by the customer, ensuring the safety and performance of the vehicles.

In conclusion, JIS G3445 STKM14C carbon steel tubes are a reliable choice for applications requiring high strength, good toughness, and excellent machinability. TJC Steel Group is a trusted supplier of these tubes, providing quality products and services to meet the needs of diverse industries.