JIS G3445 STKM14A is a Japanese Industrial Standard for carbon steel tubes used for mechanical and general engineering purposes. This grade is known for its excellent mechanical properties and is widely used in various industries. Below is a detailed overview of its chemical composition, mechanical properties, heat treatment conditions, available size range, low-temperature impact test, primary applications, and related supply cases from TJC Steel Group.

Chemical Composition:

The chemical composition of STKM14A is strictly controlled to ensure the desired mechanical properties and weldability. The typical chemical composition is as follows:

· Carbon (C): 0.15% max

· Silicon (Si): 0.15% - 0.35%

· Manganese (Mn): 0.30% - 0.90%

· 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 STKM14A are characterized by its high strength and good ductility. The typical mechanical properties are as follows:

· Tensile Strength: 400 - 510 MPa

· Yield Strength: 245 MPa min

· Elongation: 25% min

· Hardness: 179 HB max

Heat Treatment Conditions:

STKM14A tubes are generally supplied in the normalized or as-rolled condition. Normalizing improves the mechanical properties and ensures uniformity in the material's structure.

Available Size Range:

TJC Steel Group offers STKM14A tubes in a wide range of sizes to meet various application requirements. The typical size range is as follows:

· Outer Diameter: 6.0 mm - 219.1 mm

· Wall Thickness: 0.5 mm - 10.0 mm

· Length: Random length, fixed length, or as required by the customer

Low-Temperature Impact Test:

STKM14A tubes are suitable for use in low-temperature environments. They undergo a low-temperature impact test to ensure their toughness and impact resistance at sub-zero temperatures.

Primary Applications:

Due to its excellent mechanical properties and weldability, STKM14A is widely used in the following applications:

· Automotive parts

· Mechanical structures

· General engineering components

· Hydraulic and pneumatic cylinder tubes

· Precision machinery parts

TJC Steel Group Supply Cases:

TJC Steel Group has extensive experience in supplying high-quality STKM14A carbon steel tubes to various industries. One notable supply case involves the supply of STKM14A tubes for the construction of hydraulic systems in heavy machinery. The tubes supplied by TJC met the strict requirements for tensile strength and elongation, ensuring the reliability and durability of the machinery.

Another successful case was the supply of STKM14A tubes for automotive exhaust systems. The tubes supplied by TJC exhibited excellent resistance to corrosion and high-temperature conditions, contributing to the longevity and performance of the vehicles.

In conclusion, JIS G3445 STKM14A carbon steel tubes are a versatile and reliable material choice for a wide range of applications. TJC Steel Group's commitment to quality and customer satisfaction ensures that clients receive the highest quality products tailored to their specific needs.