The JIS G3445 STKM12B carbon steel tubes are seamless steel tubes designed for mechanical and general engineering purposes. These tubes are manufactured to meet the Japanese Industrial Standards (JIS) and are widely recognized for their excellent mechanical properties and reliability in various applications.

Chemical Composition:

The chemical composition of STKM12B carbon steel tubes is strictly controlled to ensure the desired mechanical properties and weldability. 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 STKM12B tubes are characterized by their strength and durability. The minimum tensile strength is 370 MPa, with a minimum yield strength of 245 MPa. The elongation should be at least 25% over a gauge length of 5.65√S0 (where S0 is the original cross-sectional area).

Heat Treatment Conditions:

STKM12B tubes are typically supplied in the normalized condition, which provides a uniform microstructure and good mechanical properties. However, they can also be supplied in other heat treatment conditions such as annealed or quenched and tempered, depending on the specific requirements of the application.

Production Size Range:

TJC Steel Group offers STKM12B carbon steel tubes in a wide range of sizes to meet various engineering needs. The tubes can be produced with an outer diameter ranging from 6.0 mm to 219.1 mm and a wall thickness from 0.5 mm to 10 mm.

Low-Temperature Impact Test:

STKM12B tubes are suitable for use in low-temperature environments, as they can withstand impact testing at -10°C. This ensures that the tubes maintain their integrity and performance in cold conditions.

Main Applications:

Due to their excellent mechanical properties and versatility, STKM12B carbon steel tubes are widely used in several industries, including:

· Automotive industry for structural parts

· Machinery manufacturing for hydraulic and pneumatic cylinders

· General engineering applications requiring robust and reliable tubing

TJC Steel Group Supply Cases:

TJC Steel Group has a proven track record of supplying high-quality STKM12B carbon steel tubes to various industries. One notable supply case involved the delivery of precision tubes for the construction of a new generation of high-speed trains. The tubes were used in the manufacture of critical components, where their strength and reliability were crucial for the safety and performance of the trains.

Another case saw TJC supplying STKM12B tubes for the construction of a large-scale hydraulic system in a heavy machinery manufacturing plant. The tubes' ability to withstand high pressures and resist fatigue made them the ideal choice for this application.

In conclusion, JIS G3445 STKM12B carbon steel tubes are a versatile and reliable product, well-suited for a wide range of applications. TJC Steel Group's commitment to quality and customer satisfaction ensures that these tubes meet the highest industry standards, making them a preferred choice for engineers and manufacturers worldwide.