The JIS G3445 STKM12C carbon steel tubes are a part of the Japanese Industrial Standards (JIS) for steel pipes. These tubes are widely recognized for their excellent mechanical properties and are commonly used in various industries. This article provides a detailed overview of the chemical composition, mechanical properties, heat treatment conditions, available size range, low-temperature impact testing, primary applications, and supply cases from TJC Steel Group.

Chemical Composition:

The chemical composition of JIS G3445 STKM12C carbon steel tubes is strictly controlled to ensure the desired mechanical properties and performance characteristics. The typical chemical composition includes:

· Carbon (C): 0.15% max

· Silicon (Si): 0.35% max

· Manganese (Mn): 0.60% max

· 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 STKM12C steel tubes are as follows:

· Tensile Strength: 370-520 MPa

· Yield Strength: 235 MPa min

· Elongation: 25% min

· Hardness: 170 HB max

Heat Treatment Conditions:

The STKM12C tubes are generally supplied in the normalized or as-rolled condition. Normalizing improves the mechanical properties of the steel by refining the grain size and ensuring uniformity throughout the material.

Available Size Range:

TJC Steel Group offers JIS G3445 STKM12C carbon steel tubes in a wide range of sizes to meet various application requirements. The typical size range includes:

· Outer Diameter: 6.0 mm to 219.1 mm

· Wall Thickness: 0.5 mm to 10.0 mm

· Length: Up to 12 meters (varies based on OD and WT)

Low-Temperature Impact Test:

STKM12C tubes are suitable for use in low-temperature applications. They undergo a low-temperature impact test to ensure their toughness and impact resistance at sub-zero temperatures.

Primary Applications:

The versatility of JIS G3445 STKM12C carbon steel tubes makes them suitable for a wide range of applications, including:

· Automotive parts

· Mechanical equipment

· General engineering purposes

· Hydraulic and pneumatic systems

· Structural applications

TJC Steel Group Supply Cases:

TJC Steel Group has extensive experience in supplying high-quality JIS G3445 STKM12C carbon steel tubes to various industries. One notable supply case involved the delivery of STKM12C tubes for use in the construction of a bridge. The tubes were selected for their excellent mechanical properties and ability to withstand harsh environmental conditions. Another case saw TJC providing these tubes for a hydraulic system in a heavy machinery manufacturing plant, where their strength and durability were crucial.

In conclusion, JIS G3445 STKM12C carbon steel tubes are a reliable choice for applications requiring high strength, durability, and resistance to low temperatures. TJC Steel Group's expertise and commitment to quality make them a trusted supplier of these tubes to industries worldwide.