We provide highly safe and durable carbon steel tubes for machine structures.

Sales Points

Demand for carbon steel tubes for machine structures is increasing recently. As examples, there may be mentioned hollowing out materials due to increasing needs of weight reduction and replacement for pressing sheets for reducing the number of parts.

Wide choice of materials besides JIS G 3445(carbon steel tubes for machine structures) are available depending on environment of usage and required performance

Materials available include:

• High-tensile steel
• Aluminum plated steel
• Galvanized steel
• Highly corrosion-resistant coated steel (Zn-Al-Mg-Si) SuperDyma^® developed by NIPPON STEEL CORPORATION.

Extensive range of sizes and excellent dimensional accuracy

We have tube-manufacturing equipment that can manufacturing tubes up to a maximum outer diameter of 216.3 mm as well as a variety of cold drawing equipment allowing us to provide a high level of dimensional accuracy, including for special dimensions.

Quality design depending on the intended use

We can design individual specifications that meet requirements through the use of heat treatment and finishing equipment.
We also use carbon steel tube, high-tensile steel tube, stainless steel tube, and other types of steel tube manufactured in-house to provide shaped tubes finished in a variety of shapes.

Rigorous quality control

We offer integrated quality control, from steel manufacturing through to the completed product.
We also have a full assortment of non-destructive inspection equipment for ultrasonic and eddy current testing.
Tags and/or stencils are used for identification management of all items. (Customer numbers are displayed as .)

Cooperative framework for component design

NIPPON STEEL CORPORATION Group has put in place a cooperative framework for component design and development based on its facilities including a Mechanical Tube Testing Center (evaluation and testing facility) and hydroforming machine (experiment facility).

Production Range

Production range for electric resistance welded tube (type: STKM 13)

Production range for electric resistance welded tube (type: STKM 13)

Examples of Application

Carbon steel tubes for machine structures are used in a wide variety of areas, especially components for automobiles and construction machinery.

Types	Applications
Cylinders and rods	Four-wheel vehicles: Axle tubes, tie-rods, propeller shafts, steering shafts, drive shafts, door impact beams, shock absorbers, etc. Two-wheel vehicles: Front forks, shock absorbers, etc.
Construction machinery	Frame, pillars, etc.
Machine structural components	Machine tool pillars and connecting members, precision machinery components, etc.
Other	Bicycles, furniture, etc.