Types of Stainless Steel Tube

1 : Seamless Tube

Stainless steel tube drawn from cylindrical rod material. Excellent for producing very thick or very thin wall thicknesses that cannot be achieved by semi-seamless process.

2：Semi-seamless Tube

Stainless steel tube with annealing for stress relief drawn after welding (ERW tube) of roll formed sheet material. Less thickness variation than standard processes due to precise thickness of original sheet material.

Stainless steel tube production process

Stainless steel tube drawing process

Material Quality

Austenitic Stainless Steels

Excellent corrosion resistance due to high nickel content. Non-magnetic, but certain processes (like welding) can induce magnetism.

SUS304
The most widely used Stainless steel material with good corrosion resistance and suitability for welding.
Major chemical components: Ni(8~10.5%) and (Cr18~20%)

SUS316
Higher corrosion, acidity, and heat resistance characteristic than SUS304 due to its higher Nickel content and the addition of Molybdenum. SUS316 is excellent for use in harsh chemical and salt water environments.
Major chemical components: Ni(10~14%), Cr(16~18%) and Mo(2~3%)

SUS321
Intergranular corrosion resistance is improved over SUS304 by adding Ti. This material is suitable for high temperature environments and welding applications.
Major chemical components: Ni(9~13)% and Cr(17~19%)

SUS201
Lower cost material than SUS304. Cost reduction is achieved by using lower Ni content and substituting it with Mn and N. JIS standard specifies SUS201 as “stainless steel for springs” and an alternative to SUS301.
Major chemical components:
Ni(3.5~5.5%), Cr(16~18%), Mn(5.5~7%) and N(less than 0.25%)

SUS202
Lower cost stainless steel based on SUS302 of SUS300 series by reducing Ni. Generally used as a substitute material for applications such as cooking utensils. This material, however, is lower in corrosion resistance than SUS304.
Major chemical components:
Ni(4~6%), Cr(17~19%), Mn(7.5~10%) and N(less than 0.25%)

Ferritic and Martensitic Stainless Steel

Ferritic and Martensitic stainless steel materials possess magnetic property and are generally less expensive than Austenitic stainless steel. However, they offer a lower level of corrosion resistance.

SUS430
Basic type of Ferritic stainless steel. Corrosion resistance is inferior to SUS304 due to the lack of Ni content. SUS430 is widely used for construction materials and for home appliances due to its low cost.
Major chemical component: Cr(16~18%)

Other Materials

We also supply tubes processed from copper (OD 3mm or less), titanium (OD 8mm or less), nickel alloy (OD 20mm or less). Machining, grinding, press punching, and hardening treatment (nitriding) of various materials is available as well.

Please feel free to ask us for more information.

Small Diameter Stainless Steel Tubes

■ Field of use:	measuring machines, electronic devices, medical equipment, precision molds, etc.
■ Processing capability	< OD > 0.2mm ~ 6mm < Thickness >：0.05mm ~ 2.0mm < Tolerances >：±0.05 mm ~ 0.01mm
■ Materials	SUS304, SUS316, SUS321, SUS430, SUS201, SUS202

Precision Stainless Steel Tubes

■ Field of use:	medical equipment, electronic devices, precision machinery, office automation equipment, precision molds, hydraulic equipment
■ Processing capability	< OD > 3mm ~ 40mm < Thickness > 0.1mm ~ 2.5mm (3.5mm in case of seamless tube) < Tolerances > ±0.01mm for OD 3mm ~ 12mm,±0.1mm for OD above 12mm
■ Materials	SUS304、SUS316、SUS321、SUS430、SUS201、SUS202

Shaped Tubes

■ Field of use:	measuring machines, biochemical, electronic devices, medical equipment, industrial machinery, precision molds, etc.
■ Processing capability	< OD > 1.5mm ~ 10mm < Thickness >：0.12mm ~ 1.5mm < Tolerances >：±0.05 mm ~
■ Materials	SUS304、SUS316、SUS321、SUS430、SUS201、SUS202