The Stainless Steel 304 Micro Tubes are fabricated for uses where there is a requirement for accuracy in dimensions, high corrosion resistance, and good performance in miniaturized systems. The material used in SS 304 includes 18-20% chromium and 8-10.5% nickel and exhibits excellent properties such as formability, weldability, durability, and good resistance to oxidation and chemicals. Such micro tubes are manufactured with a close tolerance, thin wall and smooth internal and external finishes that are ideal for precision engineering applications. Available in seamless and welded shapes, in custom sizes and lengths, they provide a consistent quality in critical applications. USA Piping Solution is a trusted Stainless Steel 304 Micro Tubes Manufacturer and Supplier that provides precision-engineered micro tubes that meet the exact needs of customers around the world and adhere to international quality standards.
Specifications of Stainless Steel 304 Micro Tubes
| Specification Attribute | Details |
|---|---|
| Grade(s) Offered | Stainless Steel Type 304 (UNS S30400), Stainless Steel Type 304L (UNS S30403). 304L micro tube is often preferred for enhanced weldability. |
| Outer Diameter (OD) | Typically 0.008” to 0.250” (0.2 mm to 6.35 mm). Custom Micro size SS 304 tubing outside this range may be possible; please inquire. |
| Wall Thickness (WT) | Typically 0.002” to 0.040” (0.05 mm to 1.0 mm). Specialization in Thin wall SS 304 micro tube. |
| Length | Straight lengths (e.g., 1 meter, 2 meters, up to specific customer requirements) and Coils (for continuous runs, often for Stainless 304 micro capillary tubes). |
| Tolerances | Extremely tight OD, ID, and wall tolerances as per international standards or customer specifications, ensuring High-precision SS 304 micro tubing. |
| Manufacturing Process | Primarily Seamless SS 304 micro tube (achieved through precision cold drawing). Welded & Redrawn (W&R) options may be available for specific sizes/applications. |
| Surface Finish | Bright Annealed (BA) for a smooth, clean surface. Mechanical Polishing (to specific Ra values), Passivation available upon request. |
| Material Condition/Temper | Typically supplied in Annealed (soft) condition for maximum formability. Harder tempers (1/4 Hard, 1/2 Hard, Full Hard) available for increased stiffness/strength. |
| Applicable Standards | Commonly ASTM A269, ASTM A632 (for instrumentation/small diameter general service), or tailored to customer-specific requirements. |
| MTC | EN 10204 3.1 Mill Test Certificate provided with every supply, detailing compliance and traceability. |
Types of Stainless Steel 304 Micro Tubes
Coiled Pipe
Finned Tube
Puncture Tube
Applications Usage of Stainless Steel 304 Micro Tubes
- Hypodermic Needles
- Medical Catheters & Surgical Instruments
- Chromatography & Analytical Instruments
- Laboratory Instrumentation
- Pneumatic & Hydraulic Control Lines
- Food & Beverage Dispensing Equipment
- Precision Sensor & Thermocouple Protection Tubes
- Aerospace Instrumentation Tubing
Frequently Asked Questions
1. What is a stainless steel micro tube, and how is it different from standard tubing?
A stainless steel micro tube is a small-diameter precision tube with very thin walls and tight tolerances. It is designed for compact, high-precision applications where standard tubing is too large.
2. What is the difference between SS 304 and SS 316 micro tubes?
SS 316 micro tubes contain molybdenum, giving them better corrosion resistance than SS 304, especially in chloride and marine environments.
3. What is the smallest OD/wall thickness available in SS 304 micro tubing?
The smallest size varies by manufacturer, but SS 304 micro tubes can be produced with an outer diameter as small as 0.2 mm and very thin wall thicknesses for precision applications.
4. Is SS 304 micro tube seamless or welded, and does it matter for my application?
SS 304 micro tubes are available in both seamless and welded forms. Seamless tubes are preferred for high-pressure and critical applications, while welded tubes are more economical for general use.
5. Is SS 304 micro tube biocompatible and suitable for medical devices?
Yes. SS 304 micro tubes are used in many medical and laboratory devices because of their corrosion resistance, smooth surface, and ease of sterilization.
6. What is the maximum operating temperature for SS 304 micro tube?
SS 304 micro tubes are generally suitable for continuous service up to 870°C (1600°F) and intermittent service up to 925°C (1697°F) under non-corrosive conditions.