316L Stainless Steel Capillary Tube Ultra-Fine Precision Tubing | Minimum OD 0.5 mm
Product Overview
316L stainless steel capillary tube is a high-precision, corrosion-resistant micro tubing widely used in medical devices, instrumentation, fluid control, sensors, and laboratory equipment.
With an ultra-smooth inner bore, excellent mechanical stability, and superior corrosion resistance, 316L capillary tubes deliver outstanding performance under demanding environments such as chemicals, seawater, and high humidity.
This product supports custom sizes, including OD, ID, wall thickness, length, tolerance, and surface condition.
Key Features
-
Superior Corrosion Resistance
Excellent resistance to acids, chlorides, salts, and oxidation—ideal for harsh environments. -
Medical-Grade Cleanliness
Smooth surface finish, low impurities, suitable for high-precision fluid delivery and medical applications. -
Ultra-Fine Precision Machining
Minimum OD available: 0.3 mm
Minimum wall thickness: 0.5 mm -
Excellent Mechanical Strength
Stable performance under pressure, bending, and vibration. -
Customizable Dimensions
OD, ID, wall thickness, hardness, cutting length, and coil/spool forms can be fully customized. -
Stable Tolerances
High dimensional accuracy suitable for microfluidic systems and sensor assemblies.
Technical Specifications
| Item | Value |
|---|---|
| Material | 316L Stainless Steel |
| Outer Diameter Range | 0.3 mm – 12 mm (custom available) |
| Inner Diameter | Based on OD & wall thickness (custom available) |
| Minimum Wall Thickness | 0.5 mm |
| Length | 10 mm – 20,000 mm (cut-to-length available) |
| Form | Straight tube / Coil |
| Surface Finish | Bright annealed / Polished / Pickled |
| Manufacturing Method | Seamless / Welded |
| Hardness | Annealed (soft) / 1/2 hard / Full hard |
| Density | 8.0 g/cm³ |
| Melting Point | 1370–1400 °C |
| Standard | ASTM A213 / A269 / A632 |
| Tolerance | ±0.01 mm (depending on size) |
| Packaging | Plastic tube |
Main Applications
| Industry | Typical Uses |
|---|---|
| Medical & Healthcare | Needles, catheters, endoscopes, biopsy tools |
| Instrumentation | Pressure sensing, thermocouples, signal tubing |
| Microfluidics | Precise liquid transfer, lab analysis |
| Aerospace & Automotive | Sensor lines, fuel sampling tubes |
| Chemical & Petrochemical | Corrosive fluid pipelines, monitoring systems |
| Electronics | Fiber optic protection, battery systems |
| Industrial Automation | Pneumatic control, miniature guide tubes |
Product Attributes
| Attribute | Value |
|---|---|
| Grade | 316L Stainless Steel |
| Surface | Bright / Clean / Polished |
| Wall Thickness | ≥0.5 mm |
| Minimum OD | 0.3 mm |
| Hardness | Soft / 1/2 Hard / Hard |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Corrosion Resistance | Excellent (chlorides, acids, seawater) |
| Form | Straight Tube / Coil / Cut-to-Length |
| Color | Metallic Silver |
| Customization | OD / ID / Wall Thickness / Length / Tolerance |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.