Medical Grade Capillary Stainless Steel Tubing Small Diameter Corrosion Resistant Precision Steel Tube
Capillary Stainless Steel Tubing 316 Small Diameter Stainless Steel Pipe for Medical Applications
Material
This product is a precision capillary stainless steel tubing manufactured from AISI 316 austenitic stainless steel. It is designed for applications requiring extremely small diameters, high dimensional accuracy, and excellent corrosion resistance. Thanks to its molybdenum content, 316 stainless steel offers superior resistance to pitting and crevice corrosion, making it especially suitable for medical and pharmaceutical environments.
Specifications
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Outer Diameter (OD): 0.3 mm – 6.0 mm
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Wall Thickness (WT): 0.05 mm – 1.0 mm
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Length: Fixed length or coil length as required
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Manufacturing Process: Cold drawn, precision annealed
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Surface Finish: Bright annealed (BA), pickled, or polished
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Straightness & Roundness: High-precision medical-grade tolerance
Key Features
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Ultra-small diameter with consistent wall thickness
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Excellent corrosion resistance in saline and biological environments
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Smooth internal surface suitable for fluid transfer and injection
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High cleanliness, easy to sterilize
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Good formability for bending and micro-fabrication
Our Advantages
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Biocompatibility assurance: Medical customers are highly concerned about material safety. 316 stainless steel is widely recognized for its biocompatibility and suitability for medical devices and implants.
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Dimensional precision: Small diameter tubing often faces issues of ovality and wall inconsistency. Our advanced cold-drawing and inspection processes ensure tight tolerances and repeatable accuracy.
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Surface quality control: Medical users prioritize internal smoothness to avoid contamination and fluid resistance. We provide controlled surface roughness and optional electropolishing.
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Clean manufacturing environment: Tubes are produced and packaged under strict cleanliness standards to reduce the risk of particulate contamination.
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Stable supply and customization: Flexible production capability supports customized sizes, lengths, and surface finishes for different medical applications.
Chemical Composition
| Grade | C | Mn | Si | Cr | Ni | Mo | P | S |
|---|---|---|---|---|---|---|---|---|
| AISI 316 | ≤0.08 | ≤2.00 | ≤1.00 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | ≤0.045 | ≤0.030 |
| AISI 316L | ≤0.03 | ≤2.00 | ≤1.00 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | ≤0.045 | ≤0.030 |
| AISI 304 | ≤0.08 | ≤2.00 | ≤1.00 | 18.0–20.0 | 8.0–10.5 | — | ≤0.045 | ≤0.030 |
| AISI 304L | ≤0.03 | ≤2.00 | ≤1.00 | 18.0–20.0 | 8.0–12.0 | — | ≤0.045 | ≤0.030 |
| AISI 321 | ≤0.08 | ≤2.00 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | ≤0.045 | ≤0.030 |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| AISI 316 | ≥515 | ≥205 | ≥40 | ≤217 HB |
| AISI 316L | ≥485 | ≥170 | ≥40 | ≤217 HB |
| AISI 304 | ≥515 | ≥205 | ≥40 | ≤201 HB |
| AISI 304L | ≥485 | ≥170 | ≥40 | ≤201 HB |
| AISI 321 | ≥515 | ≥205 | ≥40 | ≤217 HB |
Applicable Standards
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ASTM: ASTM A269, ASTM A213
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EN: EN 10216-5, EN 10305-4
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JIS: JIS G3459
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GB: GB/T 14976
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GOST: GOST 9941
Application Fields
General Application Areas
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Medical and healthcare
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Pharmaceutical processing
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Precision instrumentation
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Laboratory and analytical equipment
Specific Uses in Medical Field
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Hypodermic needles and cannulas
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Catheters and minimally invasive surgical instruments
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Medical fluid delivery and micro-dosing systems
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Diagnostic and laboratory tubing
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Implantable and auxiliary medical device components
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,
it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Get in Touch
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