Hypodermic SS 316 Tubing Manufacturer & Supplier
SS 316 hypodermic tubing is a specialised, thin-walled tube designed for high-speed fluid transport, drug delivery, and fluid removal purposes in various medical applications. Made of high-quality molybdenum-containing austenitic stainless steel (16–18% Cr, 10–14% Ni, 2–3% Mo), it is comparatively superior to regular 304 tubes in terms of resistance to chloride pitting and localised corrosion. The process of making the hypodermic tubing includes forming high-quality steel strips in a tube form; seams are developed by TIG, and the tube is cold-worked continuously to ensure minimized tolerances and optimised surface quality. The tensile strength of hypodermic tubing is 515MPa ensuring reliability for high-pressure applications. Hypodermic tubing is available in both hard-drawn and annealed conditions to form hypodermic needles, lancets, and laboratory devices as well as aerospace fluid lines. In India, Amardeep Steel Centre LLP has established itself as the top manufacturer and dealer of SS316 hypodermic tubing, providing customised products and quick shipments along with complete EN10204 3.1 certification.
What Is 316 Stainless Steel Hypodermic Tubing?
316 stainless steel hypodermic tubing is referred to as precision micro tubing based on austenitic stainless steel that possesses molybdenum and complies with either UNS S31600 or UNS S31603 specifications. The creation process includes forming a stainless steel strip of high purity into tubing, welding it together by the longitudinal TIG method, and then drawing it continuously through cold redrawing stages with the use of internal mandrels. The cold redrawing leads to grain refinement, inner weld seam disappearance, a smooth surface of the bore, and exact measurement. While simple industrial tubes are defined by nominal pipe sizes (NPS), the hypodermic tubing from stainless steel 316 is classified according to the Stubs Steel Wire Gauge standard (from 6 gauge to 33 gauge). It guarantees the highest levels of cleanliness and ductility as well as strict adherence to dimensioning, which makes the use of this microtubing safe and leak-proof in sensitive medical equipment and in biopharmaceutical and analytical systems.
You can review our related product offerings, such as 316 stainless steel pipes and tubes for standard fluid transport lines, or explore our low-carbon 316L stainless steel pipes and tubes for welded assemblies.
Technical Data
Specifications for SS 316 Needle Tubing
| Specification | Details |
|---|---|
Standard Specifications | ASTM A269, ASTM A632, ASTM A908, ISO 9626, ISO 15510 |
Material Grade | Stainless Steel 316 — UNS S31600 — Werkstoff 1.4401 or Stainless Steel 316L — UNS S31603 — Werkstoff 1.4404 |
Gauge Range | 6 gauge to 33 gauge, including custom non-standard sizes |
Outside Diameter Range | 0.008 inch to 0.203 inch (0.21 mm to 5.16 mm) |
Inside Diameter Range | 0.004 inch to 0.173 inch (0.11 mm to 4.39 mm) |
Tubing Condition | Seamless, cold-drawn, full hard, half-hard, annealed, bright annealed |
Surface Roughness | Internal surface roughness Ra 0.25 micrometre or smoother, on request |
Standard Lengths | 6 feet, 10 feet, 20 feet, or cut to specific custom lengths |
Certifications | EN 10204 3.1 MTC, ISO 9001:2015, NABL laboratory test reports |
Standard Hypodermic SS 316 Tubing Gauge Chart
| Gauge Size | Nominal Outside Diameter inch | Nominal Outside Diameter mm | Nominal Inside Diameter inch | Nominal Inside Diameter mm | Wall Thickness mm |
|---|---|---|---|---|---|
6 Gauge | 0.203 | 5.16 | 0.173 | 4.39 | 0.38 |
8 Gauge | 0.165 | 4.19 | 0.135 | 3.43 | 0.38 |
10 Gauge | 0.134 | 3.40 | 0.106 | 2.69 | 0.36 |
12 Gauge | 0.109 | 2.77 | 0.085 | 2.16 | 0.30 |
14 Gauge | 0.083 | 2.11 | 0.063 | 1.60 | 0.25 |
16 Gauge | 0.065 | 1.65 | 0.047 | 1.19 | 0.23 |
18 Gauge | 0.050 | 1.27 | 0.033 | 0.84 | 0.21 |
20 Gauge | 0.035 | 0.91 | 0.023 | 0.60 | 0.15 |
22 Gauge | 0.028 | 0.72 | 0.016 | 0.41 | 0.15 |
25 Gauge | 0.020 | 0.51 | 0.010 | 0.26 | 0.13 |
27 Gauge | 0.016 | 0.41 | 0.008 | 0.21 | 0.10 |
30 Gauge | 0.012 | 0.31 | 0.006 | 0.16 | 0.08 |
33 Gauge | 0.008 | 0.21 | 0.004 | 0.11 | 0.05 |
For larger instrumentation lines and structural precision tubing, view our complete guide on ASTM A269 seamless tubes.
Chemical Composition of SS 316 Hypodermic Tubing
| Element | Weight Percentage Grade 316 | Weight Percentage Grade 316L |
|---|---|---|
Carbon C | 0.08 maximum | 0.03 maximum |
Manganese Mn | 2.00 maximum | 2.00 maximum |
Silicon Si | 0.75 maximum | 0.75 maximum |
Phosphorus P | 0.045 maximum | 0.045 maximum |
Sulfur S | 0.030 maximum | 0.030 maximum |
Chromium Cr | 16.0 to 18.0 | 16.0 to 18.0 |
Molybdenum Mo | 2.00 to 3.00 | 2.00 to 3.00 |
Nickel Ni | 10.0 to 14.0 | 10.0 to 14.0 |
Our raw strip stock is processed to precise chemical purity before draw operations begin. You can read more about raw material stock on our page covering stainless steel 316 plates and sheets.
Mechanical Properties of Stainless Steel 316 Hypodermic Tubing
| Mechanical Property | Annealed Temper | Full Hard Temper |
|---|---|---|
Tensile Strength Minimum | 515 MPa 75 ksi | 965 MPa 140 ksi |
Yield Strength Minimum | 205 MPa 30 ksi | 760 MPa 110 ksi |
Elongation in 50 mm | 40 percent minimum | 5 per cent minimum |
Hardness Maximum | 90 HRB | 35 HRC |
Dimensional Tolerances & Pressure Ratings for 316 Stainless Steel Hypodermic Tubing
| Gauge Size | OD Tolerance | ID Tolerance | Wall Tolerance | Working Pressure PSI | Theoretical Burst Pressure PSI |
|---|---|---|---|---|---|
6 Gauge | +/- 0.002 inch +/- 0.05 mm | +/- 0.002 inch +/- 0.05 mm | +/- 10 percent | 3800 PSI | 15200 PSI |
10 Gauge | +/- 0.0015 inch +/- 0.038 mm | +/- 0.0015 inch +/- 0.038 mm | +/- 10 percent | 5200 PSI | 20800 PSI |
14 Gauge | +/- 0.001 inch +/- 0.025 mm | +/- 0.001 inch +/- 0.025 mm | +/- 10 percent | 6100 PSI | 24400 PSI |
18 Gauge | +/- 0.00075 inch +/- 0.019 mm | +/- 0.00075 inch +/- 0.019 mm | +/- 8 percent | 7800 PSI | 31200 PSI |
20 Gauge | +/- 0.0005 inch +/- 0.013 mm | +/- 0.0005 inch +/- 0.013 mm | +/- 8 percent | 8500 PSI | 34000 PSI |
25 Gauge | +/- 0.0005 inch +/- 0.013 mm | +/- 0.0005 inch +/- 0.013 mm | +/- 5 percent | 10200 PSI | 40800 PSI |
30 Gauge | +/- 0.0005 inch +/- 0.013 mm | +/- 0.0005 inch +/- 0.013 mm | +/- 5 percent | 12500 PSI | 50000 PSI |
Why Choose SS316 Over SS304 for Hypodermic Tubing
| Feature or Property | Stainless Steel 316 Hypodermic Tube | Stainless Steel 304 Hypodermic Tube | Advantage of Grade 316 |
|---|---|---|---|
Molybdenum Content | 2.0 to 3.0 percent | None | Superior protection against chloride pitting |
Pitting Resistance PREN | 24 to 26 | 18 to 20 | Higher durability in saline and acidic fluids |
Biocompatibility | Excellent for body contact | Good for general tools | Reduces risk of tissue reaction and localised corrosion |
Chemical Resistance | High resistance to chlorides and solvents | Moderate resistance | Prevents micro pitting in analytical flow paths |
Industrial Applications of Stainless Steel 316 Hypodermic Tubing
- Medical Devices and Surgical Instruments: Hypodermic needles, biopsy needles, cannulas, dental tools and subcutaneous fluid delivery systems.
- Chromatography and Analytical Equipment: HPLC column tubing, sample loops, gas chromatography lines and microfluidic liquid handling systems.
- Biopharmaceutical Processing: Sterile fluid transfer lines, dosing nozzles, and micro injection systems.
- Instrumentation and Sensors: Sheaths for thermocouples, pressure transducers, flow meter sensors and aerospace micro probes.
Frequently Asked Questions
What is hypodermic SS 316 tubing?
Hypodermic SS 316 tubing is a cold-drawn, micro-small-diameter stainless steel tube characterised by tight dimensional tolerances, precise gauge wall thicknesses and enhanced corrosion resistance due to its molybdenum content.
What is the difference between hypodermic tubing and standard capillary tubing?
Hypodermic tubing is drawn to strict tube gauge sizes with high surface finish standards, specifically designed for needle fluid injection and high-precision instruments. Capillary tubing refers generally to any small-bore tube used for fluid control.
Can hypodermic SS 316 tubing be welded?
Yes, Grade 316 hypodermic tubing can be welded using laser, TIG or electron beam welding methods. For heavily welded assemblies, Grade 316L is often recommended to prevent carbide precipitation.
What standard lengths are available?
We supply hypodermic tubing in standard straight lengths of 6 feet, 10 feet, and 20 feet as well as precision-cut, burr-free pieces according to client requirements.
Request a Quote for Hypodermic SS 316 Tubing
Amardeep Steel Centre maintains an extensive ready stock of hypodermic SS 316 tubing in Mumbai for quick delivery across India and international markets. Contact our technical sales team today with your gauge size, wall thickness, temper and quantity specifications to receive a competitive price quotation.
Related Products
316 family: SS 316 Pipes & Tubes, SS 316L Pipes & Tubes, ASTM A269 Seamless Tubes, SS 316 Plates & Sheets, SS 304 Seamless Capillary Tubes
