Hypodermic SS 304 Tubing Manufacturer & Supplier
304 stainless steel hypodermic tubing, also known as UNS S30400 / 1.4301, is known as the workhorse of the 300-series alloys. It is an ultra-fine hypotube known for its outstanding properties of cold-working and heavy load-handling ability, as well as inexpensive performance. Being an 18-8 alloy, its corrosion resistance is based on a high percentage of chromium and nickel that create a self-forming layer. Due to the non-hardenability of austenitic alloys through heat treatment, these micro-tubings achieve their high resistance to stretching and crushing using cold drawing processes. Such properties aid excellent performance during cutting operations, including EDM, laser cutting, and grinding. As a trusted Indian manufacturer, Amardeep Steel Centre LLP supplies custom-drawn and straight-length Grade 304 micro-tubing directly from our
Mumbai warehouse. Our integrated supply chain supports rapid global dispatch with mill-certified quality assurance on every order.
Technical Data
Technical Specifications of Hypodermic SS 304 Tubes
| Parameter | Specifications and Available Options |
|---|---|
| Material Grade | Stainless Steel 304 (UNS S30400 / Werkstoff 1.4301) and 304L stainless steel tubing |
| Manufacturing Standards | ASTM A269 seamless tubes, ASTM A632, ISO 9626, DIN 17458 |
| Gauge Sizes | 6 Gauge down to 33 Gauge |
| Outer Diameter Range | 0.20 mm to 5.16 mm (0.008 inch to 0.203 inch) |
| Wall Thickness Options | Regular Wall (RW), Thin Wall (TW), Extra Thin Wall (XTW) |
| Temper Conditions | Full Hard Temper, Half Hard, Bright Annealed (BA) |
| Surface Finish | Smooth passivated outer surface; Ultra-clean inner surface (Ra ≤ 0.4 microns) |
| Product Form | Cut-to-length straight tubes, micro coils, or custom-fabricated needle points |
| Construction | Strip formed, TIG welded and drawn over a floating plug, giving a uniform wall and a smooth bore that is seamless in appearance and performance |
Chemical Composition of Stainless Steel 304 Hypodermic Tubing
| Element | Minimum Percentage | Maximum Percentage |
|---|---|---|
| Chromium (Cr) | 18.00 | 20.00 |
| Nickel (Ni) | 8.00 | 10.50 |
| Carbon (C) | 0.00 | 0.08 |
| Manganese (Mn) | 0.00 | 2.00 |
| Silicon (Si) | 0.00 | 0.75 |
| Phosphorus (P) | 0.00 | 0.045 |
| Sulfur (S) | 0.00 | 0.030 |
| Iron (Fe) | Balance | Balance |
Mechanical Property of Hypodermic SS 304 Tubing
| Temper Condition | Tensile Strength (MPa) | Tensile Strength (PSI) | Hardness Range | Primary Fabrication Characteristic |
|---|---|---|---|---|
| Full Hard Temper | 900 to 1300 | 130,000 to 188,000 | Rockwell C 30 to C 40 | Rigid, non flexing, high column strength for needle penetration |
| Half Hard Temper | 750 to 950 | 108,000 to 138,000 | Rockwell B 85 to C 25 | Moderately formable while retaining structural stiffness |
| Bright Annealed (Soft) | 515 min | 75,000 min | Rockwell B 80 max | Highly ductile, easy coiling, flaring, and complex tube bending |
Custom Micro Fabrication Services
Amardeep Steel provides secondary fabrication operations for micro tubing to deliver ready-to-assemble components. Refer to our comprehensive stainless steel metal fabrication guide to learn more about our process control.
- Burr-Free Precision Cutting: Electrochemical cutting, laser cutting, and wire EDM processes ensure clean, square tube ends without internal diameter constriction.
- Point Style Grinding: Custom bevel grinding including lancet points, tri-bevel needle tips, bias cuts, and closed-end slotting.
- Forming Capabilities: Swaging, flaring, expanding, coiling, threading, and micro bending.
- Assembly Interfacing: Seamless integration with micro fittings and high pressure forged fittings for instrumentation setups.
Applications of SS304 Hypodermic Tubing
- Medical Devices and Surgical Equipment: Intracutaneous needles, biopsy needles, cannulas, catheter ports, and endoscopic tools.
- Analytical Chemistry and Lab Instruments: High-pressure liquid chromatography (HPLC) tubes, autosampler needles, gas chromatographic capillary tubes, and minuscule dosing tubes.
- Industrial Measurements: Pressure sensor capillary tubes, tiny heat sensors, pilot lights, and precise grease meters.
- Aviation and Micro Electronics: Chemical micro hoses, cooling pipes, and solder nozzles.
Related Products
- SS 304L Pipes & Tubes
- SS 304 Micro Tubing
- SS 304 Coil Tubing
- SS 304 Flanges
- SS 304 Buttweld Fittings
- SS 304 Forged Fittings
Frequently Asked Questions
What is the difference between standard stainless steel tubing and hypodermic tubing?
Standard stainless steel tubing is specified using nominal metric or fractional outside diameters and standard wall schedules. Hypodermic tubing is produced according to the Stubs Iron Wire Gauge system, featuring ultra-small dimensions, micro tolerances, rigid cold-drawn tempers, and extremely clean interior surfaces suitable for precision fluid movement or piercing.
Why is Grade 304 preferred over Grade 316 for hypodermic needle manufacturing?
Grade 304 work hardens effectively during cold drawing, allowing the tubing to achieve exceptionally high tensile strength and puncture resistance without becoming brittle. Grade 316 is selected primarily for environments exposed to harsh chloride solutions or aggressive chemical acids.
How does Amardeep Steel ensure tube ends remain clear after cutting?
We employ specialised electrochemical and precision abrasive cutting techniques that eliminate interior metal burrs, ensuring the internal diameter remains completely open for uninterrupted liquid or gas flow.
What drawing method is used to manufacture SS304 hypodermic tubes?
Our hypodermic tubing is manufactured using a TIG-welded and plug-drawn process (welded and drawn). Flat stainless steel strip stock is precision formed, seam welded, and subsequently cold drawn over a floating plug die. This integrates the weld seam into the matrix of the metal, resulting in a tube that is seamless in appearance with uniform wall thickness and a smooth inner diameter finish.
Can SS304 hypodermic tubing withstand high pressure applications despite thin wall profiles?
Yes. Because our hypodermic tubes are cold drawn to full hard or half hard temper states, their hoop strength and yield strength are exceptionally high. Smaller outer diameter capillary tubes can withstand significant internal operating pressures, making them suitable for HPLC chromatography columns and precision hydraulic control lines.
Ready to place an order? Submit your required gauge size, wall thickness profile, temper state, and custom cut lengths via our online inquiry form to receive an instant price quote within 2 working hours.
