Medical Stainless Steel Tubing (Small Diameter) for Medical Devices

Material

This product is a precision stainless steel small-diameter tubing designed specifically for medical devices. It is manufactured from medical-grade stainless steels such as 304/304L, 316/316L, and 17-7PH using cold-drawing or seamless production methods. The process ensures ultra-smooth surfaces, excellent dimensional accuracy, high structural integrity, and full biocompatibility.

Specifications

• Outside Diameter (OD): approx. 0.15 mm to 6 mm for miniature medical tubing

• Wall Thickness: from about 0.025 mm and above

• Dimensional Tolerance: OD and wall thickness tolerances can reach ±0.001 in depending on the size

• Available Grades: 304, 304L, 316, 316L, 316LVM, 316Ti, 17-7PH

• Surface Finish: polished or electropolished; internal Ra value can reach ≤0.2 µm

• Form: straight lengths or coils; cut-to-length available

• Production Method: cold drawing, plug drawing, seamless or welded-and-drawn processing

Key Features

• High corrosion resistance and excellent biocompatibility

• Very tight dimensional control for OD/ID and wall uniformity

• Smooth internal surfaces suitable for fluid and gas delivery

• High straightness and consistency for precision assembly

• Suitable for sterilization and repeated clinical use

Our Advantages

1. Tight Tolerances & Straightness

Our production achieves extremely precise OD, ID, and wall thickness control, with tolerances up to ±0.01 mm, meeting demanding medical device requirements such as minimally invasive instruments and catheter systems.

2. Medical-Grade Material Control

All stainless steel materials are fully certified, traceable, and compliant with medical manufacturing standards. Each batch undergoes strict inspection to ensure consistency and purity.

3. Superior Surface Cleanliness

Through precision drawing and electropolishing, tubing surfaces maintain minimal contamination and extremely low roughness, essential for medical fluid systems and surgical tools.

4. Advanced Manufacturing Capabilities

We can produce ultra-small inside diameters (as small as 0.13 mm) and ultra-thin walls using cold-drawing and plug-drawing technologies.

5. Full Customization for Medical OEMs

Custom lengths, bending, coiling, flaring, and end-forming are available. Outer diameters can be produced up to 20 mm for special medical assemblies.

6. Compliance with Medical Quality Systems

Production aligns with ISO 13485 requirements, ensuring full documentation, traceability, and process control suitable for medical device manufacturing.

Chemical Composition

Mechanical Properties

Note: Cold-worked medical tubing can achieve significantly higher strengths than annealed sheet/bar material.

Standards Compliance

• ASTM F2181 – Seamless stainless steel tubing for surgical implants

• ASTM A269 – Seamless and welded austenitic stainless steel tubing

• ISO 9626 – Stainless steel needle tubing for medical devices

• ISO 13485 – Medical device quality management system

Application Areas

General Use

Designed for medical device manufacturing requiring miniature, high-precision, corrosion-resistant stainless steel tubing.

Specific Applications

• Catheter shafts, cannulas, and delivery systems

• Hypodermic needles, syringe components, and micro-fluid channels

• Surgical and minimally invasive instruments (endoscopic, arthroscopic, etc.)

• Orthopedic and implantable device components

• Diagnostic equipment fluid lines and analytical micro-tubing

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.

Who We are ?

-------A professional steel pipes materials inventor, manufacturer and solution provider
Torich International Limited is a professional manufacturer and exporter of steel pipes materials. It is an international marketing and sales company specialized in steel tubes, which holds the factories of Seamless Steel Tubes with Carbon and Alloy Steel Grade, Welded Precision Steel Tubes,DOM Steel Tubes, Seamless & Welded Stainless Steel Tubes with Nickel and Alloy Steel Grade.
Our factory was established since 1997, with the name of TORICH INTERNATIONAL LIMITED. The factories’ technicians are of great engineering experience in steel pipe industry for more than 20 years, which are in great command of production technology for Cold Drawing and Cold Rolling. So we have strong technician team and manufacturing capability.

What products we do?

------- Invent and produce various Precision Steel Pipes

Our steel pipes cover the following ranges:
Seamless Precision Steel Pipes

Bearing Steel Tubes
Welded Precision Steel Pipes, with DOM production
Seamless Heat Exchanger Steel Pipe
Seamless Boiler Steel Pipes

Honed Tubes

Hydraulic Cylinder Steel Tubes

Hydraulic Telescopic Cylinder Tubes
Seamless Structural Steel Pipes
Seamless Mechanical Steel Pipes
Seamless Alloy Steel Tubes & Pipes
Seamless Stainless Steel tubes
Welded Stainless Steel Tubes
Seamless Stainless Steel Tubes & Pipes
Welded Stainless Steel Tubes & Pipes
Seamless Carbon Steel Tubes & Pipes
Nickel Alloy Steel Tubes & Pipes

What TORICH do:
1. Producing Steel Tubes
2. Selling both on Domestic and International Market
3. Precisely Targeting Customers’ Requirement- Sourcing the right factory for right products for Customers

Products Application:
Oil Cylinders
Air Cylinder, 
Automotive Cylinder Liners
Boilers, Pressure Vessels
Shell & Heat Exchangers
Jack Lifting
Telescopic Systems
Pneumatic Cylinders
Agricultural Machineries

Size range is: 
O.D. 4-350mm, 
W.T. 0.5-30mm, 
Length: according to customer’s requirement and agreement
 

Steel Grade:
Carbon Steel Grade:
ST35.8, ST37.0, ST44, ST52;
E155, E195, E215, E235, E275, E355;
195GH, P235GH, P265GH, P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2;
SAE1010, SAE1020, SAE1026, SAE1035, SAE1045;

Carbon steel tube: SA178, A179, A192, A210, SA213, SA214, etc.
Alloy Steel Grade:
T2, T5, T9, T11, T12, T17, T21, T22, T91,T92, 15Mo3,16Mo3, 13CrMo44;
SAE4130, SAE4140, 40Cr, 40Cr4, 10CrMo910, 12CrMo910, 11CrMo910,
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4, 20MnV, 20MnV6,20CrMn;
Carbon steel tube: A179,A192,A210,DIN17175,etc.

Bearing Steel Grades:
GCr15 52100 suj2 suj3 100Cr6 SKF3S SKF3S 20CrNiMo 8620H 4118H;

Nickel Alloy Grade:
N02200/2201, N04400, N06600, N06601, N06625, N06852, N06219, N06690, N08800/8810/8811, N08825, N08028, N08535, N08904, N08925, N08926, N010276, N06022, etc.

Austenitic/Super Austenitic Stainless Steel Grade:
304/304L, 316/316L, 314, 321, 347H, 316Ti, 316LMod, 317L/N, 310S, 253MA, 330, 904L, S31254, XM-19, etc. 

Ferrite/Martensite Stainless Steel Grade:
TP410, TP405, TP420, TP430, TP430Ti, TP403, TP409, TP444, TP439, TP446, etc. 

Duplex/Super Duplex Stainless Steel Grade:
S31803, S32304, S31500, S32550, S32750, S32760, etc. 
Corporate Culture:
We focus on Quality First, Quality Traceability, and Quality Stability!
We focus on Customer First, People First, and Quality-Oriented!
Success:
First factory started in 1997, in the name of Torich , now covers 50000 square meters of factory building, with more than 100employees, and over 45 million RBM assets.
In 2008, we started the company of Torich International Limited for international business and marketing.
Welcome partners from all over the world for long term cooperation!