ASTM A269 Stainless Steel Capillary Tube with Fine-Bore Capability for Corrosion Resistant Syringe Needle Applications
Price:
negotiable
MOQ:
1Ton
Delivery Time:
45-60 days
Brand:
TORICH
Product Description
ASTM A269 201 304 316 Welded Stainless Steel Tube Syringe Needle Tube
Product Overview
ASTM A269 welded stainless steel capillary tube is a precision small-diameter tube used for syringe needle cannulas, medical device components, dosing tubes, and fine fluid-transfer assemblies. For syringe needle manufacturing, buyers normally focus on dimensional stability, inner-bore cleanliness, weld integrity, corrosion resistance, and consistent mechanical performance after cold drawing and heat treatment. Grades 304 and 316/316L are the preferred choices for medical and corrosive-fluid applications, while 201 can be selected for cost-sensitive non-implant or industrial needle-type components.
Specifications
| Material | Austenitic stainless steel |
| Standard | ASTM A269; ISO 9626 available for needle tubing projects; ASTM A213, ASTM A312, ASTM A789, ASTM A790 available upon request where applicable |
| Grade | TP201, TP304, TP304L, TP316, TP316L |
| Outer Diameter | 0.10-219.10 mm; syringe needle capillary sizes can be produced in fine-gauge OD ranges |
| Wall Thickness | 0.05-20.00 mm; thin-wall capillary tube available |
| Length | 1-12 m, cut-to-length or coil form available upon request |
| Tolerance Range | OD: ±0.20 mm standard; wall thickness: ±10% standard; tighter tolerances can be discussed for capillary and needle tubing |
| Straightness | Precision straightened; typical straightness can be controlled according to drawing and final cut length |
| Surface Condition | Bright annealed, pickled, polished, satin, hairline, 400#, 600#, 800#, mirror polished |
| Heat Treatment | Solution annealed / bright annealed depending on grade, size, and surface requirement |
| Tube Type | Welded, welded and drawn, capillary tube, syringe needle tube |
| Testing | Dimensional inspection, visual inspection, hydrostatic or non-destructive electric test where required by ASTM A269 |
Key Features
| Feature | Technical Value for Buyers |
|---|---|
| Fine-bore capability | Suitable for micro-fluid transfer, syringe needle cannulas, dosing needles, and precision dispensing tubes |
| Austenitic corrosion resistance | TP304 provides general corrosion resistance; TP316/316L contains 2.00-3.00% Mo for better resistance in chloride-containing or sterilization-related environments |
| Low-carbon weldability | TP304L and TP316L reduce carbon to max. 0.035%, supporting improved resistance to sensitization after welding or heat exposure |
| Controlled mechanical strength | 304/316 grades typically meet minimum tensile strength of 515 MPa and yield strength of 205 MPa; 304L/316L typically meet minimum tensile strength of 485 MPa and yield strength of 170 MPa |
| Smooth surface options | Bright annealed, polished, and mirror surface finishes help reduce contamination risk and support easier cleaning |
| Small-size needle compatibility | ISO 9626 needle tubing projects can be aligned with metric needle tubing sizes from 3.4 mm to 0.18 mm when required |
| Process flexibility | Welded and drawn processing improves dimensional consistency, surface quality, and concentricity compared with ordinary welded tube |
Our Advantages
| Buyer Concern | Practical Solution |
|---|---|
| "Can welded capillary tubing meet needle-level dimensional control?" | We can control OD, wall thickness, straightness, cutting length, and surface finish according to the buyer's drawing. For syringe needle projects, welded-and-drawn processing is recommended to improve roundness, inner-bore consistency, and surface finish. |
| "How do you reduce risk from weld defects or leakage?" | Production can include visual inspection, dimensional inspection, and hydrostatic or non-destructive electric testing where required. For demanding capillary applications, additional sampling for burst, collapse, straightness, and inner-bore inspection can be arranged. |
| "Which grade should we choose for syringe needle tubing?" | TP304 is suitable for general needle and medical-device components. TP316/316L is recommended where chloride exposure, sterilization environment, or higher corrosion resistance is required. TP201 is mainly recommended for cost-sensitive non-critical or industrial needle-type parts. |
Applicable Standards
| Standard | Scope |
|---|---|
| ASTM A269 | Seamless and welded austenitic stainless steel tubing for general corrosion-resisting and low- or high-temperature service |
| ASTM A213 | Seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes |
| ASTM A312 | Seamless, welded, and heavily cold-worked austenitic stainless steel pipe |
| ISO 9626 | Stainless steel needle tubing for medical device manufacturing |
| EN 10217-7 | Welded stainless steel tubes for pressure purposes |
| JIS G3459 | Stainless steel pipes |
| GB/T 14976 | Stainless steel seamless tubes for fluid transport |
| GOST 9941 | Seamless cold- and heat-deformed corrosion-resistant steel tubes |
Application Field
Disposable hypodermic syringe needle cannula.
Chemical Composition
| Grade | UNS | C max % | Mn % | P max % | S max % | Si max % | Cr % | Ni % | Mo % | N max % |
|---|---|---|---|---|---|---|---|---|---|---|
| TP201 | S20100 | 0.15 | 5.50-7.50 | 0.060 | 0.030 | 1.00 | 16.00-18.00 | 3.50-5.50 | -- | 0.25 |
| TP304 | S30400 | 0.08 | 2.00 max | 0.045 | 0.030 | 1.00 | 18.00-20.00 | 8.00-11.00 | -- | -- |
| TP304L | S30403 | 0.035 | 2.00 max | 0.045 | 0.030 | 1.00 | 18.00-20.00 | 8.00-12.00 | -- | -- |
| TP316 | S31600 | 0.08 | 2.00 max | 0.045 | 0.030 | 1.00 | 16.00-18.00 | 10.00-14.00 | 2.00-3.00 | -- |
| TP316L | S31603 | 0.035 | 2.00 max | 0.045 | 0.030 | 1.00 | 16.00-18.00 | 10.00-15.00 | 2.00-3.00 | -- |
Mechanical Properties
| Grade | Tensile Strength min | Yield Strength min | Elongation min | Hardness |
|---|---|---|---|---|
| TP201 | 685 MPa typical | 292 MPa typical | 56% typical longitudinal | HRB 85 typical |
| TP304 | 515 MPa / 75 ksi | 205 MPa / 30 ksi | 35% | HRB 90 max typical |
| TP304L | 485 MPa / 70 ksi | 170 MPa / 25 ksi | 35% | HRB 90 max typical |
| TP316 | 515 MPa / 75 ksi | 205 MPa / 30 ksi | 35% | HRB 90 max typical |
| TP316L | 485 MPa / 70 ksi | 170 MPa / 25 ksi | 35% | HRB 90 max typical |
Product Images
Frequently Asked Questions
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 <= 2000 USD, 100% in advance. Payment >= 2000 USD, 30% T/T in advance, balance before shipment. If you have another question, please feel free to contact with me.
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Company
TORICH INTERNATIONAL LIMITED
Location
Suite 1604-3, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact Person
Richard SHEN