China Stainless Steel
stainless steel
capillary tube
TeCarve’s Stainless Steel Capillary Tube solutions are designed for high-precision applications that demand tight tolerances, superior cleanliness, and corrosion resistance.
These ultra-fine tubes are widely used in medical devices, analytical instruments, sensors, thermocouples, and fluid transport systems. Manufactured with extreme dimensional accuracy, they ensure consistent flow control, structural integrity, and excellent mechanical performance in small-diameter configurations.
Available in seamless and welded forms, TeCarve’s capillary tubes are made from high-purity stainless steel to meet critical industry standards and offer long service life even in harsh or sterile environments.
Specifications
Available Sizes by Standard
Markets: N. America — small-diameter seamless & welded tube for general/instrumentation service
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 1.59 | 0.20 | +0.05mm / -0.000mm | ±10.0% |
| 2.38 | 0.28 | +0.08mm / -0.000mm | ±10.0% |
| 3.18 | 0.35 | +0.08mm / -0.000mm | ±10.0% |
| 4.76 | 0.49 | +0.10mm / -0.000mm | ±10.0% |
| 6.35 | 0.71 | +0.10mm / -0.000mm | ±10.0% |
| 7.94 | 0.89 | +0.10mm / -0.000mm | ±10.0% |
| 9.53 | 0.89 | +0.10mm / -0.000mm | ±10.0% |
| 12.70 | 1.24 | +0.10mm / -0.000mm* | ±10.0% |
Sub-1mm precision capillary (down to 0.11mm OD) is custom-manufactured beyond these published standard tables — inquire for full range.
- Supply Length / Form: Coils or straight cut lengths; custom lengths available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 430, 904L, duplex 2205, etc.
- Surface Finish: Bright annealed or polished, ID/OD both pickled & passivated
- Tolerance Compliance: Per ASTM A632, EN 10216-5, JIS G3459, or GB/T 18457 small-diameter tolerance tables
Markets: Europe, Middle East — small-diameter precision & instrumentation tube
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6.0 | 1.0 | ±0.15mm (±2.5%) | ±0.13mm (±12.5%) |
| 8.0 | 1.0 | ±0.15mm (±1.9%) | ±0.13mm (±12.5%) |
| 10.0 | 1.5 | ±0.15mm (±1.5%) | ±0.19mm (±12.5%) |
| 12.0 | 1.5 | ±0.15mm (±1.3%) | ±0.19mm (±12.5%) |
| 14.0 | 1.5 | ±0.15mm (±1.1%) | ±0.19mm (±12.5%) |
| 17.2 | 2.0 | ±0.20mm (±1.2%) | ±0.25mm (±12.5%) |
| 21.3 | 2.3 | ±0.20mm (±0.9%) | ±0.29mm (±12.5%) |
Sub-1mm precision capillary (down to 0.11mm OD) is custom-manufactured beyond these published standard tables — inquire for full range.
- Supply Length / Form: Coils or straight cut lengths; custom lengths available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 430, 904L, duplex 2205, etc.
- Surface Finish: Bright annealed or polished, ID/OD both pickled & passivated
- Tolerance Compliance: Per ASTM A632, EN 10216-5, JIS G3459, or GB/T 18457 small-diameter tolerance tables
Markets: Japan, Southeast Asia — small-diameter precision tube (Sch10S series, small sizes)
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 6.0 | 1.0 | ±0.30mm (±5.0%) | ±0.13mm (±12.5%) |
| 8.0 | 1.0 | ±0.30mm (±3.8%) | ±0.13mm (±12.5%) |
| 10.0 | 1.2 | ±0.30mm (±3.0%) | ±0.15mm (±12.5%) |
| 12.7 | 1.65 | ±0.30mm (±2.4%) | ±0.21mm (±12.5%) |
| 15.0 | 1.65 | ±0.30mm (±2.0%) | ±0.21mm (±12.5%) |
| 17.3 | 1.65 | ±0.30mm (±1.7%) | ±0.21mm (±12.5%) |
Sub-1mm precision capillary (down to 0.11mm OD) is custom-manufactured beyond these published standard tables — inquire for full range.
- Supply Length / Form: Coils or straight cut lengths; custom lengths available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 430, 904L, duplex 2205, etc.
- Surface Finish: Bright annealed or polished, ID/OD both pickled & passivated
- Tolerance Compliance: Per ASTM A632, EN 10216-5, JIS G3459, or GB/T 18457 small-diameter tolerance tables
Markets: China domestic & Belt-and-Road — seamless steel tube for instrumentation
| OD (mm) | WT (mm) | OD Tol. | WT Tol. |
|---|---|---|---|
| 3 | 0.5 | ±0.10mm (±3.3%) | ±0.06mm (±12.5%) |
| 4 | 0.5 | ±0.10mm (±2.5%) | ±0.06mm (±12.5%) |
| 6 | 1.0 | ±0.10mm (±1.7%) | ±0.13mm (±12.5%) |
| 8 | 1.0 | ±0.10mm (±1.3%) | ±0.13mm (±12.5%) |
| 10 | 1.5 | ±0.10mm (±1.0%) | ±0.19mm (±12.5%) |
| 12 | 1.5 | ±0.12mm (±1.0%) | ±0.19mm (±12.5%) |
| 14 | 2.0 | ±0.14mm (±1.0%) | ±0.25mm (±12.5%) |
| 16 | 2.0 | ±0.16mm (±1.0%) | ±0.25mm (±12.5%) |
| 18 | 2.0 | ±0.18mm (±1.0%) | ±0.25mm (±12.5%) |
| 20 | 2.5 | ±0.20mm (±1.0%) | ±0.31mm (±12.5%) |
| 25 | 2.5 | ±0.25mm (±1.0%) | ±0.31mm (±12.5%) |
Sub-1mm precision capillary (down to 0.11mm OD) is custom-manufactured beyond these published standard tables — inquire for full range.
- Supply Length / Form: Coils or straight cut lengths; custom lengths available
- Available Grades: 304, 304L, 316, 316L, 321, 310S, 317L, 430, 904L, duplex 2205, etc.
- Surface Finish: Bright annealed or polished, ID/OD both pickled & passivated
- Tolerance Compliance: Per ASTM A632, EN 10216-5, JIS G3459, or GB/T 18457 small-diameter tolerance tables
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-10.5 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 310S | S31008 | 1.4845 | SUS310S | 06Cr25Ni20 | 0.08 | 1.50 | 2.00 | 0.045 | 0.030 | 24.0-26.0 | 19.0-22.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 317L | S31703 | 1.4438 | SUS317L | 022Cr19Ni13Mo3 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 430 | S43000 | 1.4016 | SUS430 | 10Cr17 | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0-18.0 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 22% | ≤89 HRB / ≤200 HV |
| 904L* | N08904 | 1.4539 | N/A | 015Cr20Ni18Mo6CuN* | 0.020 | 1.00 | 2.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 490 MPa (71 ksi) | 215 MPa (31 ksi) | 35% | ≤90 HRB / ≤200 HV |
| 2205 Duplex* | S32205 | 1.4462 | SUS329J3L* | 022Cr23Ni5Mo3N* | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 655 MPa (95 ksi) | 450 MPa (65 ksi) | 25% | ≤31 HRC / ≤293 HB |
- Standards Conformance: ASTM A632 · EN 10216-5 · JIS G4305/G3459 · GB/T 18457
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
- Cross-Reference Note: 2205 duplex and 904L JIS/GB cross-reference figures are compiled from secondary industry sources — please confirm exact specification and heat-specific mill test certificate with TeCarve for critical applications.
Features
• Micro-diameter precision
• Clean, smooth inner and outer surfaces
• Excellent corrosion resistance
• High-pressure resistance and flexibility
• Medical catheters and instruments
• Laboratory and analytical equipment
• Temperature and pressure sensors
• Microfluidic and aerospace systems
Applications
For precision capillary-tube sourcing, use our factory-audit and quality-control checklist to review equipment, dimensional inspection, material traceability, and supporting documents before production.
Quality Control
• 100% dimensional and tolerance verification
• Surface cleanliness and micro-deburring inspections
• Non-destructive eddy current testing
• ISO and third-party certifications available
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Capillary Tube Production & Quality Photos
Real factory, inspection, packaging and loading photos from TeCarve gallery pages.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We tailor stainless steel capillary tube by micro-diameter, wall thickness, coil or cut length, grade, polished or bright-annealed finish, tube type, and the dimensional tolerances required by the application.
Low MOQ & Rapid Prototyping
MOQ for capillary tube is as low as 100 pieces per size/spec for trial orders, with small batch customization and sample production supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
Most orders ship within 10–25 days after deposit. Exact timing depends on product specification, required documentation, and order volume.
Global Logistics & On-Time Delivery
For capillary tube shipments to over 50 countries, anti-corrosion and moisture protection is emphasized alongside custom barcoding and labeling for precise package identification.
Frequently Asked Questions
What is stainless steel capillary tube used for?
Stainless steel capillary tube is used in medical devices (catheters, endoscopes, surgical tools), scientific instruments, HVAC refrigeration systems, automotive sensors, and analytical laboratory equipment where precise small-diameter tubing with tight tolerances is required.
What is the OD range for stainless steel capillary tube?
TeCarve supplies stainless steel capillary tubes with outer diameter from 0.11 mm to 5 mm and wall thickness from 0.03 mm to 1.0 mm. OD tolerances of ±0.01 mm are achievable for medical and scientific precision applications.
What grades of stainless steel are used for capillary tubes?
Common grades are 304, 316L, 316, and 321. Grade 316L is preferred for medical and pharmaceutical use due to its biocompatibility and resistance to sterilization agents. Electropolished inner and outer surfaces are available for cleanroom and medical applications.
What is the maximum continuous length for capillary tube?
Straight capillary tubes are available up to 6 m. Coiled capillary tube can be supplied in continuous coils exceeding 100 m, eliminating joints for applications requiring long, leak-free runs such as refrigeration and instrumentation.
What documentation is available for medical capillary tube projects?
Documentation requirements depend on the intended application and order specification. Contact TeCarve to confirm which material certificates, inspection records, and traceability documents can be supplied for your project.