Stainless steel capillary tube
Jianglin offers stainless steel capillary tubes with small diameters and tight tolerances, ideal for precision applications requiring smooth surfaces. We can also cut tubes to your desired length.
Stainless steel capillary tube product list
As a trusted SS capillary tube supplier in China, Jianglin has served over 2,000 customers and built long-term partnerships with them. Medical device manufacturers and others depend on our ability to deliver reliable, safe, and efficient capillary tube solutions.
Product Specifications
Chemical composition (%)
Mechanical properties
Chemical composition (%)
| Element | 201 | 202 | 301 | 304 | 316 | 430 |
|---|---|---|---|---|---|---|
| C | ≤0.08 | ≤0.06 | ≤0.06 | ≤0.06 | ≤0.08 | ≤0.12 |
| S | ≤0.02 | ≤0.02 | ≤0.03 | ≤0.03 | ≤0.03 | ≤0.03 |
| P | ≤0.060 | ≤0.060 | ≤0.045 | ≤0.035 | ≤0.045 | ≤0.040 |
| Mn | 8.5-10.5 | 8.5-10.5 | ≤2.00 | ≤2.00 | ≤2.00 | ≤1.00 |
| Si | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 |
| Cr | 14-15 | 14-16 | 16-18 | 17-20 | 16-18 | 16-18 |
| Ni | 0.8-1.2 | 4-6 | 4-7 | 8-12 | 12-16 | ≤0.05 |
Mechanical properties
| Mechanical Property | 201 | 202 | 304 | 316 |
|---|---|---|---|---|
| Tensile Strength (MPa) | ≥535 | ≥520 | ≥520 | ≥520 |
| Yield Strength (MPa) | ≥245 | ≥205 | ≥205 | ≥205 |
| Elongation (%) | ≥30% | ≥30% | ≥35% | ≥35% |
| Hardness (HV) | <105 | <100 | <90 | <90 |
Size Range & Dimension
Grade & Application
Size Range & Dimension
| Gauge | Outside Diameter (mm) | Regular Wall (RW) (mm) | Thin Wall (TW) (mm) | Extra Thin Wall (XTW) (mm) | Ultra-Thin Wall (UTW) (mm) | Dimensional Precision (Tolerance) |
|---|---|---|---|---|---|---|
| 30 | 0.304 – 0.317 | 0.064 – 0.089 | — | — | — | OD: ±0.02 mm, WT: ±10% |
| 27 | 0.406 – 0.419 | 0.089 – 0.115 | 0.064 – 0.089 | — | — | OD: ±0.02 mm, WT: ±10% |
| 24 | 0.558 – 0.571 | 0.114 – 0.140 | 0.089 – 0.114 | 0.051 – 0.102 | — | OD: ±0.03 mm, WT: ±10% |
| 22 | 0.711 – 0.723 | 0.140 – 0.165 | 0.096 – 0.121 | 0.077 – 0.102 | 0.051 – 0.102 | OD: ±0.03 mm, WT: ±10% |
| 18 | 1.257 – 1.282 | 0.191 – 0.241 | 0.127 – 0.165 | 0.083 – 0.121 | 0.051 – 0.102 | OD: ±0.04 mm, WT: ±10% |
| 14 | 2.082 – 2.133 | 0.216 – 0.292 | 0.165 – 0.229 | 0.114 – 0.165 | 0.076 – 0.134 | OD: ±0.05 mm, WT: ±10% |
Grade & Application
| Material Grade | Common Types | Typical Applications |
|---|---|---|
| 321 | Austenitic (non-magnetic) | High-temperature applications |
| 316 / 316L | Austenitic (non-magnetic) | Medical devices, marine environments, and chemical processing. |
| 304 / 304L | Austenitic (non-magnetic) | General-purpose fluid transfer, food and beverage processing lines. |
| 17-4 PH | Precipitation-Hardening (magnetic) | High-pressure hydraulic lines |
| 410 | Martensitic (magnetic) | Precision mechanical parts, pins |
Quality Certification
More Details About Jianglin Stainless Steel Capillary Tube
Key Features of Stainless Steel Capillary Tube
We have an independent chemical composition laboratory
We use advanced manufacturing machines
We have up to 20 tons of capillaries in stock
Through hot rolling step to make it tougher.
80% of our machines are produced with automation technology and intelligent detection keeps production quality.
How is Capillary Tube Made?
- Step 1, Pipe Forming and Welding: Rolled stainless steel sheets are fed into a welding machine for forming. TIG (Tungsten Inert Gas) welding is used to produce precise, high-strength seams.
- Step 2, Stretching and Shrinking: After welding, tubes are stretched through a mould to precisely control outer diameter, wall thickness, and surface quality. In some cases, a shrinking process (without mandrels) is used to further reduce the tube diameter.
- Step 3, Annealing and Continuous Casting: Tubes are heated above recrystallisation temperature to restore ductility and improve mechanical properties. Continuous casting ensures uniform internal structure and consistent quality.
FAQ
Below are answers to frequently asked questions about stainless steel capillary tubes:
It is a small-diameter stainless steel tube with a narrow inner diameter (0.30 – 25.0 mm) and excellent corrosion resistance.
Yes, we offer free samples to customers worldwide. However, shipping costs are the buyer’s responsibility.
Yes. Customisation is available, and the minimum order is 1 ton.
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