Products Description
Ss Stainless Capillary Tube
Benifits of Ss Stainless Capillary Tube
- High Precision: Ss Stainless Capillary Tube is widely used in instrumentation applications. Its tight dimensional tolerances enable precise flow control.
- Flexibility: Stainless steel capillary tubing offers excellent flexibility due to its small diameter, making it easy to bend and connect within tight, complex equipment spaces.
- Excellent Corrosion Resistance: Made of austenitic stainless steels such as 304, 316, and 316L, it resists corrosion from water, steam, and various chemical media, making it suitable for harsh environments.
Uses of Ss Stainless Capillary Tube
- Medical devices: interventional medical catheters, medical syringes, ventilators, etc.
- Instruments: pressure gauges, transmitters, sensors, and other pressure-supply and measuring tubes
- Precision machinery: pneumatic and hydraulic transmission systems for small equipment, such as precision cylinders
- Aerospace: hydraulic systems, cooling systems, etc.
Chemical Composition
| Element | Carbon | Manganese | Silicon | Phosphorus | Sulfur | Chromium | Nickel | Molybdenum | Titanium |
| SS304 | ≤0.08% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 18.0–20.0% | 8.0–10.5% | – | – |
| SS316 | ≤0.08% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 16.0–18.0% | 10.0–14.0% | 2.0–3.0% | – |
| SS321 | ≤0.08% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% | 17.0–19.0% | 9.0–12.0% | – | ≥5×C |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Elastic Modulus (GPa) |
| SS304 | 215–250 | 515–750 | 40–50 | 201–217 | 193 |
| SS316 | 205–290 | 515–750 | 40–50 | 217–248 | 193 |
| SS321 | 205–250 | 515–750 | 40–50 | 217–248 | 193 |
Physical Properties
| Grade | Density (g/cm³) | Melting Point (°C) | Thermal Conductivity (W/m·K) | Specific Heat (J/g·K) | Electrical Resistivity (μΩ·cm) |
| SS304 | 7.93 | 1400–1450 | 16.2 | 0.500 | 72 |
| SS316 | 7.98 | 1375–1400 | 16.3 | 0.500 | 74 |
| SS321 | 7.98 | 1375–1400 | 17.0 | 0.500 | 74 |
Possible Alternative Grades
- AISI 430: Ferritic stainless steel for moderately corrosive applications.
- AISI 904L: Super-austenitic steel for strong acid environments.
- Duplex stainless steels (S31803, S32750): High strength and excellent resistance to chloride stress corrosion cracking.
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