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Duplex Stainless Steel Capillary Tube...
HM1925
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Duplex Stainless Steel Capillary Tube possesses a duplex structure, a combination of the austenite and ferrite phases. It has high yield strength, up to twice that of austenitic stainless steel. Heeger Materials can provide the best Duplex Stainless Steel Capillary Tube at a competitive price. We can offer S32900, S32750, S31260, S31200, S31500, and S31803 brands. The dimensions can be customized.
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| Materials | S32900, S32750, S31260, S31200, S31500, S31803 |
| Size | customized |
Duplex Stainless Steel Capillary Tube is made of a stainless steel alloy containing chromium and nickel. It is a heat-resistant steel alloy and has good pitting corrosion resistance, crevice corrosion resistance, oxidation resistance, and stress corrosion resistance in chlorine-containing water.


Duplex Stainless Steel Capillary Tube belongs to the refractory metals range and is selected for high-temperature capability, corrosion resistance, controlled dimensions and material-grade consistency. It is commonly used in micro-fluidic, medical, analytical, high-temperature and corrosion-resistant small-tube applications as well as vacuum furnaces, high-temperature hardware, medical and analytical components, aerospace parts and corrosion-resistant assemblies. When requesting a quote, confirm outside diameter, inside diameter, wall thickness, length, tolerance and drawing requirements.
For material comparison or adjacent product forms, browse refractory metals, tantalum products and tungsten products.
What information is needed for capillary or micro tube supply? Please share OD, ID, wall thickness, length, tolerance, surface condition, quantity and any drawing or medical device requirement.
Brand No. | C | Cr | Ni | Mn | Si | Mo | Cu | W | P | S | N |
S32900 | 0.08 | 23-28 | 2.0-5.0 | 1 | 0.75 | 1.0-2.0 | -- | -- | 0.04 | 0.03 | -- |
S32750 | 0.03 | 24-26 | 6-8 | 1.2 | 0.8 | 3-5 | 0.5 | -- | 0.035 | 0.02 | 0.24-0.32 |
S31260 | 0.03 | 24-26 | 5.5-7.5 | 1 | 0.75 | 2.5-3.5 | 0.2-0.8 | 0.1-0.50 | 0.035 | 0.02 | 0.1-0.3 |
S31200 | 0.03 | 24-26 | 5.5-6.5 | 2 | 1 | 1.2-2.0 | -- | -- | 0.045 | 0.03 | 0.14-0.2 |
S31500 | 0.03 | 18-19 | 4.5-5.5 | 1.0-2.0 | 1.3-2.0 | 2.5-3.0 | -- | -- | 0.035 | 0.03 | 0.05-0.12 |
S31803 | 0.03 | 24-26 | 5.5-6.5 | 2 | 1 | 1.2-2.0 | -- | -- | 0.05 | 0.03 | 0.14-2.0 |
Brands No.
| Physical properties | Mechanical Properties & Others | |||||
Density (g/cm3) | Thermal conductivity (W/(m·k) 100~500℃) | Yield Strength | Tensile Strength | Elongation A5 % | Hardness HRB | ||
Rp0.2(MPa) | Rp1.0(Mpa) | Mpa |
|
| |||
S32900 | 7.8 | 15-25 |
| 590 | 390 | 18 | ≤32HRB |
S32750 | 7.8 | 15-25 | 550 | 800 | ≥795 | ≥15 | ≤32HRB |
S31260 | 7.8 | 15-25 |
| 795 | 550 | 30 | ≤32HRB |
S31200 | 7.8 | 15-25 |
| 650 | 450 | 20 | ≤32HRB |
S31500 | 7.8 | 15-25 |
| 630 | 440 | 30 | ≤30HRB |
S31803 | 7.8 | 15-25 |
| 450 | 620 | 20 | ≤30HRB |
Dimension | OD: 0.2-6 mm |
WT: 0.02-2 mm | |
Note: The dimensions can be tailored according to specific requirements. | |
Duplex Stainless Steel Capillary Tube will be packaged in wooden cases supported by soft materials to prevent any movement during transportation and storage.
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