AISI 316L stainless steel candle filters and porous tubes: Material characteristics

Porous AISI 316L stainless steel filters

AmesPore® candle filters and porous tubes are long, cylindrical filters with thin walls, i.e. they have a high length/diameter ratio.
The material used for these filters is AISI 316L stainless steel. They are made by isostatic compaction of powder in a flexible mould with the negative shape of the part, and then sintered.The pore size is adjusted by changing the compaction pressure and/or the particle size of the powder.

Material Chemical composition
Other characteristics
Sintered austenitic AISI 316L
stainless steel
Cr: 16-18%
Ni: 11-14%
Mo: 2-3%
C: < 0,03%
Others: 2% max.
Fe: Rest
Suitable for strongly oxidizing environments.
Suitable for contact with food or sanitary water

Maximum working temperature:
600°C in an oxidizing atmosphere, 850°C in a reducing atmosphere.

Coefficient of linear expansion: ≈ 12·10-6 K-1

Grade1 Total
porosity(%)
Pore size(µm) Filtering efficiency3
x (T=98%) (µm)
Permeability
α (10-12m2)
Ring tensile strength
(MPa)
Average Maximum2
SSI2 25 2,5 7 1 0,09 112
SSI5 39 4,5 10,5 3 0,28 85
SSI10 41 9 19 5 0,60 65
SSI15 40 16 37 9 0,90 63
SSI25 46 25 43 14 1,00 47
SSI40 53 39 70 21 1,04 25
SSI50 54 50 83 29 1,17 12
SSI100 54 100 261 59 1,31 5
  1. Intermediate grades can be manufactured on demand.
  2. Equivalent to the bubble point, determined at a continuous flow rate of 5 ml/min.
  3. Single-pass measurement in water at 1 bar and 1 m/s.

Air pressure loss

Water pressure loss

Would you need any information about stainless steel 316L filters ?

AMES can create specific solutions of shapes, materials and performance in which the porosity of the sintered product is tailored to the applications.
Please, contact us and we will answer you as soon as possible.
Thank you!