Filtration
Stainless steel powders
Höganäs' filtration media
The production method for this special material is based on high-pressure water atomisation. A liquid metal stream is shattered by water jets into small particles. These grains have an extremely irregular shape.
The porosity volume and particle surface area are dictated by the size and shape of the powder particles. Larger grains tend to give a higher porosity, but a lower active surface area. Finer particles give a higher active surface area, but a somewhat lower porosity volume. The high active surface area ensures good cleaning during filtration.
The filtration particles are made of stainless steel alloys specially developed for hot polymer filtration. The chemical composition is important for the particles’ strength and corrosion resistance.
The alloys used should be strong enough to minimize collapse during filtration and offer stable pressure during the filtration cycle. As the particles are not brittle, they do not crack up during filtration. Consequently there is no risk of the nozzles clogging.
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Nickel based
P-271
| Fe (%) | Ni (%) | Cr (%) | Mn (%) | Si (%) | Mo (%) | C (%) |
| 7.0-10.0 | Bla | 14.0-17.0 | - | 2.0-2.5 | - | Max 0.03 |
Applications
High oxidation resistance, ideal for spinning of nylon yarn
Oxidation resistance
5+
Stainless steel based
DP-1
| Fe (%) | Ni (%) | Cr (%) | Mn (%) | Si (%) | Mo (%) | C (%) |
| Bla | Max 0.9 | 33.0-37.0 | Max 0.5 | 2.0-4.0 | Max 0.3 | Max 0.04 |
Applications
High pressure filtration, magnetic
Oxidation resistance
4+
P-270
| Fe (%) | Ni (%) | Cr (%) | Mn (%) | Si (%) | Mo (%) | C (%) |
| Bla | 11.0-13.0 | 18.0-22.0 | 0.4-.07 | 2.5-3.5 | 1.0-3.0 | Max 0.02 |
Applications
Standard media for polyester yarn
Oxidation resistance
3+
316L
| Fe (%) | Ni (%) | Cr (%) | Mn (%) | Si (%) | Mo (%) | C (%) |
| Bla | 12.0-14.0 | 16.0-18.0 | Max 0.2 | 0.5-1.0 | 2.0-3.0 | Max 0.03 |
Applications
Ordinary Stainless steel
Oxidation resistance
2+
Typical physical properties
| Size micron | Size mesh | Apparent density g/cm3 |
Tap density g/cm3 |
Porosity % |
| 45-90 | 170/325 | 2.6 | 3.5 | 55 |
| 90-125 | 120/170 | 2.4 | 3.1 | 58 |
| 125-180 | 120/80 | 2.2 | 3.0 | 61 |
| 180-250 | 60/80 | 2.0 | 2.8 | 54 |
| 250-355 | 45/60 | 1.8 | 2.6 | 55 |
| 355-500 | 35/45 | 1.7 | 2.2 | 71 |
| 500-850 | 20/35 | 1.7 | 2.1 | 73 |
| 850-2000 | 10/20 | 1.5 | 1.9 | 75 |
| Alternative cuts | ||||
| 150-300 | 50/100 | 1.9 | 2.1 | 73 |
| 180-425 | 40/80 | 1.8 | 2.0 | 74 |
| 250-600 | 30/60 | 1.7 | 1.9 | 74 |
| 300-710 | 25/35 | 1.7 | 1.85 | 75 |
| 710-2000 | 10/25 | 1.5 | 1.8 | 76 |
Metal powders contribute to sustainable development
Metal powder technology provides endless opportunities; not only does it enable our customers to reduce their material and energy consumption, but it also helps them use new and better techniques that make final products more efficient and less expensive.
We believe that the inherent power of metal powders can be utilised to a much larger extent than it is today. We are also convinced that metal powders can contribute to sustainable development. With metal powder solutions, we can contribute to solving many of society’s pressing challenges, such as resource scarcity and the need for renewable energy.
