Water-atomized stainless steel powder

Water-atomized SS powder, engineered for sintered metal filters.

RS&M manufactures 316L and 304L stainless steel powder in the 150 to 250 mesh range — purpose-built for sintered porous filter cartridges, PTFE membrane-laminated filters, and powder-metallurgy applications. Tight PSD control, batch-level CoA, factory-direct.

Mesh range
150–250mesh
Stainless grades
316L · 304L
Sample lead time
5–7 days
316L · Water atomized~58–100 µm (150–250 mesh)
schematic
ISO 9001 quality system
Tested per ASTM B214, B527, B855
REACH & RoHS compliance documentation
Batch-level Certificate of Analysis

Built for these applications

Where our powder ends up after sintering

Sintered porous metal filter cartridges

Multi-layer filter cartridges for compressed gas, hydraulic fluid, polymer melt, and high-temperature process gases. Our 150–250 mesh range covers the coarse support layer through the fine filtration layer.

PTFE membrane-laminated filter cartridges

Stable, sub-spherical morphology gives the laminated PTFE membrane a uniform porous substrate, improving back-pulse durability and dust release in pulse-jet baghouses and food-grade filtration.

Powder metallurgy & MIM feedstock

Customer-specified PSD, oxygen content, and tap density for sintered structural parts and metal injection molding. We work to your spec.

Adjacent industrial uses

Cold spray, thermal spray, surface engineering, friction materials. Send us your spec — small-batch trials welcome.

Powder grades

Stocked SKUs for filter cartridge OEMs, plus custom blends for PM and MIM

316L Stainless Steel Powder

316L Stainless Steel Powder · 150 mesh (≈100 µm)

Water-atomized 316L stainless steel powder, sieved at 150 mesh (≈100 µm cut point). Specified for sintered filter cartridge support layers, medium-precision single-layer filters, and press-and-sinter PM components. Batch-level CoA.

150 mesh (≈100 µm cut point; typical D50 ≈ 75–90 µm)

Learn more

316L Stainless Steel Powder

316L Stainless Steel Powder · 200 mesh (≈75 µm)

Water-atomized 316L stainless steel powder, sieved at 200 mesh (≈75 µm cut point). The transition size between coarse support and fine filtration layers in multi-layer sintered cartridges; also a core grade for medium-precision single-layer cartridges.

200 mesh (≈75 µm cut point; typical D50 ≈ 55–65 µm)

Learn more

316L Stainless Steel Powder

316L Stainless Steel Powder · 250 mesh (≈58 µm)

Water-atomized 316L stainless steel powder, sieved at 250 mesh (≈58 µm cut point). The fine filtration layer of precision sintered cartridges and the low-roughness substrate for PTFE membrane lamination.

250 mesh (≈58 µm cut point; typical D50 ≈ 40–48 µm)

Learn more

304L Stainless Steel Powder

304L Stainless Steel Powder · 150 / 200 / 250 mesh

Water-atomized 304L stainless steel powder, available at 150 mesh, 200 mesh, and 250 mesh cut points. The cost-optimized choice for general-purpose sintered metal filter cartridges and PM applications where 316L's molybdenum is not required.

150 / 200 / 250 mesh — standard SKUs

Learn more

Custom blends & PM / MIM

Custom Blends & PM / MIM Feedstock

Custom water-atomized stainless steel powder for PM, MIM, and binder-jet applications. Custom mesh splits, lower oxygen targets, alternative chemistries (17-4 PH, 430), and full feedstock partnerships. 25 kg minimum trial order.

Per customer specification

Learn more

Water atomization, controlled, traceable

How the powder is made

  1. 01

    Induction melting

    Stainless steel feedstock and ferroalloys are blended to the target grade and melted under controlled atmosphere. Spectrometer chemistry verification before tap.

  2. 02

    High-pressure water atomization

    Molten metal stream broken up by high-pressure water jets, producing the irregular, cauliflower morphology preferred for sintered filters.

  3. 03

    Drying & deoxidation

    Vacuum drying followed by reducing-atmosphere treatment to control surface oxygen — typically below 3000 ppm for filter-grade product.

  4. 04

    Multi-stage sieving

    Mechanical sieving to deliver 150 mesh, 200 mesh, 250 mesh, or custom split. Magnetic separation removes any tramp ferromagnetic contamination.

  5. 05

    QC & packaging

    PSD on laser diffractometer, chemistry on OES, tap density per ASTM B527, oxygen on LECO. CoA issued per lot. Vacuum-sealed for export.

Why filter manufacturers buy from RS&M

Specialized in filter-grade powder

We don't make every alloy under the sun. We make stainless steel powder for sintered filter cartridges, and we tune it for sintered density, neck formation, and post-sinter permeability.

Tight PSD, batch consistency

Each lot is sieved to the customer-agreed mesh band and delivered with a CoA covering chemistry, PSD (D10/D50/D90), apparent and tap density, and oxygen content.

Export-ready packaging

Vacuum-sealed inner pouches, sealed steel drums, palletized for sea freight. EXW / FOB / CIF / DDP — we handle export documentation, MSDS, and origin certificates.

Direct technical contact

Talk to the engineer who atomized your powder. Sintering parameter advice, PSD adjustments, and small-batch trials are part of how we work.

Water-atomized SS powder, engineered for sintered metal filters.

RS&M manufactures 316L and 304L stainless steel powder in the 150 to 250 mesh range — purpose-built for sintered porous filter cartridges, PTFE membrane-laminated filters, and powder-metallurgy applications. Tight PSD control, batch-level CoA, factory-direct.

Request a Quote