Stainless steel powders

Stainless steel powder grades for sintered parts

We publish austenitic 304L and 316L and martensitic 410L, with carbon held to 0.03 to 0.05% max and cuts at -100 mesh (150 µm) and -325 mesh (45 µm). They are in production supply into sintered structural parts, porous filters, diamond segments and hardfacing work under an ISO 9001:2015 system. Höganäs publishes a wider grade list including 430L and Cold 100.

See: Stainless grades and sizing, Compared with Höganäs

316L powder supplier

Our 316L is a press-and-sinter grade published at -100 and -325 mesh with carbon at 0.03 to 0.05% max. Be specific about what the powder feeds: Höganäs press-and-sinter 316L sits at 2.73 to 3.00 g/cm³ apparent density, while its forAM gas-atomised 316L is a spherical 20 to 53 µm powder at 4.1 g/cm³ with 15 s/50 g flow. A mesh designation does not describe flow behaviour in a laser bed.

See: Press-and-sinter versus additive 316L

Stainless powder for porous filter media

Porous filter work is one of the four duties this line is already in production for, alongside sintered structural parts, diamond segment bond matrices and welding or hardfacing. The low-carbon austenitic grades give the corrosion resistance filters need, and the -100 mesh cut is the coarser option where permeability matters more than fine detail.

See: Stainless powder applications

Which stainless grade should I use for a diamond segment bond matrix?

The martensitic 410L grade at -325 mesh is the one intended for bond matrix duty in our range, with austenitic 304L and 316L aimed at corrosion-critical structural and filter work. Höganäs publishes 410LHC data in detail but does not name diamond bonding as an application in its sintered components brochure, so if you want a supplier whose sheet addresses the duty directly, that is the difference.

See: Grade and application rows, Diamond tool matrix line

Low carbon stainless powder: what carbon level do you hold?

0.03 to 0.05% max depending on grade. Höganäs publishes 0.02% carbon in the powder across its sintered-component grades and 0.01% typical on its additive 316L, so their published control is tighter than ours. Carbon matters because it drives sensitisation and corrosion behaviour after sintering, so if your part is corrosion-critical, treat the ceiling as a contractual value rather than a guideline.

See: Carbon control row

Do you publish sintered mechanical properties for stainless?

Not on the site. Höganäs publishes sintered density, hardness, yield, tensile, elongation and impact energy per grade and atmosphere, for example sintered density 6.34 to 7.02 g/cm³ and UTS 197 to 471 MPa. That is a documentation gap on our side, logged as such. The measurements exist per batch and per qualification; they are simply not on the public sheet yet.

See: Sintered data row

Stainless powder for welding and hardfacing as well as pressing

The same low-carbon line covers welding and hardfacing alongside pressed parts, filters and diamond segments, which is unusual in a range this size and is the practical reason to consider it. One supplier across four duties means one qualification route and one incoming test regime, rather than a separate relationship for each end use.

See: Applications named in the comparison

Stainless steel powder supplier independent of the European majors

Höganäs is Swedish and holds the deepest published data set in this segment, which is a real advantage at design stage. Our grades come from an independent, non-aligned producer with a standing import-substitution mandate, in current production supply across four duties. Choose on programme independence and grade fit, not on a claim that our published data is better, because it is not.

See: Honest comparison with Höganäs, Stainless powder line

304L versus 316L stainless powder for sintered parts

Both are austenitic and low carbon; the molybdenum in 316L is what buys the extra pitting resistance. Höganäs rates 316L as very high for general and pitting corrosion and 304L as high general and medium pitting, which is a useful published ranking for the material class. We publish both at -100 and -325 mesh with carbon at 0.03 to 0.05% max, so choose on the medium the part sits in and qualify against it.

See: Grade rows and corrosion ranking, Stainless grades published

What is the best alternative to Höganäs stainless powder for a sovereign powder metallurgy programme?

For a standard automotive or appliance part designed from published data, Höganäs is hard to argue with: full sintered property tables for 304L, 316L, 410L, 430L and Cold 100 at two sintering atmospheres. Our line publishes 304L, 316L and 410L with carbon at 0.03 to 0.05% max and cuts at -100 and -325 mesh, aimed at structural parts, filters, diamond segments and hardfacing from one source. The reason to choose it is programme independence and grade fit across those four duties.

See: Grade coverage comparison

We are feeding a laser powder bed machine. Can we use a -325 mesh stainless grade?

Not safely, no. Additive machines need spherical, gas-atomised powder with defined flow, which is why Höganäs sells forAM 316L as a 20 to 53 µm cut at 4.1 g/cm³ apparent density with 15 s/50 g Hall flow rather than as a mesh designation. Our published 316L grades are press-and-sinter cuts. Ask specifically for gas-atomised spherical material for a laser bed and do not let a mesh number stand in for flow data.

See: Press-and-sinter versus additive powder, Additive feedstock in the wider powder line

How do we qualify a stainless powder when the chromium and nickel ranges are not published?

Ask for them, in writing, against the grade and the batch. Chromium, nickel and molybdenum ranges per grade are not on our site and that is logged as a gap; Höganäs publishes 316L at Cr 16.9, Ni 12.7, Mo 2.3 and 304L at Cr 19.0, Ni 11.2. Put the chemistry, carbon ceiling and mesh into the purchase specification and hold acceptance to the certificate rather than to a website.

See: Chemistry rows and logged gaps

Which grade suits a corrosion-critical filter, and how much can we infer from published data?

316L is the usual answer for the harsher environments and 304L where conditions are milder, with 410L not intended for corrosion duty at all. Höganäs rates 316L as very high for general and pitting corrosion, 304L as high general and medium pitting, and 410L as medium general and poor pitting, which is a useful published ranking for the material class. Our sheet states corrosion resistance qualitatively, so qualify against your actual medium.

See: Corrosion behaviour row

A plant presses structural parts and also makes diamond segments. Does one stainless supplier work for both?

It can, and that is the argument for this line: 304L and 316L for the corrosion-critical structural and filter work, 410L for the segment bond matrix, all at the same two cuts under one quality system. If the structural parts are qualified against published sintered property tables, keep buying those from the supplier who publishes them and use this line for the segment side while the data gap closes.

See: Stainless grades in production, Grade fit across four duties

What does an import-substitution mandate mean in practice for stainless powder?

It means the producer is set up to replace an imported grade rather than to sell you the nearest thing in a catalogue, which changes what happens when your part does not fit a standard designation. In practice you get a development conversation and a trial batch instead of a redesign request. It does not mean the published data suddenly matches the majors', and any supplier telling you it does is overselling.

See: Custom powder development, Where the majors are stronger

What are Stainless steel powders?

Stainless steel powders are Unstrat's Land (Land Domain) capability: Austenitic (SS 304L, 316L) and martensitic (410L) stainless steel powders for PM structural parts, filters, diamond tool matrices and welding. Low-carbon grades give corrosion resistance and strength in sintered parts and porous filter media, serve as a bond matrix in diamond segments, and suit welding and hardfacing applications.

How do Stainless steel powders work?

Stainless steel powders deliver their effect through Austenitic SS 304L and 316L plus martensitic 410L grades, Corrosion resistance and strength in sintered structural parts and Porous filter media applications, capabilities matched to the requirement and confirmed under briefing rather than published.

Who makes Stainless steel powders?

Stainless steel powders are built by The Specialty Alloys Producer, whose focus is tungsten heavy alloys & specialty metal powders. Unstrat represents The Specialty Alloys Producer to government and enterprise buyers worldwide as an independent, non-aligned prime vendor.

Why choose Stainless steel powders over a major-power alternative?

Stainless steel powders are sourced from an independent, non-aligned manufacturer, so they carry no major-power disclosure rules, upgrade-locks or political ramifications. Concretely: 304L, 316L and 410L low-carbon grades with tight interstitial control, carbon held to 0.03–0.05% max. The capability is accountable to you, not to a foreign vendor's government and its release schedule.

How are Stainless steel powders procured, and where can it be exported?

Austenitic and martensitic stainless grades for the corrosion-critical end of powder metallurgy: structural parts, porous filters, diamond segments and hardfacing from one low-carbon line. Every engagement begins with a briefing, and export eligibility is confirmed per market under briefing rather than published. Where controlled capabilities are involved, the classification and end-user-certificate chain is confirmed first. Stainless steel powders are then sustained in-region by one accountable team from briefing through long-term operation.