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Materials, Iron Base, LPBF (DMLS) 3D Printing Materials, Metal Powders 3D Printing Materials · Metal LPBF
A-Powder 18Ni300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs
Ultra-high-strength. Age-hardenable. Tooling-grade. Genuine AO Metal 18Ni300 maraging tool steel for LPBF metal 3D printing.
- ✓ Gas-atomized, low-oxygen — full COA per lot
- ✓ US-produced — workable volumes, no mill minimums
- ✓ Fast dispatch from Los Angeles
NDA standard
Ships in 1–2 business days
What your materials team actually checks
Ultra-high strength, simple aging
18Ni300 reaches UTS up to ~2000 MPa after a single low-temperature age (~490 °C) with minimal distortion — the tooling and high-strength workhorse. Machinable before aging. Full COA per lot.
A materials engineer on the line
Qualification question? We've run these alloys in production on AO Metal — parameter sets available. Sub-4h reply, NDA standard. Use the Talk to materials engineer button above.
About this product
A-Powder 18Ni300 is a gas-atomized maraging (18Ni-300) tool steel for laser powder bed fusion (LPBF): ultra-high strength after a single low-temperature age, excellent dimensional stability and machinability before aging — the workhorse for conformal-cooling tooling and high-strength parts. US-produced, lot-certified for production.
Why engineers choose A-Powder 18Ni300
Four things a materials team verifies before qualifying a powder.
Ultra-high strength
UTS up to ~2000 MPa after a single low-temperature age (~490 °C) — one of the strongest AM alloys.
Simple, stable aging
Machinable in the as-built state, then aged with minimal distortion — dimensional stability tooling teams rely on.
Lot-certified consistency
Full COA per lot — PSD, chemistry, apparent density and flow, traceable lot number for AS9100 and NADCAP workflows.
US-produced, fast dispatch
Made in the USA and shipped from Los Angeles in 5–10 business days. Need a tighter cut or an official purchase request? Just ask.
How we supply it
Every lot ships as a verified process, not a bag of powder — melted, atomized, tested, certified.
Step 01
Melted & atomized
US VIGA (vacuum induction melt + gas atomization) for spherical, low-oxygen maraging powder.
Step 02
Tested & certified
Every lot checked for PSD, chemistry, apparent density and flow — full COA with a traceable lot number.
Step 03
Dispatched from LA
Bottled or hoppered and shipped from Los Angeles in 5–10 business days.
Powder characteristics
| Property | Value |
|---|---|
| Alloy / grade | 18Ni-300 maraging steel (1.2709 · UNS K93120) |
| Particle size (PSD) | 15–53 µm — LPBF cut (custom cuts available) |
| Production method | VIGA (vacuum induction melt + gas atomized), US-produced |
| Morphology | Spherical, high sphericity, low oxygen |
| Condition | Age-hardenable (~490 °C, ~6 h) |
| Package | 10 kg bottle · 440 kg hopper · 840 kg hopper |
Chemical composition
| Element | Content | Element | Content |
|---|---|---|---|
| Iron (Fe) | Balance | Titanium (Ti) | 0.60–0.80% |
| Nickel (Ni) | 17.0–19.0% | Aluminium (Al) | 0.05–0.15% |
| Cobalt (Co) | 8.5–9.5% | Carbon (C) | ≤ 0.03% |
| Molybdenum (Mo) | 4.5–5.2% | Si / Mn | ≤ 0.10% |
Heat treatment & processing
- Age-hardening — a single low-temperature age (~490 °C, ~6 h) develops UTS up to ~2000 MPa; no quench required.
- Machinable and EDM-friendly in the as-built state; age after finishing for minimal distortion.
- Low corrosion resistance — apply a surface treatment for corrosive or wet environments.
Typical applications
Where teams run high-strength 18Ni300 printed parts.
Conformal-cooling tooling
Injection mold inserts, dies
Aerospace structural
High-strength brackets, fittings
Motorsport
Lightweight high-load parts
Dies & high-strength parts
Punches, gears, shafts
Material comparison: 18Ni300 vs 17-4PH vs H13
| Feature | 18Ni300 | 17-4PH | H13 |
|---|---|---|---|
| Type | Maraging (Fe-Ni-Co-Mo) | Martensitic PH stainless | Hot-work tool steel |
| Strength (aged) | Very high (~2000 MPa) | High | High |
| Hardness | ~54 HRC | ~44 HRC | ~50 HRC |
| Corrosion resistance | Low | Good | Low |
| Typical use | Tooling, high-strength parts | Corrosion + strength | Hot-work dies |
Not sure 18Ni300 is the right alloy for your part? Send your application, strength target and tooling requirements — a materials engineer who has run these alloys in production on AO Metal will help you qualify it. Sub-4h reply, NDA standard.
Why source through Additive Plus
- Own A-Powder line, US-produced — the same industrial AM-powder quality at an accessible, published price.
- Lot-certified — full COA per lot with PSD, chemistry, apparent density and flow.
- Tooling & aging guidance — conformal-cooling design and ~490 °C aging for peak strength.
- US-based support — fast dispatch from Los Angeles; sub-24h engineer response.
| Brand | AO Metal – High-Precision Metal 3D Printers for Innovation |
| Technology | Metal LPBF |
| Powder Package | 10 kg bottle, 440 kg hopper, 840 kg hopper |
| PSD (particle size distribution) | 15–53 micrometres |
| Printing Materials | Metal Powders |
| Material | 18Ni300 |
| Country of origin | USA |
| Production Method | Vacuum Induction Melting Gas Atomization (VIGA) |
Don't see your spec?
We atomize our own. Custom variants on request.
Tighter PSD, modified chemistry, custom blend? Our ATO atomization lab runs custom batches in 3–4 weeks. Biocompatible, refractory, proprietary — all in-house, verified before ship.
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From process engineers running A-Powder 18Ni300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs
Unedited feedback from customers who reorder A-Powder 18Ni300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs.
★★★★★
Same lot 4 times in a row. We stopped re-running parameter sweeps after the second order — density was identical to the first build.
MK
Marcus K.
Process Engineer · Aerospace OEM
★★★★★
Asked about ferrite content on a Friday. A materials engineer answered Monday morning with actual data, not a sales pitch. That's why we keep ordering.
PS
Priya S.
R&D Lead · Medical Devices
★★★★★
COA matches the bottle. PSD and flow are exactly what was on the sheet — we run it on a Renishaw 500Q and it hits density on the first try.
DR
Diego R.
Production Lead · Energy
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What is 18Ni300 Maraging Steel Powder?
18Ni300 is a high-strength maraging steel powder engineered for LPBF additive manufacturing. It combines ultra-high strength, excellent ductility, and predictable mechanical performance after heat treatment.
Can this powder be heat-treated?
Can this powder be heat-treated?
What industries typically use 18Ni300?
Aerospace, defense, and industrial engineering applications requiring high-strength, load-bearing components.
Why choose A-Powder 18Ni300?
Manufactured by AO Metal with small-batch flexibility, fast delivery, consistent quality, and full traceable documentation, ensuring production-ready LPBF performance.
Is A-Powder the same quality as name-brand metal powders?
Yes. A-Powder is our own brand of industrial AM powder - gas-atomized for high sphericity and low oxygen, with a full Certificate of Analysis (chemistry, particle-size distribution, apparent density and flow rate) on every lot. You get the performance you expect from a premium feedstock, at a more accessible, published price.
Can I order a smaller quantity or a custom particle size?
Yes. We sell in small, workable volumes with no large mill minimums, and we can supply custom particle-size cuts or quantities on request - just ask us for a quote.
Place your order, or talk to an engineer first
Order A-Powder 18Ni300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs direct, or talk to materials engineer