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In every order
- Full lot COA — PSD, sphericity, flow rate, chemistry
- Qualified parameter sets for the major LPBF systems
- Mutual NDA before any file or spec review
- Free U.S. shipping over $200 · fast dispatch from L.A.
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
Additive Plus A-Powder — industrial 18Ni300 maraging steel for LPBF at an accessible price.
- ✓ Gas-atomized, low-oxygen — full COA on every lot
- ✓ Small, workable volumes — no mill minimums
- ✓ Fast dispatch from Los Angeles
NDA standard
Ships in 1–2 business days
Spec-match guarantee on every lot
Built for production teams
What your process engineer actually checks
Locked, traceable lot chemistry
Every lot ships with a COA documenting PSD, sphericity, flow rate, apparent density, and full chemistry — and a lot number you can trace. Aerospace and medical teams reorder 4+ times without re-qualifying.
Qualified parameters, not just powder
Validated parameter sets for EOS M 290, Renishaw 500Q, SLM 280, and our own AO Metal LPBF ship with the order. Load the profile and hit density on the first build — no parameter-development burn.
A materials engineer on the line
Questions on ferrite content, flowability, recyclate ratios, or HIP response? A materials engineer answers directly — not a contact-form bot. Most replies in under 4 hours, NDA standard.
About this product
A-Powder 18Ni300 (Maraging M300) is Additive Plus’s own-brand maraging tool steel for laser powder bed fusion (LPBF): very high strength and hardness after a simple aging step, with excellent machinability before treatment — the same industrial quality at an accessible price.
Why teams buy A-Powder from Additive Plus
- Additive Plus’s own A-Powder line — the same industrial AM-powder quality at an accessible, published price.
- Gas-atomized for high sphericity, low oxygen and consistent flow.
- Available in small, workable volumes — no large mill minimums.
- Full COA with every lot — PSD, chemistry, apparent density and flow rate, with a traceable lot number.
- Fast dispatch from Los Angeles. Need a tighter cut or a custom quantity? Just ask.
Standards & equivalents
- Made to the maraging steel specification: 18Ni-300 · 1.2709 · X3NiCoMoTi-18-9-5 · ASTM A646
- Machine type: F — LPBF · Particle size: 15–45 µm (custom cuts available) · Bottle: 10 kg / 22 lbs
- Quality: gas-atomized for high sphericity and low oxygen; full COA per lot.
Chemical composition
Typical chemistry (wt%) for 18Ni-300 maraging steel:
| Element | Content | Element | Content |
|---|---|---|---|
| Iron (Fe) | Balance | Chromium (Cr) | ≤ 0.25% |
| Nickel (Ni) | 17.0–19.0% | Manganese (Mn) | ≤ 0.15% |
| Cobalt (Co) | 8.50–10.0% | Silicon (Si) | ≤ 0.10% |
| Molybdenum (Mo) | 4.50–5.20% | Carbon (C) | ≤ 0.030% |
| Titanium (Ti) | 0.80–1.20% | P / S | ≤ 0.010% each |
Heat treatment & processing
- Age-hardenable — a simple, single low-temperature aging step develops high strength and hardness (no complex quench).
- Excellent AM processability with low distortion, unlike high-carbon tool steels.
- Readily machined in the solution-annealed condition, then aged to final hardness.
Key performance benefits
- Exceptional tensile strength and hardness
- High hardness and wear resistance
- Low-distortion processability in LPBF
- Simple, predictable heat treatment
Typical applications
- Tool inserts for molding and casting
- Conformal-cooling tooling
- High-strength functional components
- Jigs and fixtures
Material comparison: 18Ni300 vs H13 vs 17-4PH
| Feature | 18Ni300 (maraging) | H13 (hot-work) | 17-4PH |
|---|---|---|---|
| Type | Maraging tool steel | Hot-work tool steel | PH stainless |
| Hardness | Very high (aged) | High | High |
| AM processability | Excellent (low distortion) | Challenging (crack-prone) | Excellent |
| Heat treatment | Simple aging | Air-harden + temper | Single-step aging |
| Corrosion resistance | Low | Low | Good |
| Typical use | Molds, inserts, tooling | Die casting, extrusion | Structural parts, tooling |
| 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 | China |
| 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.
Frequently bought together
Complete the workflow
What teams add to an order so the first build runs clean — handling, plates, and a sample to qualify before you commit volume.
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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