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In every order
- Full lot COA — PSD, sphericity, flow rate, chemistry
- Qualified parameter sets for the major LPBF systems
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Materials, Composite Tooling, Engineering, Iron Base, Jigs&Fixtures, LPBF (DMLS) 3D Printing Materials, Manufacturing, Metal Powders 3D Printing Materials · Metal LPBF
M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs
Extreme Strength. High Hardness. M300 maraging steel powder for LPBF, EBM, and DED additive manufacturing. Delivers exceptional strength, high hardness, and wear resistance for tooling and industrial applications.
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
M300 maraging steel powder is an age-hardenable martensitic tool steel specifically engineered for additive manufacturing using LPBF, EBM, and DED processes. Known as 1.2709 tool steel, this alloy delivers exceptional tensile strength and hardness after a simple age-hardening heat treatment.
Unlike high-carbon tool steels such as H13 or M2, which are difficult to process in Laser Powder Bed Fusion due to cracking and instability, M300 maraging steel powder provides comparable mechanical performance with significantly improved additive manufacturing processability.
Strict control of residual alloying elements ensures optimized layer fusion, predictable mechanical properties, and reliable repeatability. After age hardening, M300 maraging steel powder achieves outstanding strength, wear resistance, and heat resistance up to 900°F (482°C).
This combination of strength, hardness, and additive manufacturing compatibility makes M300 maraging steel powder an ideal solution for tooling inserts, molds, and high-load functional components.
| Base Element | Strengthening Elements | Minor / Control Elements | Residual Elements |
|---|---|---|---|
| Iron: Balance | Nickel: 17.0–19.0% | Chromium: 0.25% | Nitrogen: 0.10% |
| Cobalt: 8.50–10.0% | Manganese: 0.15% | Oxygen: 0.10% | |
| Molybdenum: 4.50–5.20% | Silicon: 0.10% | Phosphorous: 0.010% | |
| Titanium: 0.80–1.20% | Carbon: 0.030% | Sulfur: 0.010% |
machine type:
F – LPBF
industries
Automotive / Tool industry
Key Performance Benefits
-
Exceptional tensile strength after age hardening
-
High hardness and wear resistance
-
Heat resistance up to 900°F (482°C)
-
Excellent LPBF process stability
-
Lower crack susceptibility compared to high-carbon tool steels
typical applications
-
Tool inserts for molding and casting
-
Tire sipes and molds
-
Hard-wearing functional components
| Brand | Carpenter Additive |
| Technology | Metal LPBF |
| Powder Package | 10 kg bottle, 440 kg hopper, 840 kg hopper |
| PSD (particle size distribution) | 15–45 micrometres |
| Printing Materials | Metal Powders |
| Material | 316L, M300 |
| Country of origin | USA |
| Production Method | Gas Atomization (GA) |
Full documentation — TDS, SDS, batch COA, and parameter sets for the major LPBF platforms. Everything you need for qualification under AS9100 / ISO 13485 workflows.
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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M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs
Extreme Strength. High Hardness. M300 maraging steel powder for LPBF, EBM, and DED additive manufacturing. Delivers exceptional strength, high hardness, and wear resistance for tooling and industrial applications.
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The M400 Steel Build Platform is a heavy-duty SS304 stainless steel build plate engineered for EOS M400 systems. Designed for large-format LPBF production, it delivers superior thermal stability, structural rigidity, and repeatable industrial metal 3D printing performance.
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EOS M290 SS304 Build Plate | 50mm Stainless LPBF Platform
SS304 stainless steel build plate for EOS M280/M290 systems. 50mm optimized profile for faster thermal cycling and stable LPBF metal printing.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates for most metal AM systems.
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Corrosion Resistance. Toughness. Everyday Reliability.
Austenitic 316L stainless steel powder for LPBF, EBM, and DED metal 3D printing. Offers excellent weldability, good corrosion resistance, and reliable mechanical performance for industrial and medical applications.
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From process engineers running M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs
Unedited feedback from customers who reorder M300 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 M300 maraging steel powder?
M300 maraging steel powder is an age-hardenable martensitic tool steel used in additive manufacturing to produce high-strength, high-hardness tooling components.
Which additive manufacturing processes are compatible?
M300 maraging steel powder is compatible with LPBF, EBM, and DED systems.
Does M300 require heat treatment?
Yes. Age hardening is required to achieve maximum strength and hardness.
How does M300 compare to H13?
M300 offers comparable mechanical properties but significantly better printability in laser powder bed fusion processes.
What industries use M300 maraging steel powder?
It is widely used in transportation and industrial sectors for tooling, molds, and wear-resistant parts.
What industries commonly use 316L stainless steel powder?
Typical markets include aerospace, transportation, and medical industries, as well as general industrial manufacturing.
Place your order, or talk to an engineer first
Order 316L direct, or send your application and we'll recommend the right alloy and PSD for your printer.