In stock
- COA on request — PSD, sphericity, flow rate, chemistry
- Mutual NDA before any file or spec review
M300 Maraging Steel Powder (1.2709) for LPBF — 15–45 µm, 10 kg
Carpenter Maraging Steel M300 powder price: $1,210 per 10 kg ($121.00/kg)
Age-hardenable maraging tool steel that reaches over 2,100 MPa tensile strength and 54 HRC after solution and age in Carpenter data. H13 and M2 are hard to print by LPBF; M300 gives comparable properties with proven processability. Made by Carpenter Additive (PowderRange M300).
* Carpenter data with 20–60 µm layers and specific energy ≥ 65 J/mm³.
Which tool steel is right for your build?
All of them are in our catalog at a published price. Pick by machine, timing and country of origin.
| Powder | Particle size | Origin | Availability | Good fit for | 10 kg | |
|---|---|---|---|---|---|---|
 Carpenter Additive M300 FThis page | 15–45 µm · LPBF | Confirmed per lot | In stock | Mold and die inserts; proven LPBF processability | $1,210 | Add to cart |
 Carpenter Additive M300 ECoarse cut | 45–106 µm · DED, EBM | Confirmed per lot | In stock | Directed energy deposition and electron-beam systems | $315 | View |
 CNPC Powder 18Ni300Named manufacturer | 15–53 µm · LPBF | China | Made to order | Lower price per kg | $590 | View |
 Carpenter Additive H13Hot-work tool steel | 15–45 µm · LPBF | Confirmed per lot | In stock | Programs that specify H13; harder to print than maraging steel | $620 | View |
Need a specific country of origin for a government or defense program? Ask before ordering and we will confirm it in writing for your lot.
What is in the container
Specification from the manufacturer. The certificate for your lot is available on request.
Specification
Type analysis, PowderRange M300 datasheet (Carpenter Additive). Single figures are nominal except where noted.
| Element | wt% |
|---|---|
| Iron (Fe) | Balance |
| Nickel (Ni) | 17.0–19.0 |
| Cobalt (Co) | 8.50–10.0 |
| Molybdenum (Mo) | 4.50–5.20 |
| Titanium (Ti) | 0.80–1.20 |
| Chromium (Cr) | 0.25 |
| Manganese (Mn) | 0.15 |
| Oxygen (O) | 0.10 |
| Silicon (Si) | 0.10 |
| Carbon (C) | 0.030 |
| Phosphorus (P) | 0.010 |
| Sulfur (S) | 0.010 |
| Powder property | Requirement |
|---|---|
| Above 53 µm | max 1 wt% (ASTM B214) |
| Below 15 µm | max 10 vol% (ASTM B822) |
| D10 / D50 / D90 | measured and reported on the lot certificate |
| Hall flow, apparent density | measured and reported (ASTM B213, B212) |
| Melting and atomization | Nitrogen gas atomized |
What the particles look like
From the manufacturer datasheet
SEM image of typical PowderRange M300 powder, from the Carpenter Additive datasheet; scale bar 100 µm.
Each order ships with the Carpenter Additive certificate of analysis for its lot: chemistry, particle size distribution (D10/D50/D90) and density. Ask us if you need to see a recent certificate before ordering.
How the printed metal performs
Room-temperature tensile data published by Carpenter Additive for PowderRange M300: average of at least 5 samples per orientation and condition. A guide for your own qualification, not design data.
| Condition | Orientation | Yield, MPa | UTS, MPa | Elongation | Impact, J | HRC |
|---|---|---|---|---|---|---|
| As-built | X–Y | 1020 | 1262 | 16% | 41 | 29 |
| Z | 1055 | 1262 | 15% | 39 | 29 | |
| Stress relief + solution + age | X–Y | 2117 | 2186 | 6% | 9 | 54 |
| Z | 2117 | 2186 | 6% | 9 | 54 | |
| HIP + solution + age | X–Y | 2041 | 2130 | 6% | 9 | 52 |
| Z | 2027 | 2130 | 4% | 7 | 52 | |
| Forged bar reference | X–Y | 2000 | 2027 | 11% | — | 52 |
Heat treatment
Carpenter datasheet, process guidance
- Stress relief and solution in one step: 816–870 °C (1500–1600 °F) for at least 30 minutes, air cool.
- Age: 482 °C (900 °F) for at least 3 hours, air cool.
- HIP to close porosity: at least 100 MPa (14.5 ksi) at about 1121 °C (2050 °F) for 240 minutes or more under inert gas, then solution and age.
- Machine in the solution-annealed condition (about 30 HRC); only light machining after aging.
Corrosion, comparative rating
From wrought-alloy experience; test your printed parts
| Humidity | Restricted | Overall | Limited corrosion resistance |
Specifications, equivalent names and how M300 compares
Specifications
From the manufacturer datasheet
| Applicable | Not listed on the datasheet |
| Associated | AMS6514, AMS6521, AMS6463, AMS-S-46850, SAE J1099 (A538C), MIL-S-46850, UNS K93120, K93130, K93160 |
Equivalent names on LPBF machines
“Similar materials” in the datasheet; for parameter selection only, not machine-maker approvals
| Generic | Maraging steel, ISO X3NiCoMo-Ti18-9-5 |
| 3D Systems | LaserForm Maraging Steel |
| GE Additive (Concept Laser) | M300 |
| EOS | ToolSteel 1.2709 |
| Renishaw | 1.2709 |
| SLM Solutions | 1.2709 |
How it compares
Published tensile data, X–Y direction unless noted, one representative condition per alloy. Conditions differ, so use this to shortlist, not to design.
| Alloy | Condition | Yield, MPa | UTS, MPa | Elongation | Choose it for | 10 kg |
|---|---|---|---|---|---|---|
| M300 | Stress relief + solution + age | 2117 | 2186 | 6% | Highest strength and hardness; limited corrosion resistance | $1,210 |
| 15-5PH | Solution + H900 | 1296 | 1448 | 13.9% | Highest strength of the PH stainless steels; corrosion resistance to 316 °C | $570 |
| 17-4 AR | Solution (Sol) | 1209 | 1342 | 17% | Full martensite; meets ASTM A564 H900 minimums | $695 |
Will it run on my printer?
Carpenter states that PowderRange M300 is compatible with all commercially available laser powder bed fusion equipment. The 15–45 µm F cut is the LPBF cut; for DED and EBM, use the 45–106 µm option above. Ask our materials engineer for starting parameters for your machine.
AO MetalA30 · A50 · A100Benchtop to production LPBF with open parameters. Ask our materials engineer for starting parameters.From $59,000 · A30See AO Metal printers →
FarsoonMetal LPBF lineOpen-platform LPBF from compact R&D frames to 16-laser production systems.FS121M · FS191M · FS200M · FS273M · FS301M · FS350M · FS422M · FS621M · FS721M · FS812M · FS1311M · FS1521MQuote on requestSee Farsoon metal printers →Machine names identify compatible equipment only. Additive Plus is not affiliated with these manufacturers, and the powder is not approved by them. Process parameters are tuned per machine.
Store sealed
Keep the container closed, dry and at room temperature until you load the printer.
Sieve
Sieve before loading and every time you reuse powder recovered from a build.
ATO Sieve · quoteLoad and purge
Fill the dispenser, close the chamber and purge with argon or nitrogen.
Print and relieve
Stress-relieve on the plate, then remove parts and supports.
Recover
Collect unfused powder, sieve it and return it to a sealed container.
Delfin Mistral 451 BL D2 — ATEX metal powder vacuum · $7,175Wear a respirator, gloves and eye protection when handling metal powder. Read the safety data sheet before first use.
Printed on AO Metal
Real builds on the LPBF printers we sell, and what teams make from this alloy.
Parts printed on AO Metal printers, which we sell. Alloys, parameters and powder lots differ from part to part; these photos show the process, not parts made from this specific powder lot.
- Tool inserts for molding and casting
- Tire sipes and molds
- Hard-wearing functional components
Applications as listed by Carpenter Additive for PowderRange M300.
Ordering, delivery and our promise
10 kg of 15–45 µm powder, sealed, traceable to its Carpenter lot certificate.
The ship date shows next to the Add to Cart button. Shipping cost is calculated at checkout.
Card or PayPal at checkout, an invoice, or a purchase order — choose how you buy next to Add to Cart.
100 kg and more: ask for a volume quote with your alloy, quantity and ship-to.
If the powder is not right, we make it right.
If your lot’s chemistry or particle size falls outside its certificate or this page, or it arrives damaged or wrong, tell us within 14 days of delivery. We replace it or refund you, and we pay for shipping both ways.
Complete the workflow
- ✓ 316L — stronger pitting and chemical resistance than 304 stainless
- ✓ Precision-ground flatness for consistent first-layer adhesion
- ✓ Made to order — choose your speed below: Express 2–3 wks, or Standard 6–8 wks (save ~45%)
- ✓ Conductive / antistatic build — no static build-up around ignition-sensitive powder
- ✓ For stainless, nickel & non-reactive AM powder — reactive metals need the inert unit
- ✓ In US stock · ships in 2 business days · genuine Delfin unit · ATEX docs on request
Automated 2-in-1 blasting cell that depowders and surface-finishes powder-bed 3D-printed parts in one enclosed, software-controlled cycle.
- ✓ Depowdering + surface finishing in one ATEX-compliant cell
- ✓ Polymer PBF (SLS, MJF, HSS, SAF) + de-powdered metal parts
- ✓ Lead time: 4–8 weeks — built to order · install + training included
- ✓ High toughness & thermal-fatigue resistance for die-casting tooling
- ✓ Gas-atomized — COA on request
- ✓ Sold in small, workable volumes
Other alloys in US stock now
Premium-grade LPBF powders, COA on request — add to cart or request a formal quote.
Carpenter Additive · Made in AustriaAluminum Alloy Powder AlSi10MgIn stock · ships in ~2 business days$815 / 10 kg · $81.50/kg
Amaero · Made in USATi64 Grade 23 (ELI) Titanium Alloy Powder for Metal 3D PrintingIn stock · ships in ~2 business days$2,405 / 10 kg · $240.50/kg
Carpenter Additive · Made in Sweden316L Stainless Steel Powder for Metal 3D PrintingIn stock · ships in ~2 business days$670 / 10 kg · $67.00/kg
Carpenter Additive · Made in USA15-5 Stainless Steel Powder for Metal 3D PrintingIn stock · ships in ~2 business days$570 / 10 kg · $57.00/kgCommon questions
Don't see yours? Email [email protected] — NDA on request.
What is PowderRange M300 maraging steel powder (15–45 µm)?
How do I heat treat M300 maraging steel?
How does M300 compare with H13 tool steel?
Is M300 maraging steel corrosion-resistant?
Does M300 maraging steel powder come with a certificate of analysis?
How fast does M300 maraging steel powder ship, and how can I pay?
Can I reuse unfused M300 maraging steel powder?
Place your order, or talk to an engineer first
Order M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs direct, or talk to materials engineer