In stock
- COA on request — PSD, sphericity, flow rate, chemistry
- Mutual NDA before any file or spec review
M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs
Carpenter Maraging Steel M300 powder price: $1,210 per 10 kg ($121.00/kg)
Maraging tool steel. Easy to harden. AM-proven. Genuine Carpenter PowderRange® M300 (1.2709) for LPBF, EBM & DED metal 3D printing.
- ✓ Exceptional strength & hardness after simple aging
- ✓ Low-distortion AM processability (vs. H13/M2)
What your process engineer actually checks
Locked, traceable lot chemistry
A COA on request documents PSD, sphericity, flow rate, apparent density, and full chemistry — and a lot number you can trace.
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. NDA standard.
PowderRange® M300 is an age-hardenable martensitic maraging tool steel (1.2709) with exceptional tensile strength and hardness for laser powder bed fusion (LPBF), EBM and DED. It is easily heat treated, reaching its superior properties after a simple age-hardening step.
High-carbon tool steels such as H13 or M2 are difficult to process by LPBF; M300 offers comparable mechanical performance with proven additive-manufacturing suitability, thanks to tight control of residual alloying elements.
Why teams buy this powder from Additive Plus
- Genuine Carpenter PowderRange® M300 — vacuum-induction melted, nitrogen gas-atomized for high sphericity and consistent flow.
- Available in small, workable volumes. Most mills sell large minimums and hide pricing behind an account. We stock this alloy and sell it in accessible quantities at a clear, published price.
- COA on request — particle size distribution, chemistry, apparent density and flow rate, with a traceable lot number.
- In US stock — ready to ship. Order online in minutes.
- Need a custom alloy or a tighter cut? We also run our own atomization in-house and can produce custom small-batch powder on request — separate from this stocked product.
What teams print with M300
Representative LPBF parts across aerospace, energy, medical and industrial applications.
Standards & equivalents
- Applicable specification: ASTM A646
- Equivalents / alternate names: Maraging Steel · 18Ni-300 · 1.2709 · X3NiCoMoTi-18-9-5 · LaserForm Maraging Steel
- Machine type: F — LPBF · also E — EBM / DED · Particle size: 15–45 µm · Bottle: 10 kg / 22 lbs
- Carpenter Part No.: 10049585
- Quality: manufactured by Carpenter Additive under AS9100, AS9120, ISO 9001 & ISO 13485 quality systems. (These certifications are Carpenter’s, covering the powder; Additive Plus resells genuine, fully traceable lots and is not itself a certified manufacturer.)
Chemical composition
Typical chemistry (wt%), per the Carpenter PowderRange® datasheet:
| 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% | Nitrogen / Oxygen | ≤ 0.10% each |
| Phosphorus (P) | ≤ 0.010% | Sulfur (S) | ≤ 0.010% |
Heat treatment & processing
- Age-hardenable — a simple, single low-temperature age-hardening step develops the high strength and hardness (no complex quench required).
- Excellent additive-manufacturing suitability 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
- Heat resistant to ~900°F
- High hardness and wear resistance
- Proven, low-distortion processability in LPBF (vs. H13 / M2)
Typical applications
- Tool inserts for molding and casting
- Tire sipes and molds
- Conformal-cooling tooling
- Hard-wearing functional components
Material comparison: M300 vs H13 vs 17-4PH
| Feature | M300 (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 dies | Structural parts, tooling |
Compatible 3D printing systems
Open-parameter LPBF / DMLS platforms this powder runs on.
| Brand | Carpenter Additive |
| Technology | Metal LPBF |
| Powder Package | 10 kg bottle |
| PSD (particle size distribution) | 15–45 micrometres |
| Printing Materials | Metal Powders |
| Material | M300 |
| Country of origin | USA |
| Production Method | Gas Atomization (GA) |
| Application | Composite Tooling, Engineering, Jigs & Fixtures, Manufacturing |
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.
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%)
Immersion-separation industrial vacuum for reactive metal powder — aluminium, titanium and similar alloys — in 3D printing and powder handling. Captures powder under liquid so it's never a dry, ignition-sensitive cloud. ATEX-rated, antistatic, single-phase.
- ✓ For reactive AM powder (Al, Ti, Mg) — the safe alternative to a dry vacuum
- ✓ Two-stage antistatic filtration + grounded construction · ATEX docs on request
- ✓ In US stock · ships in 2 business days · genuine Delfin unit
Hose and tools are not part of the standard configuration. The Delfin KT1006 accessory kit ($721) fits this 2-inch inlet: 10 ft hose, wand, floor brush and nozzle.
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: 6–9 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
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Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What is M300 maraging steel powder?
Which additive manufacturing processes are compatible?
Does M300 require heat treatment?
How does M300 compare to H13?
What industries use M300 maraging steel powder?
What industries commonly use 316L stainless 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