Free U.S. shipping on orders over $200 · Mutual NDA standard before any file review.
Talk to an engineer →
In stock
In every order
- Full lot COA — PSD, sphericity, flow rate, chemistry
- Mutual NDA before any file or spec review
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
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)
- ✓ Full COA on every lot · small volumes · fast dispatch from L.A.
NDA standard
Ships in 1–2 business days
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.
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
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.
- Full COA with every lot — particle size distribution, chemistry, apparent density and flow rate, with a traceable lot number.
- Fast dispatch from Los Angeles.
- 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.
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
- 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 |
| 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) |
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
Engineering
EOS M290 SS316 Build Plate | 50mm Corrosion-Resistant LPBF Platform
316L stainless steel build plate for EOS M280/M290 LPBF systems. 9.92×9.92×1.97in (252×252×50mm) profile, CNC-machined and ground flat for consistent stainless and tool-steel builds.
- ✓ 316L — stronger pitting and chemical resistance than 304 stainless
- ✓ Precision-ground flatness for consistent first-layer adhesion
- ✓ Lead time: 6–8 weeks — configured to order
From $720
Get quote
6-8 weeks
Additive Manufacturing Solutions
Delfin Industrial Vacuum Cleaner For 3D Printing & Powder Applications
Ideal for reactive metal powders (Al, Ti, etc.) used in AM or lab.
From $11391
Add to cart
Depowdering stations
AM Solutions S1 — Automated Depowdering & Surface Finishing System
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
For Cleaning, Surface finishing
From $69920
Add to cart
Lead time: 6–9 weeks — built to order. Install and operator training included.
Composite Tooling
H13 Tool Steel Powder for Metal 3D Printing | LPBF - 10 kg / 22 lbs
Hot-work tool steel. Thermal-fatigue resistant. High-temp strength. Genuine Carpenter PowderRange® H13 (1.2344) for LPBF metal 3D printing.
- ✓ High toughness & thermal-fatigue resistance for die-casting tooling
- ✓ Gas-atomized — full COA on every lot
- ✓ Sold in small, workable volumes · fast dispatch from L.A.
For DED, EBM, Metal LPBF
From $440
Get quote
5-10 business days
Not ready for a full bottle? Request a sample or a custom quantity.
Other products teams run alongside M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs
DLP 3D Printing Materials · LSPc, DLP, XiP
Nexa 3D PRO9499 White Resin 1.5 kg
PRO9499 is a high-performance photopolymer white resin developed for Freeform Injection Molding (FIM). The resin is optimal for prototyping injection molding parts without the hassle of complex mold design.
From $135
Add to cart
In stock
Cobalt Base · Metal LPBF
A-Powder Cobalt Chrome Powder (CoCrMo) for Metal 3D Printing | LPBF Compatible – 10 kg / 22 lbs
Additive Plus A-Powder — industrial CoCr (CoCrMo) 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
Prints CoCrMo
From $1470
Get quote
In stock
· 5-10 Business Days
DLP 3D Printing Materials · LSPc, DLP, XiP
Nexa3D xMODEL17-Clear 1.5 kg Resin for XiP
Introducing xMODEL17-clear, a high-clarity, prototyping resin from Nexa3D. xMODEL17-Clear prints in unmatched clarity and with fine feature detail—all at eye-watering speeds.
From $208
Add to cart
In stock
Dental · LSPc, DLP, XiP
Nexa3D KeyTray Resin 1kg
KeyTray is a strong, biocompatible (Class I) 3D printing resin designed to create customized, individual impression trays quickly and with precision. The material is strong and durable to withstand the forces of taking a patient impression and removing the tray from the oral cavity. It is compatible with all types of impression material.
From $277
Get quote
Out of stock
Engineering
CreatBot ABS Filament - 1kg
ABS engineering filament for FDM 3D printing — high impact strength, 78°C HDT (0.45 MPa, ISO 75), and a validated CreatBot F430 print profile for functional prototypes and production tooling.
- ✓ ±0.02mm diameter tolerance — consistent extrusion, low jam risk
- ✓ Validated print profile + datasheet included
- ✓ In stock, ships in 1–2 business days
From $20
Add to cart
In stock
· 1–2 Business Days
Composite Tooling · FFF
Zetamix Porcelain Filament 1,75mm
Print fine porcelain on a standard FFF printer, then fire and glaze for art, tableware and decorative ceramic pieces.
- ✔ Smooth, glazeable porcelain finish with a classic ceramic look
- ✔ Print → debind → fire — ceramic printing on an everyday FFF machine
- ✔ Genuine Zetamix by Nanoe · 500 g spool · lead time 10–20 business days (depending on order queue)
From $225
Add to cart
In stock
Materials
EOS M400 Ti-6Al-4V Build Plate | M400 Ti64 Build Platform for Metal 3D Printing
The M400 Ti64 Build Platform is a large-format Ti-6Al-4V titanium build plate engineered for EOS M400 systems. Designed for aerospace, medical, and high-value industrial applications, this titanium platform provides unmatched material purity, thermal stability, and repeatable LPBF performance.
Need a titanium build platform for a different printer model or custom dimensions? Request a custom quote — we manufacture precision titanium build plates and additive manufacturing platforms for most metal AM systems.
Prints Ti-6Al-4V
From $4750
Get quote
In stock
· 6-8 weeks
Cobalt Base · Metal LPBF
Medical-Grade Cobalt Chrome Alloy Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs
Implant-grade. Biocompatible. Wear-resistant. Genuine Carpenter PowderRange® CCM cobalt-chrome (CoCrMo, ASTM F75) for LPBF, EBM & DED metal 3D printing.
- ✓ VIM-melted, nitrogen gas-atomized — full COA on every lot
- ✓ Excellent biocompatibility & non-magnetic (MRI-safe)
- ✓ Sold in small, workable volumes · fast dispatch from L.A.
Prints CoCrMo
From $2050
Get quote
In stock
· 2 Business DaysFrom 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 M300 Maraging Steel Powder for Metal 3D Printing | LPBF Compatible - 10 kg / 22 lbs direct, or talk to materials engineer