Made to order
- Material certification included
- Mutual NDA before any file or spec review
EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing
What your process engineer actually checks
Flat, stable, and ready for production
Every build plate is manufactured from certified material, precision-machined, and inspected before shipment. Critical dimensions, flatness, thickness, and mounting features are verified to ensure reliable installation and repeatable print results.
Machine-ready compatibility
Build plates are available for EOS, Renishaw, SLM Solutions, Nikon, Trumpf, Additive Industries, and other metal AM platforms. Need a custom mounting pattern or proprietary format? We can manufacture to your drawing.
The EOS M400 SS304 Build Plate is a precision-machined 304 stainless steel platform for EOS M400 laser powder bed fusion (LPBF) systems. Its 360×400×73.66 mm (14.17×15.75×2.9 in) profile is stress-relieved and ground flat for repeatable first-layer adhesion, and it ships in two build speeds — Express in 2–3 weeks or Standard in 6–8 weeks — from our California shop. From $2,050.
Why production teams choose this plate
Spec-backed reasons to run a machined, inspected plate over raw stock or a worn platform.
Dependable stainless, lower cost
304 delivers reliable corrosion resistance and easy machinability for general stainless and tool-steel builds — a cost-effective production workhorse.
Ground flat for consistent first layers
CNC-machined and precision-ground to a tight flatness tolerance so the first fused layer bonds evenly across the full platform — fewer recoater collisions, fewer failed builds.
Substantial profile, more regrind life
A thick starting plate leaves more material to face off and re-flatten after each build cycle before it is retired — more usable life than a thin, single-use plate.
Machined to EOS M400 spec
Each plate is CNC-machined to the EOS M400 clamping and recoater mounting pattern, so it drops into your machine without field-lapping.
How we get it to your build chamber
Every plate ships as a finished, inspected platform — not raw stock.
Machine to spec
Each plate is CNC-machined from certified 304 stainless steel stock to the EOS M400 clamping and recoater pattern.
Stress-relieve & grind
Every plate is stress-relieved, then precision-ground to a flatness tolerance before it ships — no field-lapping required on install.
Inspect & ship
Flatness is checked on the finished plate. Choose your speed at checkout — Express in 2–3 weeks, or Standard in 6–8 weeks at lower cost.
Typical applications
Where production teams run this plate.
Specifications
Full dimensions and attributes for this plate.
| Material | 304 stainless steel |
| Plate thickness | 2.9 in / 73.66 mm |
| Platform size | 14.17×15.75 in / 360×400 mm |
| Compatible systems | EOS M400 |
| Country of origin | USA |
| Lead time | 2–3 wks (Express) or 6–8 wks (Standard) |
Related build plates
Same machine in another alloy, or this alloy on another platform.
| Brand | Additive Plus |
| Country of origin | USA |
| Material | SS304 |
| Platform | M400 |
| Delivery speed | Express (2–3 weeks), Standard (6–8 weeks) |
| Package | 1 plate, 10 plates, 5 plates, 50 plates |
| Dimensions | 14.173×15.748×2.9 in, 360×400×73.66 mm |
We manufacture custom build plates.
Custom dimensions, mounting holes, threaded features, alignment pins, edge chamfers, engraved identification, or special surface requirements. Production-ready custom plates delivered in as little as 2–3 weeks.
Complete the workflow
Versatile. Weldable. Cost-effective. Genuine Carpenter PowderRange® 304 / 304L austenitic stainless steel for LPBF & EBM metal 3D printing.
- ✓ Gas-atomized, low-oxygen — COA on request
- ✓ Sold in small, workable volumes — no large mill minimums
- ✓ In US stock — ready to ship
A-Powder 316L — AO Metal’s LPBF powder line, 15–53 µm, in 10 kg containers.
- Lot certificate of analysis (COA)
Brand: A-Powder by AO Metal
Compact ATEX-certified vacuum for combustible dust and non-reactive metal powder in tight spaces — built to the D2 standard for Zone 22, with antistatic construction and an optional HEPA filter. 1.1 kW, 2-inch inlet, 3-gallon container.
- ✓ Small-footprint ATEX unit for point-of-use metal powder & combustible dust capture
- ✓ Optional HEPA filter · antistatic Class M · reactive metals need the inert unit
- ✓ In US stock · ships in 2 business days · genuine Delfin unit · ATEX docs on request
Hose and tools are sold separately. The Delfin KT1006 accessory kit ($721) fits this 2-inch inlet: 10 ft hose, wand, floor brush and nozzle.
The Farsoon FS350M is a multi-laser LPBF metal 3D printer for medium- to high-volume series production, supplied in 4×500 W, 4×1000 W or 6×500 W laser configurations on the same 17.1×14.1×15.7 in / 433×358×400 mm build cylinder.
- ✓ Three laser configurations — we supply and support all three
- ✓ 17.1×14.1×15.7 in / 433×358×400 mm build on a 65 sq ft / 6 m² class footprint
- ✓ Open platform — full access to process parameters, qualify your own alloy
- ✓ Lead time: built to order — confirmed at quote
Installation and commissioning in the USA: facility and gas planning, start-up and operator training by our US service team.
Other products teams run alongside EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing
Easy-to-print all-round industrial resin with excellent rigidity, an HDT of 122 °C and outstanding chemical resistance — for functional prototypes and demanding industrial parts.
- ✓ 92 MPa tensile · 3600 MPa modulus · HDT-B 122 °C — stiff and heat-stable
- ✓ Outstanding chemical resistance (<1% mass gain) & 0.3% water uptake
- ✓ Post-machinable (drill, grind); long-term thermal stability
- ✓ A cost-effective alternative to Loctite IND249 High Temp
Made to order
· Ships in 5–10 business days
High strength. Cleaner properties. Heat-treatable. Genuine Carpenter PowderRange® 15-5 (15-5PH) precipitation-hardening stainless steel for LPBF metal 3D printing.
- ✓ Gas-atomized, low-oxygen — COA on request
- ✓ Sold in small, workable volumes — no large mill minimums
- ✓ In US stock — ready to ship
In stock
· In US stock · ready to ship
Low-viscosity ESD resin with real toughness for final-part production — dissipative volume resistivity (5.5 × 10⁷ Ω·cm) plus 65 MPa strength and HDT-B 94 °C.
- ✓ ESD-dissipative — volume resistivity 5.5 × 10⁷ Ω·cm for static-safe parts
- ✓ Tough & strong — 65 MPa tensile, 2700 MPa modulus, 86 Shore D
- ✓ HDT-B 94 °C, excellent chemical resistance; easy low-viscosity processing
- ✓ A similar option to Loctite IND3380 ESD
Made to order
· Ships in 5–10 business days
NASA-developed. Oxide dispersion strengthened. Oxidation-resistant to 2400°F. Genuine Carpenter Additive GRX-810 Coated nickel-cobalt-chromium powder for LPBF metal 3D printing.
- ✓ About 2× the strength of 718 and 625 at 2000°F (NASA data)
- ✓ COA on request (15–45 µm, 10 kg)
- ✓ In US stock — ready to ship
In stock
· In US stock · ready to ship
CNPC Inconel 718 powder for LPBF — made by CNPC Powder, gas-atomized, 15–53 µm, sold in 10 kg containers.
- 10 kg container · $90/kg · $900
- Certificate of analysis (COA) for the lot, on request
- Ship date confirmed by email after you order
Manufacturer: CNPC Powder · materials engineer on call · order below or talk to an engineer first.
Made to order
· Ships in 6–8 weeks
Flexible TPE pellets qualified for large-format additive manufacturing (LFAM) — rubber-like elasticity and a range of Shore-hardness grades for big seals, gaskets, and grips at pellet cost.
- ✓ Rubber-like flexibility with vibration and impact damping — soft to semi-rigid grades
- ✓ Ships dry with a lot datasheet + drying, flow, and retraction parameters
- ✓ Lead time: 1–2 business days from L.A. stock — volume & PO on request
In stock
· 1–2 Business Days
Chemical-resistant HDPE pellets qualified for large-format additive manufacturing (LFAM) — low-moisture, low-friction big parts and wet-environment tooling at pellet cost.
- ✓ Broad chemical resistance and very low moisture uptake — built for tanks and marine
- ✓ Ships sealed with a lot datasheet + drying, adhesion, and cooling parameters
- ✓ Lead time: 1–2 business days from L.A. stock — volume & PO on request
In stock
· 1–2 Business Days
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 — COA on request
- ✓ Excellent biocompatibility & non-magnetic (MRI-safe)
- ✓ Sold in small, workable volumes · in US stock, ready to ship
In stock
· In US stock · ready to shipWhat our customers say
“Harry and team were professional, effective communicators as we set up the order, then they executed quickly and produced an amazing product for us at a very competitive price. Am looking forward to our next print w Additive Plus!”
“Great 3D printing service and the resin parts look super smooth and clean. Really happy with how everything turned out!”
“Harry was very professional and helped me out with my 3D printing needs and explained what options I have in terms of filaments such as PEEK. Highly recommended.”
“I needed a 3D enclosure printed urgently in a specific time period, they did great!”
Common questions
Don't see yours? Email [email protected] — NDA on request, typical reply within 4 hours.
How does the M400 Steel Build Platform improve thermal stability in large-format LPBF builds?
What makes this M400 Steel Build Platform different from a standard EOS M400 build plate?
Is the M400 Steel Build Platform suitable for high-stress metal additive manufacturing applications?
How does the stainless steel build platform affect first-layer adhesion on EOS M400 systems?
Can the M400 Steel Build Platform be used as a direct OEM replacement EOS M400 build plate?
What materials are compatible with the M400 Steel Build Platform in LPBF applications?
-Stainless steels (316L, 17-4PH)
-Tool steels
-Aluminum alloys
-Nickel-based alloys
-General-purpose titanium builds
The SS304 base material provides reliable performance across common industrial metal powders.
How does the 76.2mm thickness of the M400 build platform impact residual stress control?
Is this metal building platform for EOS suitable for multi-part batch production?
Can the stainless steel build platform be resurfaced or re-machined?
How does the M400 Steel Build Platform compare to optimized lightweight build platforms?
Place your order, or talk to an engineer first
Order EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing direct, or talk to materials engineer