In stock
- 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
- ✔ Excellent corrosion resistance, ductile and well suited to functional parts
- ✔ Print → debind → sinter to dense 316L on a desktop FFF printer
- ✔ Genuine Zetamix by Nanoe · 500 g spool · lead time 10–20 business days (depending on order queue)
In stock
· Ships in 1–2 business days
In stock
· 2 Business Days
Low-viscosity, semi-translucent laser-SLA resin with a 135 °C glass transition — built for prototypes and quick molds that must hold their shape under heat.
- ✓ Tg 135 °C · 87 Shore D · 65 MPa tensile · 110 MPa flexural
- ✓ 340 cps low-viscosity · 0.08–0.12 mm layers on Kings industrial SLA (355 nm)
- ✓ In stock — ships in 1–2 business days from our Los Angeles warehouse
In stock
· In stock — ships in 1–2 business days from our Los Angeles warehouse.
Nexa3D xMODEL15-Black is an economical 405 nm LSPc photopolymer for fast, high-detail concept and appearance models — 55 MPa tensile, 78–80 Shore D, with a smooth, finish-ready surface.
- ✓ High detail and a paintable, plate-ready finish
- ✓ Runs on Nexa3D XiP, XiP Pro and NXE 400 / NXE 400 Pro — 405 nm LSPc
- ✓ In US stock — ships in 2 business days, lot-matched for repeatable prints
In stock
· 2 Business Days
Chemical- and fatigue-resistant PP pellets qualified for large-format additive manufacturing (LFAM) — light, low-moisture big parts and living-hinge components at pellet cost, unreinforced or glass-fiber reinforced.
- ✓ Broad chemical resistance and living-hinge fatigue behavior — light and low-moisture
- ✓ Ships sealed with a lot datasheet + adhesion and cooling parameters for warp control
- ✓ Lead time: 1–2 business days from L.A. stock — volume & PO on request
In stock
· 1–2 Business Days
- 1K continuous carbon fiber engineered for FibreSeeker 3 co-extrusion
- ~60% fiber volume fraction, tensile strength up to 900 MPa
- Continuous load paths for strong, lightweight structural parts
In stock
· In stock · ships from the US
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
A-Powder AlSi10Mg — AO Metal’s LPBF powder line, 20–63 µm, in 10 kg containers.
- Lot certificate of analysis (COA)
Brand: A-Powder by AO Metal
Made to order
· Ship date confirmed after you orderCommon questions
Don't see yours? Email [email protected] — NDA standard, 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