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In every order
- Full lot COA — PSD, sphericity, flow rate, chemistry
- Qualified parameter sets for the major LPBF systems
- Mutual NDA before any file or spec review
- Free U.S. shipping over $200 · fast dispatch from L.A.
Materials, Metal Build Plates 3D Printing Materials, Standard
EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing
The M400 Steel Build Platform is a heavy-duty SS304 stainless steel build plate engineered for EOS M400 systems. Designed for large-format LPBF production, it delivers superior thermal stability, structural rigidity, and repeatable industrial metal 3D printing performance.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates and building platforms for most industrial metal AM systems.
NDA standard
Ships in 1–2 business days
Spec-match guarantee on every lot
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.
Qualified parameters, not just powder
Validated parameter sets for EOS M 290, Renishaw 500Q, SLM 280, and our own AO Metal LPBF ship with the order. Load the profile and hit density on the first build — no parameter-development burn.
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
The M400 Steel Build Platform is engineered for manufacturers operating large-format metal 3D printing systems such as the EOS M400 and EOS M400-4. Built from high-grade SS304 stainless steel, this industrial building platform provides the thermal mass and mechanical rigidity required for demanding LPBF production environments.
Large components and extended build cycles require predictable thermal behavior. The M400 Steel Build Platform ensures consistent heat distribution across the full 360×400mm surface, minimizing distortion and maintaining dimensional accuracy during long manufacturing runs.
Precision CNC machining, stress-relief processing, and surface grinding guarantee flatness within tight tolerances. This stainless steel build platform supports stable recoater interaction, uniform powder spreading, and reliable first-layer fusion — critical factors in industrial metal additive manufacturing.
Designed as a direct OEM-compatible replacement, the M400 Steel Build Platform integrates seamlessly into EOS M400 systems without modification.
Key Features & Benefits
Large 360×400mm Build Surface
Maximize your EOS M400’s capacity to print larger parts or multiple components in one run, improving throughput and lowering cost per part.
Durable 304 Stainless Steel Construction
A cost-effective and reliable choice for printing with various metal powders, offering durability, corrosion resistance, and excellent performance across industrial applications.
Thick 76.2mm Thermal Mass
The substantial build plate thickness provides superior thermal stability, minimizing distortion and ensuring consistent layer quality during long production cycles.
Precision-Ground Flatness
Machined to tight tolerances to achieve a perfectly even surface, guaranteeing strong first-layer adhesion and reducing print failures or material waste.
Direct EOS M400 Compatibility
Engineered as a seamless OEM replacement, ensuring easy installation and reliable operation on EOS M400 and M400-4 systems.
Why Choose This Build Plate?
- Versatile for Multiple Materials: Compatible with steel-based and general-purpose metal powders.
- Reliable Performance: 304 stainless steel balances strength, heat resistance, and longevity.
- Optimized for Production: Consistent results at an economical price for high-volume manufacturing.
- Minimized Downtime: Designed for fast replacement and stable, long-term use.
Ideal For
- Industrial Manufacturing: Fixtures, tooling, and functional metal components.
- Service Bureaus: Affordable solution for large-scale, continuous 3D printing production.
- R&D and Material Testing: Great platform for developing and testing new metal powders.
- General Metal AM: Perfect for metal printing applications not requiring titanium-specific properties.
The EOS M400 SS304 Build Plate is your reliable, cost-effective metal printing platform — delivering stability, precision, and value for every build.
| Brand | Additive Plus |
| Country of origin | USA |
| Material | SS304 (AMS 5513) |
| Platform | M400 |
| Package | 1 plate, 10 plates, 5 plates, 50 plates |
| Dimensions | 14.173×15.748×2.9 in, 360×400×73.66 mm |
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
What teams add to an order so the first build runs clean — handling, plates, and a sample to qualify before you commit volume.
Dental
EOS M280 EOS M290 Ti64 Build Plate - Titanium Metal Build Platform for LPBF
High-purity Ti-6Al-4V build plate engineered for EOS M280 and M290 systems. Designed for contamination-free titanium printing with stable thermal behavior and repeatable LPBF performance.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates for most metal AM systems.
Request a custom quote — we manufacture precision build plates for most metal AM systems.
From $1550
Get quote
6-8 weeks
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EOS M290 SS304 Build Plate | 50mm Stainless LPBF Platform
SS304 stainless steel build plate for EOS M280/M290 systems. 50mm optimized profile for faster thermal cycling and stable LPBF metal printing.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates for most metal AM systems.
Request a custom quote — we manufacture precision build plates for most metal AM systems.
From $580
Get quote
6-8 weeks
Composite Tooling
EOS M290 SS316 Build Plate | 50mm Corrosion-Resistant LPBF Platform
SS316 stainless steel build plate for EOS M280/M290 systems. 50mm optimized profile for corrosion-resistant and stable LPBF metal printing.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates for most metal AM systems.
Request a custom quote — we manufacture precision build plates for most metal AM systems.
From $720
Get quote
6-8 weeks
Materials
EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing
The M400 Steel Build Platform is a heavy-duty SS304 stainless steel build plate engineered for EOS M400 systems. Designed for large-format LPBF production, it delivers superior thermal stability, structural rigidity, and repeatable industrial metal 3D printing performance.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates and building platforms for most industrial metal AM systems.
From $2050
Get quote
6-8 weeks
Materials
EOS M400 SS316 Build Plate | M400 SS316 Build Platform for Metal 3D Printing
The M400 SS316 Build Platform is a heavy-duty stainless steel build plate engineered for EOS M400 systems. Designed for large-format LPBF metal 3D printing, it delivers superior corrosion resistance, thermal stability, and repeatable performance in demanding industrial environments.
Need a build platform for a different printer model or custom dimensions?
Request a custom quote — we manufacture precision build plates and building platforms for most industrial metal AM systems.
From $2550
Get quote
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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.
From $4750
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Dental
SLM 280 Ti64 Build Plate | Titanium SLM 280 Build Platform
The SLM 280 Ti64 Build Platform is a precision-machined titanium build plate engineered for high-performance LPBF production. Manufactured from aerospace-grade Ti-6Al-4V (Grade 5), this titanium build plate for SLM 280 prevents cross-contamination, enhances thermal management, and ensures consistent first-layer adhesion for mission-critical aerospace and medical components.
Need a titanium build platform for another printer model or custom thickness?
Request a custom quote — we manufacture precision titanium and metal build plates for most industrial LPBF systems.
From $3100
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SLM 280 SS304 Build Plate | SLM 280 SS304 Build Platform 73.66 mm
The SLM 280 SS304 Build Platform is a precision-ground stainless steel build plate engineered for reliable LPBF production. Manufactured from high-grade 304 stainless steel and designed as a direct OEM-compatible solution, this SLM 280 metal build plate delivers excellent flatness, thermal stability, and repeatable first-layer performance for industrial additive manufacturing.
Need a custom steel build platform for another printer or alternative thickness? Request a custom quote — we manufacture precision stainless steel and specialty alloy build plates for most industrial LPBF systems.From $1400
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SLM 280 SS316 Build Plate | SLM 280 SS316 Build Platform 73.66 mm
The SLM 280 SS316 Build Platform is a corrosion-resistant stainless steel build plate engineered for demanding additive manufacturing environments. Manufactured from premium 316 stainless steel and precision-ground for superior flatness, this SLM 280 SS316 build plate delivers reliable first-layer adhesion, stable thermal performance, and consistent industrial-grade LPBF results.
Need a custom stainless steel build platform or alternative alloy for your LPBF system? Request a custom quote — we manufacture precision steel and specialty alloy build plates for most industrial metal 3D printers.
From $1520
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From process engineers running EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing
Unedited feedback from customers who reorder EOS M400 SS304 Build Plate | M400 Steel Build Platform for Metal 3D Printing.
★★★★★
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.
How does the M400 Steel Build Platform improve thermal stability in large-format LPBF builds?
The M400 Steel Build Platform features a 76.2mm thick SS304 stainless steel structure that increases thermal mass and reduces temperature gradients across the 360×400mm surface. This minimizes residual stress, distortion, and base-layer deformation during extended LPBF production cycles.
What makes this M400 Steel Build Platform different from a standard EOS M400 build plate?
Unlike thinner build plates, the M400 Steel Build Platform is engineered specifically for large-format industrial production. Its increased thickness, stress-relieved machining process, and precision-ground surface provide greater structural rigidity and improved dimensional consistency compared to lightweight EOS M400 build plate alternatives.
Is the M400 Steel Build Platform suitable for high-stress metal additive manufacturing applications?
Yes. The stainless steel build platform is designed to withstand high thermal loads and mechanical stress generated during LPBF processing. It supports stable melt pool behavior and maintains flatness during long-duration builds.
How does the stainless steel build platform affect first-layer adhesion on EOS M400 systems?
The precision-ground surface of the M400 Steel Build Platform (±0.05 mm flatness tolerance) ensures uniform contact between powder and substrate. This improves first-layer fusion, reduces the risk of delamination, and enhances overall build reliability in EOS M400 metal 3D printing workflows.
Can the M400 Steel Build Platform be used as a direct OEM replacement EOS M400 build plate?
Yes. The M400 Steel Build Platform is engineered as a direct OEM-compatible replacement for both EOS M400 and M400-4 systems, ensuring seamless integration without hardware modification.
What materials are compatible with the M400 Steel Build Platform in LPBF applications?
This LPBF build platform is compatible with:
-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.
-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?
The increased thickness of the M400 Steel Build Platform improves heat retention and distribution, reducing localized cooling rates. This helps control internal stresses and improves dimensional stability in large structural metal parts.
Is this metal building platform for EOS suitable for multi-part batch production?
Yes. The rigid structure and stable thermal behavior of the M400 Steel Build Platform make it ideal for multi-part production builds where consistent layer bonding and uniform heat distribution are critical.
Can the stainless steel build platform be resurfaced or re-machined?
Yes. The M400 Steel Build Platform can be resurfaced using precision machining procedures, extending operational lifespan and maintaining flatness for continued LPBF production.
How does the M400 Steel Build Platform compare to optimized lightweight build platforms?
While lightweight plates offer faster heat-up times, the M400 Steel Build Platform prioritizes dimensional stability and long-cycle reliability, making it better suited for large-format industrial manufacturing.
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