Machine evidence
EOS M 400-4
Decision context / editorial guidance
Screen the application.
Then qualify the process.
Worth investigating if: your supplier can demonstrate the required alloy, geometry and finished-part specification on the quoted EOS M 400-4 configuration.
Do not buy on this page alone: a published envelope or machine configuration does not establish repeatability, accepted-part cost or local support.
Editorial purchasing guidance, not a verified recommendation for a particular application.
Published geometry / not guaranteed part fit
Front view shows X:Z proportions. Depth Y is stated numerically. Supports and clearance reduce usable space.
Compare this machine →Availability unconfirmed
At a glance
What is it?
EOS M 400-4 is a larger LPBF system with a published 400 × 400 × 400 mm build space and four 400 W lasers.
How does it print?
Laser powder bed fusion (LPBF): a laser melts thin layers of metal powder to build a part.
When might I consider it?
Consider it when you need the larger published build space or want to evaluate a four-laser LPBF configuration.
What public specs cannot tell you: finished-part speed, cost, quality or fit for your exact application.
New to AM? Start with the 5-minute guide →
Powder bed fusion · laser powder bed fusion (LPBF) · EOS
Availability and review notes
Source review: . Source-specific review dates appear beside each fact.
Published capabilities
| Capability | Source-backed detail |
|---|---|
| EOS M 400-4 build volume | 400 x 400 x 400 mm (incl. build platform)OEM ↗ · OEM source checked |
| EOS M 400-4 lasers | Yb-fiber; 4 x 400 W; four 250 x 250 mm areas with 50 mm overlapOEM ↗ · OEM source checked |
More published specifications and source notes
| Published detail | Evidence |
|---|---|
| EOS M 400-4 power | max 45.0 kW / typical 22.0 kW; supply 3 x 50 AOEM ↗ · OEM source checked |
| EOS M 400-4 footprint/weight | 5140 x 2490 x 2625 mm; approx 4900 kgOEM ↗ · OEM source checked |
| Materials — OEM scope | OEM-listed examples: AlSi10Mg, IN718, IN625, 316L, Ti64 and MS1. Exact alloy and process qualification still require confirmation.OEM ↗ · OEM source checked |
| Layer thickness | Material-specific examples: AlSi10Mg 40/80 µm; IN625 80 µm; Ti64 60 µm. These are published parameter choices, not a universal machine range.OEM ↗ · OEM source checked |
| Machine weight | Approximately 4900 kg.OEM ↗ · OEM source checked |
| Manufacturer positioning | EOS presents the M 400-4 as a quad-laser production system.OEM ↗ · OEM source checked |
| Gas / atmosphere — stated scope | Inert gas supply: 7,000 hPa; 15 m³/h (102 psi; 706 ft³/h).OEM ↗ · OEM source checked |
| Published print speed / throughput — stated basis | OEM data-sheet build-rate table, material-specific: up to 172.8 cm³/h (EOS Titanium Ti64 Grade 5 / Grade 23); 172.8 cm³/h (EOS Titanium TiCP); 120.96 cm³/h (EOS StainlessSteel 316L); 106.8 cm³/h (EOS MaragingSteel MS1); 100.8 cm³/h (EOS Aluminium AlSi10Mg); 74.9 cm³/h (EOS NickelAlloy IN939); 60.4 cm³/h (EOS NickelAlloy IN718; EOS NickelAlloy HX); 55.3 cm³/h (EOS CaseHardeningSteel 20MnCr5).OEM ↗ · OEM source checked |
What still needs a supplier answer
| Purchasing question | Evidence gap |
|---|---|
| All-in delivered machine price | Current quote required |
| Build time for your part | Not verified for your geometry |
| Alloy and parameters | Confirm the exact qualified combination |
| Application fit | Confirm tolerances, finishing, inspection and local support |
Source review dates identify when the cited material was reviewed. A source review is not a performance test; genuine third-party corroboration is identified separately. The M 400-4 OEM technical table was checked against the cited manufacturer source.
Prepare a useful quote request
Send your exact alloy, dimensions, orientation, supports, inspection criteria and finishing route. Ask for usable build space and effective build time for that configuration. Include installation, training, service, software, gas supply and qualification in the delivered quote. Unverified fields on this page can be used as questions to confirm directly with the manufacturer before purchase.