BLT-S400 by Bright Laser Technologies (BLT): status and timeline

BLT-S400

The BLT-S400 system specialized in copper powder-bed fusion, addressing a historically difficult material for metal 3D printing. Used for rocket engines and heat-transfer applications.

DeployStage 4 of 5

In production, reached 100,000 cumulative copper component units in March 2026.

Checked 10 Oct0 updates this week

Milestones

No announced next step

BLT-CuCrZr alloy developed2024Complete.
100,000 cumulative copper components milestoneMar 2026Complete.

Current obstacles

Copper's reflective propertiesCopper reflects 95% of near-infrared laser light, requiring high laser power and tight focus control. Few competitors have solved this at production scale.

Physics limits

Heat conductivity draws energy from the melt poolCopper conducts heat ~400 W/m·K, nearly as fast as the laser can add energy, limiting build speed and requiring higher power lasers than for steel or titanium.

How it works

2 parts

Copper alloy chemistry

Custom BLT-CuCrZr formulation

BLT-CuCrZr balances reflectance (95% of NIR light) and thermal conductivity, enabling reliable laser melting of copper.

Thermal control

Preheating and laser focus

Precise laser power and beam focusing, combined with preheating of the powder bed, maintain a stable melt pool in the highly conductive copper alloy.

Spec sheet

Spec	BLT-S400
Primary material	Copper alloys (BLT-CuCrZr and derivatives)^R (reported)
Cumulative production (as of March 2026)	100,000+ copper components^R (reported)

^R reported by the company

About Bright Laser Technologies (BLT)

The team behind BLT-S400

Bright Laser Technologies (BLT)

Metal 3D printing, LPBF, BLT-S1500

BLT builds fiber-laser powder-bed fusion systems for metal 3D printing. Founded in Xi'an in 2011, it is China's largest metal-AM maker with 2,800+ customers and listed on Shanghai's STAR Market (688333).

BLT delivered solutions to 2,800+ customers worldwide as of June 2024, spanning North America, Europe, Asia-Pacific, and other regions.
March 2026: BLT-S400 achieved 100,000 cumulative copper alloy components—the first large-scale production at this scale.
The BLT-S1500 features 26 fiber lasers with a 1500×1500×1200 mm build platform for aerospace engine casings and aircraft structures.

xa-blt.com (opens xa-blt.com)Company profile →

Founded: 201115 yrs
Headquarters: China
Status: Public
Listed: 688333Shanghai STAR
Valuation: public
Works in: ManufacturingMetal 3D printing
Coverage: 2 programs · 3 updateslatest 1 Mar 2026checked 10 Oct
Partners: GoEngineer (opens goengineer.com)

Spec

BLT-S400

Primary material

Copper alloys (BLT-CuCrZr and derivatives)^R (reported)

Cumulative production (as of March 2026)

100,000+ copper components^R (reported)