GE Additive Metal Additive Manufacturing

GE Additive Arcam Spectra H

$1,200,000 - $1,800,000 Updated 2026-03-17

Key Specifications

Build Volume

250 x 430 mm (diameter x height)

Technology

Electron Beam Melting (EBM), high-temperature variant

Electron Beam Power

6,000 W

Maximum Build Temperature

> 1100°C

Layer Thickness

50 – 200 µm

Vacuum Level

< 1 × 10⁻³ mbar

Overview

The GE Additive Arcam Spectra H is a high-temperature electron beam melting (EBM) system engineered specifically for processing nickel superalloys and other refractory materials that require build temperatures well above those achievable on standard EBM platforms. While the standard Arcam A2XX operates at up to approximately 1000°C build temperature and is optimized for titanium, the Spectra H pushes the build chamber temperature to 1100°C and above, enabling the processing of gamma-prime strengthened nickel alloys such as Alloy 718, IN625, and titanium aluminides — materials critical to turbine blade, combustor liner, and hot section aerospace component manufacturing.

The Spectra H features a redesigned build chamber with improved thermal management, a more powerful and precise electron beam column, and an enhanced powder handling system capable of operating at extreme build temperatures without powder sintering-related complications. The vacuum environment is maintained at the same rigorous level as other Arcam systems, protecting reactive superalloy powders from oxygen and nitrogen contamination throughout the multi-hour or multi-day build cycle. Post-build cooling is also carefully controlled to prevent cracking in high-gamma-prime alloys.

GE Additive developed the Spectra H with direct input from GE Aviation and GE Power, both of which produce or prototype turbine components using EBM technology. This internal customer relationship has driven the machine's design toward the specific requirements of aerospace hot-section manufacturing: metallurgical integrity, columnar grain control, and build repeatability across production campaigns. The system is validated with GE's own aerospace material and process specifications.

For aerospace and power generation manufacturers seeking to additively produce nickel superalloy components — particularly those with internal cooling channels, complex geometries, or exotic alloy requirements — the Spectra H is one of a very small number of commercially available systems capable of meeting these processing requirements. Its primary competitors are research-scale or custom EBM installations; the Spectra H is positioned as the production-capable solution for this demanding material class.

Full Specifications

Parameter	Value
Build Volume	250 x 430 mm (diameter x height)
Technology	Electron Beam Melting (EBM), high-temperature variant
Electron Beam Power	6,000 W
Maximum Build Temperature	> 1100°C
Layer Thickness	50 – 200 µm
Vacuum Level	< 1 × 10⁻³ mbar
Compatible Materials	Alloy 718, IN625, TiAl, Ti-6Al-4V, CoCrMo
Beam Spot Size	0.2 – 1.0 mm (variable)
Scanning Speed	Up to 8,000 m/s
Surface Roughness (As-Built)	Ra 25–40 µm
Machine Footprint	~2.4 x 1.1 m
Power Requirement	63 kVA
Tish53	GFW655SSVWW

Strengths & Limitations

Strengths

Build temperature exceeding 1100°C enables processing of nickel superalloys and titanium aluminides not achievable on standard EBM or laser PBF systems
High beam power (6 kW) provides faster scan and melt rates than competing high-temperature AM systems
Vacuum build environment eliminates oxygen contamination risk on reactive superalloy powders during long high-temperature builds
Developed with direct input from GE Aviation — process parameters and material specs are validated against aerospace requirements
Columnar grain microstructure control in nickel alloys enables directional solidification properties relevant to turbine blade applications

Limitations

Extremely high capital cost ($1.2M–$1.8M) limits accessibility to large aerospace OEMs and tier-1 suppliers with strong ROI justification
Material library is narrower than laser PBF systems — optimized for superalloys and titanium; not suitable for aluminum, steel, or tool materials
Long build cycles and complex post-processing (HIP, machining, inspection) result in high per-part lead times for prototype and low-volume production

Best For

Aerospace OEMs and MRO providers producing or repairing turbine blades, vanes, combustor components, and hot-section structures in nickel superalloys Power generation equipment manufacturers producing nickel alloy components for industrial gas turbines requiring high-temperature material integrity Defense contractors and space propulsion manufacturers working with exotic high-temperature alloys for engine and structural applications Advanced manufacturing research institutions developing EBM process parameters for next-generation superalloys and intermetallic compounds

Frequently Asked Questions

01 Why is high build temperature important for nickel superalloy EBM?

Nickel superalloys like Alloy 718 and IN625 are prone to hot cracking during solidification if thermal gradients are too steep. Maintaining a build temperature above the ductile-to-brittle transition temperature (often 900–1000°C for these alloys) keeps the surrounding powder and previously deposited layers warm, reducing thermal stress and preventing cracking. Standard EBM and all laser PBF systems cannot reach the temperatures required for the most demanding superalloy grades.

02 What is titanium aluminide (TiAl) and why is the Spectra H used to produce it?

Titanium aluminide is an intermetallic compound (typically gamma-TiAl) with exceptional strength-to-weight ratio and oxidation resistance at elevated temperatures. It is used in low-pressure turbine blades where its light weight relative to nickel alloys provides performance and fuel efficiency benefits. TiAl is notoriously brittle and crack-prone during conventional casting and machining. EBM at elevated build temperatures allows near-net-shape production with reduced cracking risk.

03 How does the Spectra H's beam power compare to other Arcam systems?

The Spectra H operates with a 6,000 W electron beam, double the 3,000 W beam power of the Arcam A2XX. This higher power is required to achieve and maintain melt pool temperatures in dense nickel superalloy powders while simultaneously sustaining the high build chamber temperature. The more powerful beam column also provides faster scan speeds for improved productivity.

04 Does the Spectra H require HIP (hot isostatic pressing) post-processing?

For most aerospace-critical nickel superalloy applications, HIP is required after EBM to close any residual internal porosity and optimize the grain structure for fatigue and creep performance. The near-zero residual stress of EBM parts (due to the elevated build temperature) means HIP is a densification and microstructure step rather than a stress relief step — unlike laser PBF parts which require separate stress relief before HIP.

05 Who are the primary customers for the Arcam Spectra H?

The Spectra H's primary customer base is aerospace engine OEMs (including GE Aviation internally), tier-1 aerospace suppliers, and advanced manufacturing research centers with superalloy AM programs. Power generation companies (industrial gas turbines) represent a growing secondary market. The high capital cost limits adoption to organizations with sustained demand for superalloy AM components.