Aluminum's properties, when looked at in sum, offer many compelling physical and cost of ownership advantages over stainless steel.

Atlas Technologies
305 Glen Cove Road
Port Townsend, WA 98368
Phone: 360-385-3123
Fax: 360-379-5220
E-mail: info@AtlasUHV.com
webmaster@AtlasUHV.com

Atlas Technologies Sales Manager Position
Aluminum Surface Passivation

Vacuum Chambers

Simulation chamber for space & solar system planetary atmospheres for high speed entry, NASA

Simulation chamber for space & solar system planetary atmospheres for high speed entry, NASA
 
Neutron Physics vacuum collision chamber

Neutron Physics vacuum collision chamber
 
Precision low vibration ultra high vacuum chamber

Precision low vibration ultra high vacuum chamber, with stainless steel knife edges and wire seal flanges
 
Lightweight aluminum vacuum chamber for NASA

Lightweight aluminum vacuum chamber for NASA, machined pockets reduce weight while minimizing deflection, Atlas Flanges provide stainless knife edge
 
Copper Ultra High Vacuum (UHV) water cooled Beryllium X-ray window with stainless steel CF flanges

Copper Ultra High Vacuum (UHV) water cooled Beryllium X-ray window with stainless steel CF flanges. Used at LSU synchrotron 

Leaders in Vacuum Technology
Atlas Technologies is a vacuum industry innovator, pioneering the use of many vacuum materials and manufacturing methods. Our experience can improve the performance of your vacuum system while saving you money. 

We listen to you. Our competent design and engineering staff can assist you in determining the best chamber material and our manufacturing engineering staff make sure it is cost effective to build.

Our full manufacturing facility can efficiently manufacture small and large vacuum chambers. We manufacture production chambers as well as one-off and prototype vacuum chambers.

Aluminum Vacuum Chambers: Superior Vacuum Performance - Minimized Cost
Aluminum has less hydrogen and carbon than stainless steel and consequently less H², H²O, & hydrocarbon vapor at high vacuum (HV) & ultra high vacuum (UHV) levels. See references. Atlas Technologies manufactures UHV aluminum vacuum chambers with a thin dense aluminum oxide. This serves as a resistive barrier reducing diffusion & desorption of high vacuum & ultra high vacuum contaminates. Stainless steel chambers, on the other hand, are more permeable to hydrogen and have a comparably large quantity of carbon. 

Once baked, Atlas' aluminum vacuum chambers generally cycle to high vacuum and ultra high vacuum levels faster and require less pumping than stainless steel chambers. In addition, they bake-out faster and more uniformly even at lower temperatures (150 C). This is due to aluminum's high thermal conductivity (10x that of stainless steel). For a more detailed comparison between aluminum vacuum chambers and stainless vacuum chambers take a look at these pages: Ultra High Vacuum Properties of Aluminum and Aluminum Vacuum Chambers Lower the Cost of Ownership

For robust flange connections to aluminum vacuum chambers, Atlas has developed the Atlas Flange and Atlas ATCR™. These components have a rugged de-mountable stainless steel knife-edge or sealing face on an aluminum body for weld-up to an aluminum vacuum vessel. They are fully compatible standard sized ConFlat* and VCR** type components that are capable of crushing either copper or aluminum gaskets. Browse our Atlas CF Flange, Atlas Quick Disconnect Flange and Atlas ATCR™ pages to learn more about these aluminum vacuum chamber sealing options.

In addition to the excellent vacuum properties of aluminum, it is also a more versatile material from a manufacturing standpoint. Aluminum chambers can be machined 5x-plus as fast as stainless steel chambers and therefore less expensively. Aluminum, as a material, is less expensive as well. It can be ordered in several foot thicknesses, can be extruded, and can superplastic flow. Aluminium chambers can be also anodized to add additional chemical resistance. Take a look below at some of the vacuum chamber geometries we provide.

Stainless Steel Vacuum Chambers
Historically, stainless steel has been the de facto vacuum chamber material and for many applications is still preferable. Some of the advantages of stainless steel include its welding ease, its ruggedness, and for small tubular vessels where the flange price represents a large portion of the over all cost, its lower cost. Other advantages are that its strength can permit for thinner vacuum chamber walls than Al. This can be an issue in tight clearance applications. (However, aluminum generally has a higher strength to weight ratio). And for some chemical environments stainless is more corrosion resistant. 

In addition to our aluminum vacuum chamber manufacturing, Atlas also manufactures stainless steel vacuum chambers when appropriate or requested. Our considerable design, engineering and manufacturing experience in vacuum chamber fabrication can simplify and add unexpected benefits to your vacuum vessel. Contact us about any of your vacuum chamber fabrication and vessel fabrication needs.

Titanium Vacuum Chambers
Atlas Titanium vacuum chambers offer extreme vacuum performance with very low hydrogen permeation rates and secondary gasses. Titanium vacuum chambers, due to the gettering properties of this metal, are in many ways the ultimate vacuum material. For extreme high vacuum, Titanium is often the best choice. However, due to its cost and slow machining it is typically used only when  extreme high vacuum is required.

Demountable CF flange sealing to Titanium vacuum chambers is not a problem. Atlas manufactures Titanium Atlas Flanges which have a stainless steel sealing face on a Titanium body. The stainless face matches the coefficient of thermal expansion of other stainless flanges while the Titanium body is welded to the Titanium chamber.

Copper Vacuum Chambers
Copper vacuum chambers and copper alloy vacuum chambers can offer excellent performance for nonmagnetic, radio frequency (RF), and high thermal conductivity applications. 

Many of the advantages for Aluminum chambers also apply to copper vacuum chambers. Copper vacuum vessels can be extruded, have very little photo-desorption, have good thermal stability, are self shielding for some radiation and have low thermal expansion.

Our considerable design, engineering and manufacturing experience in vacuum chamber fabrication can simplify and surprise you with unexpected benefits. Contact us about any of your vacuum chamber fabrication and vessel fabrication needs.

Custom Vacuum Chambers & Specialty Metal UHV Vessels
Atlas also has design, engineering and manufacturing experience for exotic and specialty metal chamber fabrication. Contact us to discuss what you would like to accomplish in vacuum performance and we will work with you to make it a reality. We have no fear of challenges.

*Conflat is a trade mark of the Varian Corporation
**VCR is a registered trademark of the Swagelok Corporation.