Solar Atmospheres is one of the world’s largest providers of commercial vacuum heat treating services. Through unmatched technical expertise, equipment, and quality assurance, Solar’s thermal processing produces bright, scale-free parts with minimal distortion. For clients requiring an “out-of-the ordinary” application, an in-house R&D team of metallurgists and scientists develop innovative, custom process solutions. Solar serves over 18 metal working industries including aerospace, medical, and power generation. Our state-of-the art services include vacuum heat treating, brazing, carburizing, nitriding, Fluorescent Penetrant Inspection, and advanced processing of raw materials such as titanium, tantalum, and nano powders.  With over 60 furnaces ranging from lab sized to 48 feet long with a 150,000 lb. workload capacity, Solar can efficiently handle any size job. Headquartered in Souderton, PA near Philadelphia, Solar also operates plants in Hermitage, PA near Pittsburgh and in Fontana, CA, near Los Angeles, and Greenville, SC. Nadcap, ISO 9001:2015 and AS9100D, ITAR, and MedAccred Certified

About Solar Atmospheres,

A Commercial Heat Treating Company

Unsurpassed quality and capacity for vacuum heat treating and brazing

climate controlled room

Solve your thermal processing challenges with our advanced technical expertise, world-class equipment, and quality assurance.  Contact us today to learn how you can benefit from our:

  •  4 plant sites – Souderton (Eastern PA), Hermitage (Western PA), Fontana, California and Greenville, South Carolina serving over 18 industries including Aerospace, Automotive, Defense, Medical, Power Generation and more
  •  Over 60 furnaces with advanced ten to twenty bar quenching from lab-sized to one of the world’s largest commercial vacuum furnace (up to 48 feet long with a 150,000 pound capacity)
  • Continuously upgraded, state-of-the-art furnace technology from sister company Solar Manufacturing led by CEO William R. Jones, a pioneer in the field of vacuum furnace technology
  • Expert metallurgical consultation and R&D services for custom processes and unique challenges
  • Quality results and coast-to-coast, 24/7 responsive service
  • On-site laboratory for hardness and microhardness testing

Mission Statement

The mission of Solar Atmospheres is to add significant value to our customer’s operations by thermally treating parts, principally in a vacuum environment, with an unwavering commitment to honesty in all relationships. We will strive to fulfill this mission while:

  •  Performing our work with an emphasis on quality and responsiveness
  •  Operating with an awareness and appreciation of the value of our customer’s parts while in our care
  •  Forever looking “forward” in the area of technical capabilities
  •  Demonstrating a willingness to “accept the challenge”
  •  Providing and maintaining a work environment that is safe, clean and reflects our respect for human dignity
  •  Providing our employees with an opportunity for personal growth, challenge and reward
  •  Maintaining a workplace that is environmentally friendly
  •  Sustaining long-term growth and profitability


Through our foundational strengths—processing skills, furnace engineering knowledge, metallurgical consultation, and commitment to service—Solar has gained a reputation for quality heat treating and responsive service.

Our customers regularly express appreciation for Solar and its people going the “extra mile.” Taking on the challenge as a commitment to new types of work is evidenced by the R&D work done for universities and national laboratories.