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70 Years in the Thermal Processing Industry​

Over the past 70 years, Rolled Alloys has been committed to servicing the thermal processing industry.

In 1953, the year the company was founded, we introduced RA330® as a wrought replacement to cast HT. Due to RA330®’s versatility and availability, it remains the most widely used wrought alloy by commercial heat treaters.

RA330®

Key features of RA330® include:

  • Oxidation resistance up to 2100°F
  • Creep strength up to 1800°F
  • Sufficient nickel to prevent sigma phase formation
  • Good thermal shock resistance
 

Applications where RA330® commonly finds use include:

  • Heat treatment fixtures
  • Muffles
  • Retorts
  • Shaker Hearths
  • Radiant Tubes

Although RA330 exhibits excellent features, there may be better choices for an application. With this being the case, we offer a wide range of heat-resistant alloys to best suit the needs of your application.

RA 602 CA®

RA 602 CA® is an alloy developed specifically for the highest temperature process, requiring strength and resistance to atmospheres. Many heat-resistant alloys are out in the world, but when considering availability and capabilities, RA 602 CA® is often unmatched.

Key features of RA 602 CA® include:

  • Oxidation resistance up to 2250°F
  • Usable creep strength up to 2100°F
  • Great resistance to carburization and nitriding
  • Immune to sigma phase formation
  • Continuous alumina sub-oxide former
 

Applications where RA 602 CA® commonly finds use include:

  • High-temperature muffles, retorts, and radiant tubes
  • Rotary calciners
  • Vacuum furnace fixtures
  • High carbon potential environments

RA 253 MA®

One last alloy worth discussing is RA253MA. RA253MA is a lean, heat-resistant stainless steel with high strength and oxidation resistance. With excellent high-temperature properties and low nickel content, RA253MA is a cost-effective material that thermal processors frequently utilize for open-air applications.

Key features of RA 253 MA® include:

  • Oxidation resistance up to 2000°F
  • Usable creep strength up to 2000°F
 

Applications where RA 253 MA® commonly finds use include:

  • Muffles
  • Annealing fixtures
  • Wire belts
  • Electrically heated calciners
 

In addition to the alloys discussed in this blog, Rolled Alloys stocks many other heat-resistant alloys, including 309, 310, 800H/AT, 600, 230, 601, and Alloy X. Information on these alloys can be found on each of their respective alloy pages.

 
Please contact the Rolled Alloys Metallurgical Services group at 1-800-521-0332 or submit your questions below.
Ask Metallurgical Services
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