70 Years in the Thermal Processing Industry

August 4, 2023
9:24 am

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Nickel, Products, Thermal Processing

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.

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