EX90SB300000930TS2 - Exocor ER90S-B3 Chrome-Moly TIG Rod 3/32" Stamped (10lb)

Premium Chrome-Moly TIG Welding Rod for High-Temperature Service

The Exocor ER90S-B3 TIG Rod is a high-performance low-alloy steel filler metal designed specifically for the welding of 2.25% Chromium, 1% Molybdenum steels. Often referred to in the industry as "2 1/4 Chrome," this alloy is critical for applications requiring exceptional strength and creep resistance at elevated temperatures. This specific rod features a diameter of 0.093 inches (approx. 3/32" or 2.4mm) and comes in standard 36-inch cut lengths, packaged in a durable 10 lb tube to maintain cleanliness and prevent moisture absorption.

One of the standout features of this Exocor product is the stamped identification on the rod itself. In industries such as power generation, petrochemical processing, and pressure vessel fabrication, material traceability is paramount. The stamped classification ensures that welders and inspectors can instantly verify that the correct filler metal is being used, significantly reducing the risk of costly material mix-ups and ensuring compliance with rigorous ASME and ISO quality standards.

Metallurgically, the ER90S-B3 classification indicates a minimum tensile strength of 90,000 psi. The addition of Chromium and Molybdenum provides the necessary resistance to hydrogen attack and creep-rupture in service environments that can reach up to 1100°F (approx. 600°C). This makes it the filler metal of choice for joining P22 and T22 pipes, tubes, and boiler components. To achieve optimal mechanical properties and prevent cracking, proper pre-heat and post-weld heat treatment (PWHT) procedures are typically required when working with this alloy group. The wire is manufactured to strict tolerances, ensuring a clean surface finish that promotes stable arc transfer, excellent wetting action, and porosity-free deposits.

Whether you are fabricating steam piping systems, heat exchangers, or heavy-wall pressure vessels, the Exocor ER90S-B3 offers the reliability and consistency demanded by critical code work. Its formulation is balanced to match the base metal's coefficient of thermal expansion and mechanical properties, ensuring the longevity and safety of the welded joint under thermal cycling and stress.