Kobelco - TIG Wire - ER90S-B3Mn

Kobelco TG-S2CM is a premium solid TIG (GTAW) welding rod within Kobelco's TRUSTARC series.
It is engineered for high-temperature, low-alloy creep-resisting steel applications and conforms strictly to the AWS A5.28 ER90S-B3 industry classification (often dual-classified as ER90S-B3Mn depending on regional standardizations).

Key Specifications & Applications
Target Materials: Engineered explicitly for welding 2.25% Chromium and 1% Molybdenum creep-resistant steels. It is the primary choice for joining ASTM A387 Grade 22 plates, A335 Grade P22 pipes, and A213 Grade T22 boiler tubes.
Metallurgical Design: Features a higher alloy content than the S1CM variant. It is enriched with Manganese (Mn) and Silicon (Si) to improve puddle fluidity, ensure clean deoxidation, and deliver exceptional high-temperature tensile and creep rupture strength.
Welding Process: Handled via Gas Tungsten Arc Welding (GTAW / TIG), operating on Direct Current Electrode Negative (DCEN) polarity.
Shielding Gas Requirements: Requires 100% Pure Argon gas for the torch shield. Unlike the TG-X flux-cored series, this solid rod requires an Argon gas back-purge during root-pass welding to prevent backside atmospheric oxidation.
Common Use Cases: Widely specified for root, fill, and cap passes in heavy industrial boilers, oil refinery processing equipment, chemical reactors, and high-pressure steam lines operating up to 575°C.

Grade: ER90S-B91
Spec: AWS A5.28 ER90S B91
Size: 1.6 x 1000mm
One pack = 4Kg