ALLOY X

Consumables tailored for welding Hastelloy X base metal and executing dissimilar welding between this alloy and nickel base alloys, stainless steel, carbon steel, and low alloy steels are adept at cladding steel with nickel-chromium-molybdenum weld metal through both Gas Tungsten Arc Welding (GTAW) and Gas Metal Arc Welding (GMAW). These consumables exhibit remarkable strength and oxidation resistance, particularly notable in environments with temperatures reaching up to 1200°C. The filler metal in question presents an outstanding amalgamation of oxidation, corrosion, and thermal shock resistance. Weld deposits formed with this consumable showcase elevated temperature strength and effectively resist weld metal fatigue at temperatures up to 1200°C. Widely employed in the aerospace sector, this consumable plays a pivotal role in fabricating engine tailpipes, turbine blades, nozzle vanes, and afterburner components. Additionally, its utility extends to petrochemical applications where it serves to counteract stress corrosion cracking.

The nominal composition (wt. %) of filler metal of this classification is 47 Ni, 22 Cr, 18 Fe, 9 Mo, and 1.5 Co.

Austenitic.

Ni-Cr-Mo high temperature strength nickel alloy used for welding similar base metals such as Hastelloy X and Inconel Alloy HX to itself or to Stainless Steels, Carbon Steels or low-alloy Steels.
ASTM: B 366, B 435, B 572.
UNS: N06002.
PROPRIETARY: Hastelloy® X Alloy (Haynes International Inc).

Prior to welding or heating nickel-base alloys, ensuring base metal cleanliness is crucial. Common contaminants like oil, grease, paint, lubricants, and marking pencils can contain sulfur or lead, posing a risk of embrittlement in both the base metal and weld metal. Typically, preheating nickel alloys is unnecessary, except to bring the metal in the welding area to room temperature. Adhering to a low heat input, capped at 1.5 kJ/mm, and observing an interpass temperature limit of 150°C is critical. In most cases, solid solution nickel alloys do not require post-weld heat treatment for corrosion resistance.