A286 per AMS 5858 Steel, Corrosion and Heat Resistant, Sheet, Strip, and Plate, 15Cr – 25.5Ni – 1.2Mo – 2.1Ti – 0.006B – 0.30V, Multiple Melted, 1800 °F (980 °C) Solution Heat Treated, Welding Grade, Precipitation Hardenable
A286 per AMS 5858 is melted multiple times, and then solution heat-treated at 1800 °F (980 °C)
AMS 5858 isn’t aged, which is preferable for welding. That’s because cracking can occur if the parts are already aged. Meanwhile, you can use regular welding procedures on A286, including gas tungsten arc, gas metal arc, and shielded metal arc. For the highest weld strength, the weld bead should be convex.
Fighter Jet Metals offers AMS 5858 in the form of plate, sheet, and strip.