87 Gr.11 Cl.1 Chromium‑Molybdenum Alloy Pressure Vessel Steel Plate ASME SA3

ASME SA387 Gr.11 Cl.1 is a chromium-molybdenum alloy steel plate primarily intended for welded boiler and pressure vessels designed for elevated temperature service. It contains approximately 1.25% Chromium and 0.5% Molybdenum, offering excellent creep strength and resistance to hydrogen attack at high temperatures. The material is typically supplied in normalized and tempered condition.