ASME SA204 Grade B – Molybdenum Alloy Steel Plate SA204 Gr B is a molybdenum-alloy pressure vessel steel plate, designed for use in high-temperature equipment such as boilers, heat exchangers, and pressure vessels. 🔹 Key Features: Standard: ASME SA204 / ASTM A204 Grade: B Type: Molybdenum-alloy steel Use: Ideal for high-temperature service in boilers and pressure vessels 🔹 Chemical Composition (Typical): Carbon: ≤ 0.20% Manganese: 0.44 – 0.94% Molybdenum: 0.45 – 0.65% Phosphorus / Sulfur: ≤ 0.035% each 🔹 Mechanical Properties: Tensile Strength: 485 – 620 MPa Yield Strength: ≥ 275 MPa Elongation: Min 22% 🔹 Equivalent Grade: ✔️ EN 10028-2 16Mo3 ✔️ DIN 1.5415 16Mo3 is widely accepted as a near-equivalent and often offered as a substitute due to broader availability. 🔹 Applications: Steam boilers Heat exchangers Pressure vessels in refineries & petrochemical plants