Scientific Analysis of Seamless Boiler Alloy Steel Pipe for Low and Medium Pressure Applications Material Composition and Manufacturing Process Seamless boiler alloy steel pipes, designed for low-pressure (≤2.5 MPa) and medium-pressure (2.5-10 MPa) applications, incorporate alloying elements like chromium, molybdenum, and vanadium to enhance strength, corrosion resistance, and thermal stability. Common grades include ASTM A335