Manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates for boilers and other pressure vessels

This document establishes technical specifications for steel plates utilized in the fabrication of boilers and pressure vessels, specifically focusing on manganese-molybdenum and manganese-molybdenum-nickel alloy types. The scope encompasses the chemical composition limits, mechanical property requirements, and testing procedures essential for ensuring material integrity under high-pressure and high-temperature operational conditions. It defines the grading system for these specialized steel products, detailing the necessary heat treatment processes and surface quality criteria. By setting these parameters, the standard serves as a foundational reference for manufacturers and engineers involved in the production and inspection of pressure equipment components. It outlines the methodologies for sampling, tensile testing, and impact testing to verify that the materials meet the stringent safety and performance benchmarks required for industrial applications involving fluid containment. The provisions address both the material selection criteria and the quality assurance measures necessary for compliance with industry-wide safety protocols regarding pressurized systems.