Abstract This paper aims to explore the material standards for alloy steel flanges. By delving into different international and industrial standards, it analyzes the requirements for chemical composition, mechanical properties, and manufacturing processes of alloy steel used in flanges, which is of great significance for ensuring the quality and safety of flanges in various applications.

The quality inspection standards for Alloy Steel Flange mainly include the following aspects: Material standards Chemical composition: According to ASTM A182 and other standards, the content of carbon, chromium, molybdenum, nickel and other elements in alloy steel flanges is accurately determined using spectroscopic analysis and other methods to ensure compliance with the corresponding material’s chemical