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In gas environments containing corrosive components such as hydrogen sulfide, carbon dioxide, and chloride ions, the following materials are particularly sensitive to stress corrosion: First, carbon steel and low-alloy steel. These materials are commonly used in gas transmission pipelines and downhole equipment; in gas environments with humid hydrogen sulfide or humid CO2, they are highly prone to sulfide stress corrosion cracking. They may also suffer from \"alkaline embrittlement\" under alkaline conditions. Low-alloy tubing steels such as 80SS exhibit even greater sensitivity to stress corrosion in acidic gas-water environments. II. Cr-Ni austenitic stainless steels: These materials are often used in the reinforcement structures of gas pipes. Under the combined action of chloride ions, wet hydrogen sulfide, and hot concentrated alkaline environments present in gas, the original passivation film is easily damaged, leading to typical chloride-ion-induced stress corrosion cracking. Some austenitic stainless steels exhibit even higher sensitivity to stress corrosion than ferritic stainless steels, as indicated by international academic research. III. High-chromium martensitic stainless steels: High-chromium martensitic stainless steels represented by S13Cr-110 and HP-13Cr are prone to stress corrosion cracking in high-temperature and high-pressure gas environments containing CO₂ and phosphates; operations such as acid treatment further increase their tendency to brittle fracture. IV. Other sensitive metal materials: Brass is prone to stress corrosion in gas environments containing ammonia and wet sulfur dioxide ； Aluminum alloys also exhibit significant stress corrosion cracking under gas conditions containing humid hydrogen sulfide.