Brittleness at 475 ℃ of Stainless Steel and Influence Analysis
After the stainless steel is heated for a long time in the temperature range of 450 to 550℃,there will be a significant decrease in impact toughness,known as 475 ℃ brittleness.The characteristics and causes of 475 ℃ brittleness are analyzed.The 475 ℃ brittleness of several typical stainless steel mate-rials is introduced,and the influence of heat treatment temperature on their impact toughness and corrosion resistance is investigated.In addition,stainless steel parts are prone to stress corrosion cracking and fail-ure after being brittle at 475 ℃.
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