The heat resistance temperature of stainless steel hydraulic fittings is not a fixed value, it is affected by a variety of factors, including the type of stainless steel (e.g. austenitic stainless steel, martensitic stainless steel, etc.), the composition and proportion of the material, the way of surface treatment, and the environment in which it is used (e.g. temperature, air pressure, oxygen content, etc.).

Generally speaking, the heat-resistant temperature of stainless steel is between 400℃ and 1300℃, depending on the type and grade of stainless steel. The following are the heat-resistant temperature ranges of some common stainless steel models:

304 stainless steel heat-resistant temperature:

this is one of the most commonly used stainless steels with good heat resistance, and its maximum service temperature is usually between 750℃ and 860℃. At a high temperature of 800℃, 304 stainless steel can still maintain good mechanical properties.

316 stainless steel heat-resistant temperature:

compared with 304 stainless steel, 316 stainless steel has better corrosion resistance and heat resistance, and its maximum operating temperature can reach 1300℃.

321 stainless steel heat-resistant temperature:

because it contains titanium and stabilizing elements, 321 stainless steel has good heat resistance, and its heat resistance temperature can reach 1000℃.

310S stainless steel heat-resistant temperature:

this is a kind of stainless steel with good heat resistance, its maximum use temperature reaches 1300 ℃, continuous use temperature can also reach 1150 ℃.

It should be noted that when the temperature of the stainless steel reaches a certain critical point, its properties may change, such as deformation or yield force changes. Therefore, in practical application, it is necessary to select the appropriate stainless steel material according to the specific conditions of use and environment, and strictly control its use temperature to ensure the stability and reliability of its performance.