Performance of stainless steel screws
The performance of stainless steel screws mainly includes tensile strength, yield strength, corrosion resistance, and mechanical properties.
Tensile strength and yield strength
The tensile strength and yield strength of stainless steel screws are important mechanical performance indicators. Common performance levels include A2-70, A2-80, A4-70, and A4-80. These grades represent the tensile strength of screws, for example, A2-70 indicates a tensile strength of 700N/mm ² for 304 stainless steel screws, while A4-80 indicates a tensile strength of 800N/mm ² for 316 stainless steel screws.
corrosion resistance
The corrosion resistance of stainless steel screws mainly depends on their chemical composition, especially the chromium content. Generally speaking, the higher the chromium content, the stronger the corrosion resistance. For example, 316 stainless steel contains more nickel and molybdenum, making it more corrosion-resistant than 304 stainless steel, especially in marine and industrial environments. In addition, 316L stainless steel bolts also exhibit good corrosion resistance in the production process of pulp and papermaking.
Mechanical properties
Different types of stainless steel screws have different mechanical properties. For example:
Austenitic steel: The tensile strength is 700-800MPa, the stress at a specified plastic elongation of 0.2% is 450-600MPa, and the elongation at break is 0.3d.
Martensitic steel: The tensile strength is 1100-1200MPa, the stress at a specified plastic elongation of 0.2% is 700-900MPa, and the elongation at break is 0.3d.
Ferritic steel: The tensile strength is 600-700MPa, the stress at a specified plastic elongation of 0.2% is 450-600MPa, and the elongation at break is 0.3d4.
Application scenarios
Stainless steel screws are widely used in applications that require high strength and corrosion resistance, such as marine engineering, chemical engineering, food processing, and other fields. Its excellent performance enables it to perform well in these environments and withstand long-term use under harsh conditions