The performance of stainless steel nuts depends, first and foremost, on the selection of raw materials. Manufacturers must carefully select the optimal material from a variety of stainless steel grades based on the specific application environment. For instance, 304 stainless steel-characterized by its high chromium content (18%–20%)-exhibits excellent resistance to acid and alkali corrosion, making it suitable for use in humid or chemically active environments. Conversely, 316 stainless steel, which incorporates molybdenum, offers enhanced resistance to chloride-induced corrosion and is frequently utilized in marine engineering or environments with high salt-spray exposure. Furthermore, the carbon content within the material requires strict control; excessive carbon levels can compromise corrosion resistance, while insufficient levels may adversely affect hardness. Professional manufacturers employ spectroscopic analyzers to verify material composition, thereby ensuring that every batch of raw material meets the requisite standards.
Excellent Corrosion Resistance: Thanks to alloying elements such as chromium (Cr), nickel (Ni), and molybdenum (Mo), a dense oxide film forms on the surface, effectively resisting corrosion from oxygen, moisture, acids, alkalis, salts, and electrolytes.
Strength Grade Designation: Designated using markings such as "A2-70," where "A2" denotes austenitic stainless steel, and "70" indicates a minimum guaranteed tensile strength of 700 MPa.
Compliance with Standards: The current Chinese standard is GB/T 3098.15-2023, Mechanical Properties of Fasteners - Stainless Steel Nuts.
