Stainless steel is widely familiar in daily life and is used to manufacture various corrosion-resistant equipment and tools. Stainless steel bolts are a typical representative, featuring oxidation resistance, corrosion resistance and wear resistance, with a broad range of applications.
1. Product Definition
Stainless steel bolts generally refer to fasteners capable of resisting corrosion from air, water, acids, alkalis, salts and other media. Depending on alloy composition, the acid resistance and rust resistance of the material vary in emphasis: some steels are rust-resistant but not necessarily acid-resistant, while acid-resistant steels generally also possess rust resistance. Austenitic stainless steel is the main material used for fastener production, and austenitic stainless steel is also what people commonly refer to as stainless steel in daily context. The raw materials of commonly used stainless steel fasteners are mainly austenitic grades 302, 304, 316, as well as low-nickel grade 201.
2. Product Categories
Stainless steel bolts and matching fasteners cover a wide variety of types. Common categories include: hex head bolts, socket head cap screws, hex socket set screws with concave point, hex socket set screws with flat point, hex socket set screws with cone point, hex socket set screws with dog point, countersunk socket head cap screws, oval socket head cap screws, Phillips pan head machine screws, Phillips countersunk head machine screws, Phillips raised pan head machine screws, Phillips pan head self-tapping screws, Phillips countersunk head self-tapping screws, Phillips raised pan head self-tapping screws, fully threaded rods (threaded studs), hex nuts, flange nuts, nylon insert lock nuts, acorn nuts, wing nuts, plain washers, spring washers, serrated lock washers, split pins, etc.
3. Material Selection Principles
Stainless steel material selection should consider the following five aspects comprehensively:
Requirements for mechanical properties of fasteners under working conditions, especially strength indicators;
Corrosion resistance requirements imposed by the service environment;
Heat resistance requirements imposed by operating temperature, including high-temperature strength and high-temperature oxidation resistance;
Processing performance requirements from production processes such as cold heading, cutting and forming;
Other factors including weight, procurement cost and supply channels.
4. Application Range
Stainless steel bolts are applicable to a wide range of fields, mainly including environmental protection equipment, medical equipment, communication equipment, power facilities, electronic products, food machinery, petrochemical industry, ship assembly, pumps, valves and pipelines, building curtain walls, outdoor exposed structures and other scenarios.
5. Product Features
Austenitic stainless steel bolts generally show no obvious magnetism or only weak magnetism under normal conditions, and magnetic permeability varies across different material grades. Stainless steel has good ductility, making it suitable for cold heading forming. Its mechanical properties remain stable, with excellent comprehensive performance of oxidation resistance, high-temperature resistance and corrosion resistance.
