Key Benefits
Excellent corrosion resistance: stainless steel screws generate chromium oxide protective layer through the reaction of chromium element and oxygen, which can effectively resist corrosion of air, water, acid, alkali salt and other media, suitable for medical equipment, ship assembly, chemical equipment and construction and other scenes. Among them, 316 material is preferred for Marine environment due to its enhanced resistance to chloride corrosion.
Good physical and mechanical properties:
Temperature resistance: with high temperature and low temperature toughness, the yield strength of some duplex stainless steel can reach two times of ordinary stainless steel.
Insulation: high resistivity and low thermal conductivity, suitable for the occasion with special requirements for electrical and thermal conductivity.
Beautiful and durable: novel design, smooth surface, decorative, and long service life in normal environment.
Installation convenience: Compared with the traditional anchor, the stainless steel screw installation process is relatively simple, the drilling tilt fault tolerance rate is high, the installation success rate is close to 100%, and the performance can be guaranteed without complex maintenance.
Main Disadvantages
Relatively high cost: Stainless steel material prices are higher than ordinary carbon steel, resulting in higher initial procurement costs, but may be a more economical solution in the long term considering life cycle costs.
Rust can still occur under certain conditions:
Material factors: if low nickel stainless steel such as 201 is used as 304/316, or "poor chromium area" occurs in the production process, the rust prevention ability will be greatly reduced.
Environmental factors: In the chlorine ion (such as sea water, swimming pool), high temperature and high humidity or acid and alkali chemical contact in the harsh environment, passivation film may be damaged resulting in pitting corrosion or rust.
Mechanical property Limitations:
Strength and toughness: Compared with high-strength carbon steel, some stainless steel screws have low hardness, easy to break when extreme force or torque is too large, and there are differences in toughness performance.
Bite death risk: if the lock is not removed for a long time, cold welding between stainless steel threads is easy to occur, resulting in adhesion, increasing the difficulty of disassembly.
Risk of sliding teeth: when the force is too large or the material is not good, it is easy to slip teeth.
Purchase and use recommendations
Material selection: 304 material can be selected for ordinary environment, 316 material is recommended for coastal or strong corrosion environment, avoid using 201 material for outdoor or humid environment.
Standard installation: use stainless steel special tools, avoid direct contact with carbon steel, copper and other heterogeneous metals to prevent galvanic corrosion, clean up the surface welding slag or debris after installation.
Regular maintenance: clean up surface contaminants every 6-12 months, keep dry, find mild rust can be wiped with neutral detergent and do passivation treatment.
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