Stainless steel lock point, hexagonal support adjustment rivet - High-end door and window building hardware component

Below is a detailed explanation of material selection logic, material advantages and key avoidance points for the four core scenarios:

I. Humid / Highly Corrosive Environments (Bathroom, Kitchen, Coastal Areas)

• 304 stainless steel has a high content of chromium and nickel, which can form a dense oxide film to effectively resist moisture and general acid-base corrosion, suitable for ordinary humid environments.
• 316 stainless steel adds molybdenum on the basis of 304, with better salt spray resistance and strong acid/alkali resistance, suitable for coastal high-salt spray areas and bathrooms frequently exposed to cleaners.
• H59 brass features high density and good ductility; its surface can be further improved in corrosion resistance via electroplating. It also has excellent thermal conductivity and decorativeness, suitable for functional and aesthetic parts such as bathroom faucets and kitchen hardware.

• 201 stainless steel has low chromium and nickel content and poor oxidation resistance. It rusts easily in humid environments, with surface peeling and corrosion spots appearing in a short time, failing to meet long-term use requirements.
• Zinc alloy itself has weak corrosion resistance and is prone to oxidation and embrittlement under moisture erosion. Especially in high-humidity and highly corrosive environments, it ages and breaks quickly, posing potential safety hazards.

II. Load-Bearing Structural Parts (Door & Window Hinges, Corner Codes, Curtain Wall Connectors)

• Cold-rolled steel features dense texture and high strength after cold rolling. After multi-layer electroplating (e.g., galvanizing + chrome plating), its corrosion resistance is effectively improved, suitable for most indoor and outdoor load-bearing scenarios with outstanding cost performance.
• 304 stainless steel not only has high strength but also excellent anti-corrosion and anti-rust properties. It can meet load-bearing demands in outdoor or humid environments without complex surface treatment, suitable for highly durable parts like curtain wall connectors and heavy-duty door & window hinges.

• Strength ≥ 8.8 (for bolt-type load-bearing parts) to ensure no deformation or fracture under rated load.
• Thickness ≥ 2.5 mm to enhance structural rigidity, reduce fatigue deformation under long-term loading, prolong service life, and avoid structural loosening or falling off due to insufficient thickness.

III. Lightweight / Decorative Parts (Door & Window Pulleys, Handles, Ceiling Decorations)

• Aluminum alloy has low density and light weight, with good ductility and wear resistance. Its surface can be treated by anodizing, spraying and other processes to present various colors and textures, suitable for lightweight and aesthetic parts such as door & window pulleys and ceiling decorations.
• Zinc alloy has a low melting point and good castability, allowing complex shaping. It features strong decorativeness after surface electroplating, suitable for non-load-bearing parts like door & window handles and small decorative accessories, with high cost performance to meet aesthetic needs while controlling costs.

IV. Outdoor / General Engineering Parts (Bolts, Anchors, Steel Wire Meshes)

• Hot-dip galvanized steel forms a dense zinc layer on the surface through hot-dip galvanizing, effectively resisting outdoor wind, rain and salt spray corrosion. It has a low cost, suitable for large-volume and cost-sensitive general engineering parts (e.g., bolts, steel wire meshes).
• 304 stainless steel has better weather resistance and corrosion resistance, suitable for high-demand outdoor scenarios (e.g., coastal engineering, high-temperature and high-humidity area engineering). Although its cost is higher than hot-dip galvanized steel, it reduces later maintenance costs and extends engineering service life.

• Prioritize hot-dip galvanized steel for ordinary outdoor scenarios to balance cost and durability.
• Use 304 stainless steel for highly corrosive and high-demand scenarios to avoid engineering maintenance caused by material corrosion in later stages.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.

Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include Siemens, bo-sch, Foxconn, Panasonic Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.