Bi-Metal Screws Applications
What are Bi-Metal Screws?
Traditional stainless steel screws offer rust resistance but lack the hardness required for direct drilling, while carbon steel screws drill easily but are prone to rust. Sheh Kai's Bi-Metal Screws perfectly combine the advantages of both:
- Head & Shank: Made from 300 Series Austenitic Stainless Steel (e.g., SUS304 / SUS316), providing superior corrosion resistance to ensure long-term durability in outdoor environments.
- Drill Point: Made from high-hardness alloy steel and subjected to precise high-frequency induction hardening, delivering exceptional drilling performance to penetrate steel plates directly.
Core Advantages
Modern buildings often require a lifespan of 30-50 years. Our screws feature a stainless steel body paired with Ruspert® coating technology, which combines metallic zinc and ceramic surface treatment to effectively resist salt spray, exhaust fumes, and acid rain.
- High Standards: Compliant with Australian AS 3566 Class 3 and Class 4 standards, passing 1,000 to 2,000 hours of salt spray testing.
No pre-drilling required! Bi-Metal screws combine "Drilling, Tapping, and Fastening" into a single step. This significantly reduces construction time and labor costs, allowing for easy penetration even into heavy-gauge steel plates.
With over 20 years of experience in dissimilar metal welding, we ensure a robust and durable fusion between the stainless steel and alloy steel components. This eliminates the risk of fracture and provides the most stable quality assurance in the industry.
Applications
Our composite screws are widely used in environments where safety and weather resistance are critical:
- Public Infrastructure: MRT systems, High-Speed Rail, and stadiums.
- Coastal & High-Corrosion Areas: Seaside buildings, chemical plants, and power stations.
- Energy Facilities: Solar panel mounting systems.
- Curtain Walls & Light Steel Frames: Rapid and secure structural connections.
Project Track Record
Sheh Kai's precision quality is trusted by major engineering projects both domestically and internationally. Our footprint includes major infrastructure across Taiwan:
- Taiwan High Speed Rail Platform
- Taipei Farglory Dome (Taipei Dome)
- Kaohsiung MRT System
- Formosa Petrochemical Corp. Mailiao Refinery
- National Kaohsiung Center for the Arts (Weiwuying)
