What is a Bi-Metal Screw?

Bi-metal screw, an exceptional product of the advanced technique. The head and threads are made of stainless steel 304/316, providing perfect corrosion protection and ductility, The drill point is made of hardened carbon steel welded to the body. This combination allows the screws to deliver both superior corrosion resistance and exceptional structural strength.

What Metals Are Bi-metal Screws Made Of?

Bi-metal screws are manufactured by combining two different metals, each selected for its unique performance advantage.

• Stainless Steel: Forms the outer layer or screw head. It provides superior corrosion resistance, ensuring long-term durability even in harsh environments, and offers a clean, aesthetic surface finish.

• Alloy Steel: Used for the core or drilling tip, it delivers high strength, hardness, and excellent drilling performance, allowing the screw to easily penetrate hard materials such as structural steel.

Bi-Metal screw, acquires the advantages of both steel, therefore, optimizes the screw to its maximum usage. This combination makes bi-metal screws an ideal solution for applications that demand both strength and corrosion resistance, such as roofing, cladding, and steel structure construction.

How Do Bi-Metal Screws Enhance Corrosion Resistance and Durability?

Bi-metal screws are designed to combine the strengths of two different metals, resulting in outstanding corrosion resistance, mechanical strength, and long-term durability.

• Superior Corrosion Resistance:
  The stainless steel outer layer provides excellent protection  against rust and oxidation, even in harsh environments such as coastal regions, humid climates, or chemical plants. This ensures the screw  maintains its appearance and performance over time.

• High Strength and Durability:
  The alloy steel core delivers exceptional tensile strength  and shear resistance, allowing the screw to withstand heavy  loads and high-stress installations without deformation or breakage.

• Stable Structure and Long-Term Reliability:
  The precise metallurgical bonding between the two metals prevents galvanic  corrosion and ensures a solid, stable interface, maintaining   the integrity and safety of the fastening system throughout its service  life.

Tsingri Screw is an ISO9001 Certified and ETA approved Manufacturer, specializing in Australian Standard AS3566 Bimetal self-drilling screw and self-tapping screws. Available in different coating options such as Ruspert or Mechanical Zinc plating, providing superior anti-corrosion protection in both light and heavily weathered environments.

Fixing for steel to steel and steel to timber applications specifically in roofing and cladding. As a leader manufacturer of bimetal fasteners, our bimetal screw could be max length 350mm, Perfectly suitable for fixing various composite panels.