Superior Material Properties
The “304 stainless steel” designation refers to a widely used austenitic stainless steel alloy, renowned for its excellent corrosion resistance. Composed primarily of iron, chromium (18 - 20%), and nickel (8 - 10%), 304 stainless steel forms a passive oxide film on its surface. This film acts as a barrier, protecting the underlying metal from oxidation and chemical attack, making it highly resistant to rust and stains. Whether used in humid coastal environments, chemical plants, or food processing facilities, 304 stainless steel A2-70 screws maintain their integrity over extended periods, reducing the need for frequent replacements.
The “A2-70” marking indicates compliance with European standards for stainless steel fasteners. “A2” specifies the material grade as austenitic stainless steel (equivalent to 304 stainless steel), while “70” denotes the minimum tensile strength of 700 MPa. This classification ensures consistent quality and performance, giving manufacturers confidence in the screws' ability to withstand significant loads without failure.
Reliable Mechanical Performance
The 700 MPa minimum tensile strength of A2-70 screws provides robust fastening capabilities. These screws can securely join various materials, from lightweight plastics to heavy-duty metals, maintaining a firm grip even under dynamic forces and vibrations. Their yield strength, typically around 450 MPa, ensures that the screws deform minimally under stress, preserving the integrity of the assembly. This reliability is crucial in applications such as automotive manufacturing, where components must endure constant movement and mechanical stress.
Moreover, 304 stainless steel exhibits good ductility, allowing the screws to be formed into intricate shapes without cracking. This property facilitates the production of Phillips pan-head screws, which feature a distinctive cross-shaped recess designed to prevent the screwdriver from slipping during installation and removal. The combination of strength and ductility makes A2-70 Phillips pan-head screws suitable for both high-stress and precision applications.
User-Friendly Design
The Phillips pan-head design offers several practical advantages. The rounded, shallow head profile sits flush with the surface of the workpiece, minimizing snagging hazards and providing a clean, aesthetically pleasing finish. This makes them ideal for applications where appearance matters, such as furniture assembly, consumer electronics, and architectural installations.
The Phillips recess allows for efficient torque transmission, enabling quick and easy installation using standard Phillips-head screwdrivers or power tools. The cross-shaped slot reduces the likelihood of cam-out, a common issue with slotted screws where the screwdriver slips out of the slot, saving time and effort during assembly processes.
Versatility Across Applications
The combination of corrosion resistance, mechanical strength, and user-friendly design makes 304 stainless steel A2-70 Phillips pan-head screws suitable for a wide range of industries. In the marine sector, they withstand the harsh, salt-laden environment, securing components on boats and offshore structures. In the medical field, their biocompatibility and ease of sterilization make them suitable for use in medical devices and equipment. They are also extensively used in the construction industry for joining metal and wooden structures, and in the aerospace sector for assembling lightweight yet durable components.
In conclusion, 304 stainless steel A2-70 Phillips pan-head screws have earned their place as a staple in the fastener industry. Their superior material properties, reliable mechanical performance, user-friendly design, and versatility make them the go-to choice for countless applications, ensuring secure, long-lasting, and aesthetically pleasing assemblies.