A4 Fasteners

A4 fasteners are made of stainless steel with the American designation AISI 316 / AISI 316 L and the Russian standard designation X 5 CrNiMo 18-10 / X 2 CrNiMo 18-10.

The A4 alloy contains 2-3% molybdenum, which significantly increases its resistance to corrosion and acid exposure, thereby expanding the range of applications for fastening devices. The material is classified as environmentally friendly, is completely non-magnetic, and retains all its technical characteristics for many years.

Where A4 fasteners are used

The main industry recommended for the use of A4 stainless steel fasteners is shipbuilding. These products are suitable for use in chlorine-containing environments and seawater, and are also used:

• in construction, in the manufacture of building products and structures, including facade structures;
• in machine building, oil and gas production, and chemical industries;
• for manufacturing instruments and automatic metering and control devices;
• in the food, medical, and pharmaceutical industries.

Stainless A4 fasteners are installed in any mechanisms and are also used to join parts operating under harsh conditions, where carbon steel hardware fails quickly.

Advantages of A4 steel fasteners

Thanks to the chromium, nickel, and, most importantly, molybdenum content in the stainless steel, A4 fasteners resist any aggressive environment and have a high tensile elongation limit.

Stainless fasteners of this group are easy to weld, require no special care or maintenance, are durable, resistant to corrosion, and environmentally friendly.