There is no fastener made by any brass earthing accessories manufacturer that can suit every environment. It is vital to select the right fastener material from the variety of stuff available in the market. It is a daunting task and manufacturers need to consider the strength, corrosion, temperature, vibration, fatigue and other variables for constructing these pieces. But if you gain some basic knowledge and understanding about material, you can evaluate better.
Evaluation of material
# On the basis of mechanical properties
Most fastener manufacturers prepare the design to support or transmit some form of applied load (externally. If it is the matter of strength, there is no need to look beyond carbon steel. More than 90% of all fasteners are made by engineers with carbon steel. They consider the non-ferrous raw material only for special application.
Types of strengths –
- Tensile strength – the critical mechanical property linked to the standard threaded fasteners is tensile strength. Tensile strength is the maximum tension-applied load supported by a fastener prior to or coinciding with its fracture.
- Proof load – The proof load is the usable strength range for specific standard fasteners. It is an applied tensile load that must be supported by the fastener without permanent deformation. In simple words, the fastener returns to its original shape after unloading.
- Shear strength – Shear strength is referred to the maximum load that can be supported before the fracture, when applied to the axis of the fastener at a right angle. There are two types of shear- single shear and double shear. Single shear load occurs in one transverse plane, while double shear load applied in two planes where the fastener could be cut into pieces.
- Fatigue strength – You can expect repeated cyclic loads for fastener along with unexpected break, even if the loads are below the material strength. The fatigue strength is the maximum stress that can be withstand by a fastener for certain number of repeated cycles before breakdown.
- Torsional strength – It is a load expressed in terms of torque. At torsional strength load, the fastener fails by being twisted off about its axis.
Brass earthing accessories manufacturers analyze the mechanical properties along with other properties and decide the raw material to design fastener. You can avail the fasteners in brass, aluminum, steel, iron, copper, and for extraordinary applications, platinum, tungsten and zinc alloy material is used by manufacturers.