M3 M4 Stainless steel Weld Stud Bolts with Nuts Washers SS304 SS316 A2 A4-80 Welded stud

M3 M4 Stainless steel Weld Stud Bolts with Nuts Washers SS304 SS316 A2 A4-80 Welded stud
 
Product Description:

Stud welding is the stud end and plate (or pipe fittings) surface contact, electric arc, to be melted on the contact surface, give the stud a certain pressure to complete the welding method. Arc stud welding with cylindrical head studs are suitable for high-rise steel structure buildings, industrial plant buildings, highways, railways, bridges, pylons, automobiles, energy, transport facilities buildings, airports, stations, power stations, pipeline supports, cranes and other steel structures.

Stud welding is a method of welding metal studs or other fasteners to a workpiece. There are various methods to achieve stud welding, such as: arc welding stud welding, energy storage stud welding, resistance welding, projection welding and so on. The corresponding welding machine is also different, respectively, for the arc stud welding machine, energy storage stud welding machine, resistance welding machine, convex welding machine. 

Stud welder in China has a variety of informal terminology, such as seed welder, plant welder, seed nail machine, plant nail machine, screw welder, screw welder, and so on, are referred to the stud welder.

Capacitor discharge stud welder adopts large capacity capacitor as the source of welding energy, and precisely controls the discharge time by SCR, which melts the tip of the stud quickly by instantaneous low voltage and strong current, and makes the stud and the working surface gap merge quickly, and welds the stud firmly on the working surface, and the whole process lasts about 1-10ms.

Applications

Compared with carbon steel, stainless steel fasteners have the characteristics of high temperature resistance and corrosion resistance, stainless steel is also more widely used in our life, what are the advantages of stainless steel in the end?

The first point, high temperature resistance

Stainless steel fasteners high temperature resistance: it is because the hardness of the stainless steel fasteners itself is strong enough, after the production and processing of fasteners have a strong anti-oxidation ability, and it is also able to work properly at high temperatures, so it will not be subjected to high temperatures too much interference. If the stainless steel fasteners can be used after manufacturing at the same time before passivation, then its effect will become better.

The second point, the rate of electric Yin

Stainless steel fasteners electro-negative rate: the physical properties of stainless steel fasteners have a high electro-negative rate, so and carbon steel wire compared to stainless steel fasteners than its electro-negative rate is five times higher. After testing, we concluded that there is a coefficient of expansion in the fastener, if the temperature is higher, then the expansion coefficient of stainless steel fasteners will gradually increase with the temperature.

The third point, force capacity

Stainless steel fasteners stress capacity: for stainless steel fasteners, its stress capacity to carry the load is medium, even if it can not be comparable with high strength bolts, but the stress capacity of stainless steel fasteners can also meet the daily needs of people.

The fourth point, mechanical properties

Mechanical properties of stainless steel fasteners: in the mechanical properties, most of us have learnt that many of the mechanical properties of fasteners have a great relationship with the stainless steel wire. For example: will not rust, high corrosion resistance, etc., these are with the nature of the stainless steel material itself has a great relationship, with the continuous development of fasteners, these mechanical properties have become stronger.

High corrosion resistance: 316 stainless steel contains molybdenum, which can show better corrosion resistance in chloride environment, so it is widely used in marine, chemical, pharmaceutical and other fields. Good high temperature resistance: 316 stainless steel high temperature strength and oxidation resistance are better than 304 stainless steel, can maintain stable performance in high temperature environment. Good mechanical properties: 316 stainless steel has high strength, plasticity and toughness, suitable for manufacturing high-strength mechanical structures. Suitable for welding: 316 stainless steel has good welding performance and can be processed by various welding methods. Disadvantages: higher price: due to the presence of molybdenum and other precious metal elements, 316 stainless steel price is relatively high. Processing difficulty: 316 stainless steel hardness is relatively high, processing is more difficult, need to use higher cutting force and cutting speed. Higher environmental requirements: 316 stainless steel in the manufacturing process requires the use of higher purity gas and water, requiring a clean and dust-free production environment.

 
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