High-Quality M12 & M20 Brass-Plated Weld Stud Bolts with Nut and
Washer T1 T2 T3 for Durable Metal
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
Pure copper is a rose-red metal, the surface of the formation of
copper oxide film is purple, so the industrial pure copper is often
called copper or electrolytic copper. Density of 8-9g/cm3, melting
point 1083 ° C. Pure copper conductivity is very good, a large
number of wires, cables, brushes, etc.; good thermal conductivity,
often used to manufacture magnetic instruments, instruments, such
as compasses, aeronautical instrumentation, etc. to prevent
magnetic interference; plasticity is very good, easy to hot and
cold pressure processing, can be made into tubes, rods, wires,
strips, strips, panels, foils and other copper materials.
(T1, T2, T3), oxygen-free copper (oxygen-free copper, silver
oxygen-free copper, zirconium oxygen-free copper and diffuse
oxygen-free copper), phosphorus deoxygenated copper, add a small
amount of alloying elements of special copper (copper arsenic,
tellurium copper, silver copper, copper sulphur and zirconium
copper) four categories. Copper conductivity and thermal
conductivity second only to silver, widely used in the production
of electrical and thermal conductivity equipment. Copper in the
atmosphere, seawater and some non-oxidising acids (hydrochloric
acid, dilute sulfuric acid), alkalis, salt solutions and a variety
of organic acids (acetic acid, citric acid), has good corrosion
resistance, used in the chemical industry. In addition, copper has
good weldability, can be cold, thermoplastic processing into a
variety of semi-finished products and finished products. 1970s, the
production of copper exceeded the total output of other types of
copper alloys.
Theoretical value of pure copper resistivity If the various
materials made of 1 m long, cross-sectional area of 1 square
millimetre wire, at 20 ℃ to measure their resistance (known as the
resistivity of this material) and compare, the silver resistivity
is the smallest, followed by copper, aluminium, tungsten, iron,
manganese-copper, nickel-chromium alloys in the order of the
resistivity in order to increase.
The resistivity of aluminium wire is more than 1.5 times that of
copper wire, which has a resistivity of p=0.0294 Ωmm2/m, and that
of copper, which has a resistivity of p=0.01851 Ω-mm2/m, and the
resistivity varies somewhat with temperature
| No. | C% | Cr% | Ni % | Mo % |
| 304 | 0.07 | 17.5-19.5 | 8.0-10.5 | / |
| 316 | 0.08 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 |
| 301 | 0.15 | 16.0-18.1 | 6-8 | / |
| 310 | 0.08 | 24-26 | 19-22 | / |
| 304L | 0.03 | 18-20 | 8-12 | / |
| 316L | 0.03 | 16-18 | 10-14 | 2-3 |
| 321 | 0.08 | 17-19 | 9-12 | / |
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