Home > About Us> Tech & Service

Alloy steel pipe & tube

The benefits of alloy steel pipe include its tensile strength, yield strength, fatigue resistance, toughness, and wear resistance.

Welding method of low carbon steel at a low temperature

Under the harsh winter conditions of low-carbon steel welding, due to the cooling speed of welded joint fastly make the crack tends to increase, especially in the first weld Heavy structures susceptible to cracking, for which the process must take the following measures:

  • preheat, welding process strictly maintain interpass temperature should not fall below the preheating temperature.
  • the use of ultra low hydrogen or hydrogen welding materials.
  • to increase the welding current when the tack welding, the welding speed slows down, due to increase tack-welded bead cross-sectional area and length, preheated if necessary.
  • the whole should be a continuous weld seam finish, avoid interruptions.
  • arc groove on the surface of the base material should not be beyond the need to fill the crater when extinction.
  • not possible under low temperature conditions, bending, straightening and assembly weldments.



English Inglés SpanishEspañol
Tech & service
Sunny Steel Blog
Recommended products
Pipe fittings
Pipe fittings are used to connect pipes.
Welded steel pipes Weld steel pipes
We produce an extensive selection of weld steel pipe
Welded steel pipes Anti corrosion pipe
Anti-corrosio pipe is processed through the preservation
Ceramic-Lined Pipes
from a single spool piece to complete piping systems.
Pipe flanges
Pipe flange are a method of connecting pipes, valves.
Pipe Fitting Accessories
We are passionate in Stub Ends, Bolt Sets, Fasteners


About Sunny Steel

Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

Link exchange