Welding of Metals

welding of cast iron
welding of aluminum
welding of titanium

Steel - an alloy of iron with carbon to which to give specific properties can be added alloying elements.

Carbon steel carbon content can be divided into the following groups:

• low-carbon steel - carbon content of less than 0.25%;
• medium steel - carbon content of 0.26-0.45%;
• high-carbon steel - carbon content exceeds 0.45%.

Alloy steels based on the total content of alloying elements are divided into:

• low-alloy steel - the amount of alloying elements is less than 5%;
• srednelegirovannye steel - the amount of alloying elements is 5-10%;
• high-alloy steel - the amount of alloying elements is more than 10%.

Often, the characteristics of alloy steels account for two features of classification - the content of alloying elements and carbon, such as low alloy mild steel.

With increasing amounts of carbon and alloying elements of the weldability of steel, as a rule, degraded and welding technology becomes more complex. This is explained by the fact that increases the sensitivity of steel to thermal cycle of welding, reduced ductility of the weld metal and heat affected zone, increasing stress and strain.

All were on their weldability are divided into three groups: well-welded, welded satisfactorily and poorly welded. It is well known as welded steel, which ensures uniform strength of the weld and base metal without the use of special techniques. To satisfactorily welded steels are those for which the strength balance is ensured by using special techniques, such as preheating, followed by heat treatment, the precision of thermal cycles, etc. are welded to the bad steel, which achieve equal strength of the seam and the base metal is not possible.

Good welded steels are low carbon, low alloy low-carbon, and some brands of high-alloy steel, welded satisfactorily - of medium, low-alloy media neuglerodistye, srednelegirovannye, high-alloy. By ill-welded high-carbon steels and some are brand srednelegirovannyh steels.

See also:
Cutting technology
Welding technology