If rebar steel is welded together as opposed to 'tied' does it decrease the strength of the steel?
Gary is right on! To add to it some rebar is heat treated if you weld it it loses the heat treating if you don't re heat treat it it will fail at the welded joint.
If done correctly it should increase the tensile strength at least.
The term tensile capability refers back to the quantity of tensile (stretching) tension a fabric can stand up to till now breaking or failing. the main suitable tensile capability of a fabric is calculated by technique of dividing the element of the fabric examined (the go section) by technique of the rigidity located on the fabric, regularly expressed in terms of pounds or plenty in step with sq. inch of fabric. Tensile capability is an significant degree of a fabric's means to accomplish in an utility, and the size is broadly used whilst describing the residences of metals and alloys.
The answer is it depends. I am not sure what steel alloy is used for rebar (there are hundreds of different steel alloys available commercially and different degrees of quality within any particular alloy and product form) but I assume it is a plain low carbon steel with a very simple heat treated condition. Welding does NOT increase the strength of steel, at least it does not in almost all cases (there are, of course, exceptions). A welded joint may be stronger than a tied joint but it depends on how the tied joint is tied and it depends on how the welded joint is welded. Crappy welds will not be as strong as well designed and executed tied joints. There are good reasons for different certifications for welders. With very little training and a little eye-hand coordination, anybody can learn to make farmer welds but sophisticated high quality welds in advanced steel alloys takes real skill, knowledge, and experience.
