(Heat Affected Zone) that portion of the base metal which has not been melted, but whose mechanical properties or microstructure has been altered by the heat of welding or cutting.

an alloy of carbon and iron containing a maximum of 2 % carbon, 1.65 % manganese, and residual quantities of other elements, except those intentionally added in specific quantities for de-oxidation (usually silicon and/or aluminum).

based alloy where any one or the sum of the specified amount of the following elements exceeds 50 %: titanium, nickel, cobalt, chromium, and molybdenum.

a pipe used in wells to seal off the borehole; ordinarily is considered a fixed or permanent installation. (See tubing.)

Weight Tear Test (DWTT) - a test designed to determine the fracture toughness of line pipe.

testing.html">tensile test, expressed as a percentage of the original length. (2) The increase in length of material fibers during bending.

the wall thickness for tubes.

a method or process of bending which utilizes an induction heating coil to create a narrow, circumferential, heated band around the material to be bent. When the appropriate temperature is reached the material is moved forward through the coil at a predetermined speed while a bending moment is applied. After the material passes through the coil it [..]

the lengthwise axis of the specimen that is parallel to the direction of the greatest extension of the steel during rolling or forging.

that portion of the pipe or tube that is neither in compression nor tension.