Grain size Statistical grain diameter in a random cross section. Austenite grain size is reported as the number of former austenite grains within a standardized area. Hardness is inversely proportional to the temperature and duration of the annealing process. Heat Number A number assigned to a particular melt of material for identification and product traceability. Hydrostatic testing A nondestructive test procedure used to check a length of tubing for holes, cracks, and porosity.
Tubing is filled with water at a high pressure for a specified period of time to check for leaks.
Line Marking Information printed with an inert ink on the outside diameter of a tube. Data includes, but is not limited to, ASTM spec number, material heat number, tubing size, wall thickness and manufacturer name. Ensures full product traceability. Mechanical properties Characteristics of a material in response to externally applied forces. Modulus of Elasticity Stress per unit strain, measured in psi.