大量提供的矩形铝管方管

Seamless square tubes will be seamless pipe extrusion molding and 13820468844 into. 1. The performance index analysis square tubes - plastic Plastic refers to the metal material in load, the plastic deformation (permanent deformation) without damage. 2 square tubes of performance index analysis - hardness Soft hardness is a pointer to the extent of metal materials. The current production of determination method is the most commonly used is the hardness of the hardness method, it is to use certain the geometry of the pressure head in certain load down into the surface of metal materials, testing according to the degree of hardness measurement its. Commonly used methods brinell hardness (HB), rockwell hardness (HRA, HRB HRC) and vickers hardness, etc.) (proposed.and 3 square tube performance index analysis - fatigue In front of the discussion, the plastic, the intensity of hardness metal is in the static load the mechanical properties of the pointer. In fact, many machine parts are in circulation, load conditions in this part will produce fatigue. 4 square tube performance index analysis - impact toughness With great speed on the load on parts called impact load, metal under impactloading ability to resist damage called impact toughness. 5 square tube performance index analysis - strength Strength is refers to the metal materials under static loading next resistance (excess plastic deformation or fracture) performance. Due to the effect of load mode is pulling, bending, cutting, so the intensity is divided into form of tensile strength, compressive strength, flexural strength and shear strength etc. Various intensity between the common use of more general on tensile strength as the most basic strength pointer.