1.1 ,This test method is used to determine the susceptibility of high-density polyethylene (HDPE) resins or corrugated pipe to slow-crack-growth under a constant ligament-stress in an accelerating environment. This test method is intended to apply only to HDPE of a limited melt index (<,0.4 to 0.15) and density range (>,0.947 to 0.955 g/cm³). This test method may be applicable for other materials, but data are not available for other materials at this time.