標準號：ASTM D4812-1999
中文標準名稱：塑料的無凹口懸臂梁抗沖擊強度的標準試驗方法
英文標準名稱：Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G31
國際標準分類號：83.140.99 (Other rubber and plastic products)
適用范圍： Note 1-The machines with their pendulum-type hammers have been standardized in that they must comply with certain requirements, including a fixed height of hammer fall that results in a substantially fixed velocity of the hammer at the moment of impact. Hammers of different initial energies (produced by varying their effective weights) are recommended for use with specimens of different impact strengths. Moreover, manufacturers of the equipment are permitted to use different lengths and constructions of pendulums (with resulting possible differences in pendulum rigidities (see Section 4), and other differences in machine design).