ASTM D4812-1999 塑料的无凹口悬臂梁抗冲击强度的标准试验方法

标准号：ASTM D4812-1999
中文标准名称：塑料的无凹口悬臂梁抗冲击强度的标准试验方法
英文标准名称：Standard Test Method for Unnotched Cantilever Beam Impact Strength of Plastics
标准类型：G31
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G31
国际标准分类号：83.140.99 (Other rubber and plastic products)
适用范围： 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).