一、概述目前,国内所使用的万能材料试验机(包括拉、压力试验机,以下均简称试验机)大都是以公斤力(kgf)为计量单位的。因此,GB228-76中规定:金属拉力试验的应力σ单位为/公斤力/毫米~2(kgf/mm~2),现在,根据我国国务院1984年2月27日发布的《关于在我国统一实行法定计量单位的命令》,确定以国际单位制(SI)为基础的我国法定计量单位中,对于力和应力这两个 I. Overview At present, the universal material testing machines (including pull and pressure testing machines, the following are simply referred to as testing machine) used in China are mostly based on kilogram force (kgf). Therefore, the provisions of GB228-76: metal tensile stress test unit σ / kg / mm ~ 2 (kgf / mm ~ 2), and now, according to China’s State Department February 27, 1984 issued “on the implementation of the unified Statutory units of measurement order ”to determine the basis of the International System of Units (SI) in our country’s legal units of measurement, for both the force and stress