本标准遵照1969年7月2日制定、1970年6月26日开始实施的关于计量单位的法令,抗拉强度及σ_(0.2)极值采用N/mm~2做单位,棒料缺口冲击强度采用J做单位。用这些单位是有效的。本文中由一个点(·)来表示的条款,表示该条款要在订货时同制造商协商确定。1.范围1.1 本标准适用于表1所列的非合金和低合金钢。这些钢是以圆截面的棒料或盘条供货的。例如依照DIN766标准,可制造 This standard complies with Decree of July 2, 1969, promulgated on June 26, 1970 on the unit of measurement, the tensile strength and σ_ (0.2) the extreme use of N / mm ~ 2 units, notched impact strength Using J as a unit. Use these units is valid. The terms indicated by a dot (.) In this document indicate that the terms are to be agreed with the manufacturer at the time of order. 1. Scope 1.1 This standard applies to the non-alloy and low-alloy steel listed in Table 1. These steels are supplied as round bars or rods. For example, according to DIN766 standard, can be manufactured