外螺纹紧固件的机械和材料要求

[中文适用范围]： 该 SAE 标准涵盖了尺寸为 1-1/2 英寸（含）的英制系列钢螺栓、螺钉、螺柱、SEM 螺钉和 U 形螺栓的机械和材料要求。本文所指的术语“螺柱”适用于在一端或两端或在其整个长度上具有螺纹的中等长度的圆柱形杆。它不适用于带头、带凸缘或类似产品，这些产品的特征更符合本文所示的螺栓要求。表 1 中包含的机械性能是在大约 20 °C (68 °F) 的环境温度下编制的。这些属性在取决于材料的温度范围内有效 [外文原描述]： This SAE Standard covers the mechanical and material requirements for inch-series steel bolts, screws, studs, screws for sems 2x, and U-bolts 2x in sizes to 1-1/2 in. inclusive.The term “stud” as referred to herein applies to a cylindrical rod of moderate length threaded on either one or both ends or throughout its entire length. It does not apply to headed, collared, or similar products which are more closely characterized by requirements shown herein for bolts.The mechanical properties included in Table 1 were compiled at an ambient temperature of approximately 20 °C (68 °F). These properties are valid within a temperature range which depends upon the material grade used and thermal and mechanical processing. Other properties such as fatigue behavior, corrosion resistance, impact properties, etc., are beyond the scope of this document and responsibility for ensuring the acceptability of the product for applications where conditions warrant consideration of these other properties shall be borne by the end user.Cross Reference: ASME/B18.18,ASMEB18.2.1,ASTME18,ASTMF1470,ASTMF2328,ASTMF606,ASTMF788/F788M,J1268,J403_201406,J404,J409_202107,J411_201501,J417_201801,J995_201707