紧固件耐腐蚀不锈钢紧固件的机械性能第2部分:规定等级和性能等级的螺母

[中文适用范围]： 本文件规定了由耐腐蚀不锈钢制成的粗牙螺纹和细牙螺纹螺母在 10 °C 至 35 °C 环境温度范围内测试时的机械和物理性能。 它规定了与螺母用奥氏体、马氏体、铁素体和双相（奥氏体-铁素体）钢种相关的性能等级。 他们的财产。 符合本文件要求的螺母是在第 1 段规定的环境温度下进行评估的。 它们可能在升高和/或降低的温度下不保留规定的机械和物理性能。 注1：符合本文件要求的紧固件在–20°C至+150°C的应用范围内不受限制地使用；然而，符合本文件的紧固件也可用于低于 –196 °C 和 +300 °C 范围之外的应用。 有关更多详细信息，请参阅 ISO 3506-6。 在 –20 °C 至 +150 °C 的温度范围之外，用户有责任咨询经验丰富的紧固件冶金学家并考虑不锈钢成分、持续时间等因素，确定特定应用的适当选择高温或低温的暴露，温度对紧固件机械性能和夹紧零件的影响，以及螺栓连接的腐蚀使用环境。 注 2 ISO 3506-53) 的制定是为了帮助选择适合在高达 +800 °C 温度下使用的不锈钢牌号和性能等级。 本文件适用于螺母： ——具有符合 ISO 68-1 的 ISO 公制螺纹， — 具有符合 ISO 261 和 ISO 262 的直径/螺距组合， — 具有粗牙螺纹 M5 至 M39 和细牙螺纹 M8×1符合 M39×3， — 螺纹公差符合 ISO 965-1 和 ISO 965-2， — 具有指定的性能等级，包括验证载荷， — 具有不同的螺母类型：薄螺母、普通螺母和高螺母， — 具有最小螺母高度 m ≥ 0.45D， — 最小外径或对边宽度 s ≥ 1.45D（见附录 A）， — 任何形状，并且 — 能够与性能等级为 100 的螺栓、螺钉和螺柱配合符合 ISO 3506-1。 3）准备中。  不锈钢牌号和性能等级可用于超出本文件直径限制的尺寸（即 D < 5 毫米或 D > 39 毫米），前提是满足所有适用的化学、机械和物理要求。 本文件没有规定功能特性的要求，例如： ——扭矩/夹紧力特性， — 现行扭矩特性，或 — 可焊性。 [外文原描述]： This document specifies the mechanical and physical properties of nuts, with coarse pitch thread and fine pitch thread, made of corrosion-resistant stainless steels, when tested at the ambient temperature range of 10 °C to 35 °C. It specifies property classes in relation to austenitic, martensitic, ferritic and duplex (austenitic-ferritic) steel grades for nuts. ISO 3506‑6 provides general rules and additional technical information on suitable stainless steels and their properties. Nuts conforming to the requirements of this document are evaluated at the ambient temperature specified in paragraph 1. It is possible that they do not retain the specified mechanical and physical properties at elevated and/or lower temperatures. NOTE 1 Fasteners conforming to the requirements of this document are used without restriction in applications ranging from ?20 °C to +150 °C; however, fasteners conforming to this document are also used for applications outside this range down to ?196 °C and up to +300 °C. For more details, see ISO 3506-6. Outside the temperature range of ?20 °C to +150 °C, it is the responsibility of the user to determine the appropriate choice for a given application, in consultation with an experienced fastener metallurgist and by taking into account e.g. stainless steel composition, duration of exposure at elevated or low temperature, the effect of the temperature on the fastener mechanical properties and clamped parts, and the corrosive service environment of the bolted joint. NOTE 2 ISO 3506‑5 [1] is developed in order to assist in the selection of appropriate stainless steel grades and property classes intended for use at temperatures up to +800 °C. This document applies to nuts: — with ISO metric thread in accordance with ISO 68‑1, — with diameter/pitch combinations in accordance with ISO 261 and ISO 262, — with coarse pitch thread M5 to M39, and fine pitch thread M8×1 to M39×3, — with thread tolerances in accordance with ISO 965‑1 and ISO 965‑2, — with specified property classes, including proof load, — with different nut styles: thin nuts, regular nuts and high nuts, — with a minimum nut height m ≥ 0,45 D , — with a minimum outside diameter or width across flats s ≥ 1,45 D (see Annex A), — of any shape, and — able to mate with bolts, screws and studs with property classes in accordance with ISO 3506‑1. Stainless steel grades and property classes can be used for sizes outside the diameter limits of this document (i.e. for D < 5 mm or D > 39 mm), provided that all applicable chemical, mechanical and physical requirements are met. This document does not specify requirements for functional properties such as: — torque/clamp force properties, — prevailing torque properties, or — weldability. [1] Under preparation.