ISO 3506-2:2020 紧固件 耐腐蚀不锈钢紧固件的机械性能 第2部分：具有指定等级和属性等级的螺母

标准编号：ISO 3506-2:2020

中文名称：紧固件 耐腐蚀不锈钢紧固件的机械性能 第2部分：具有指定等级和属性等级的螺母

英文名称：Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners — Part 2: Nuts with specified grades and property classes

发布日期：2020-04

标准范围

本文件规定了由耐腐蚀不锈钢制成的粗螺距螺纹和细螺距螺纹螺母在10°C至35°C的环境温度范围内进行测试时的机械和物理性能。它规定了与螺母的奥氏体、马氏体、铁素体和双相（奥氏体-铁素体）钢种相关的性能等级。ISO 3506？图6提供了关于合适的不锈钢及其性能的一般规则和附加技术信息。符合本文件要求的螺母在第1段规定的环境温度下进行评估。在高温和/或低温下，它们可能不保持规定的机械和物理性能。注1:符合本文件要求的紧固件不受限制地用于以下范围的应用？20℃至+150℃；然而，符合本文件的紧固件也用于此范围之外的应用，低至？196°C至+300°C。有关更多详细信息，请参见ISO 3506-6。在的温度范围之外？20°C至+150°C，用户有责任与有经验的紧固件冶金学家协商，并考虑例如不锈钢成分、暴露在高温或低温下的持续时间、温度对紧固件机械性能和夹紧部件的影响以及螺栓接头的腐蚀性使用环境，确定给定应用的适当选择。注2 ISO 3506？5[1]的开发是为了帮助选择在高达+800°C的温度下使用的适当不锈钢等级和性能等级。本文件适用于坚果:-采用符合ISO 68的ISO公制螺纹？1,-具有符合ISO 261和ISO 262的直径/节距组合，-具有粗螺距螺纹M5至M39和细螺距螺纹M8 × 1至M39 × 3，-螺纹公差符合ISO 965？1和ISO 965？2,-具有指定的属性类，包括证明负载，-具有不同的螺母样式:薄螺母，规则螺母和高螺母，-最小螺母高度m≥0.45 d，-平面的最小外径或宽度s≥1.45 D（见附件A），-任何形状，以及-能够与性能等级符合ISO 3506的螺栓、螺钉和螺柱配合？1.只要满足所有适用的化学、机械和物理要求，不锈钢等级和性能等级可用于本文件直径限制之外的尺寸（即D<5 mm或D>39 mm）。本文档未规定功能特性的要求，例如:-扭矩/夹紧力特性，-主要扭矩特性，或-可焊性。[1]正在准备中。

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 ≥ 0,45D,— with a minimum outside diameter or width across flats s ≥ 1,45D (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.

标准预览图