ISO 898-2:2022 紧固件 碳钢和合金钢制紧固件的机械性能 第2部分：具有规定性能等级的螺母

标准编号：ISO 898-2:2022

中文名称：紧固件 碳钢和合金钢制紧固件的机械性能 第2部分：具有规定性能等级的螺母

英文名称：Fasteners — Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with specified property classes

发布日期：2022-09

标准范围

本文件规定了由非合金钢或合金钢制成的螺母在环境温度范围10？℃至35℃？°C。本文件适用于坚果:—？带ISO公制螺纹（见ISO？68-1），—？直径/节距组合符合ISO？261和ISO？262,—？粗螺距螺纹M5~M39，细螺距螺纹M8 × 1~M39 × 3，—？螺纹公差符合ISO？965-1，ISO？965-2还是ISO？965-5,—？具有指定的性质等级04、05、5、6、8、10和12，包括证明载荷，—？三种不同的螺母样式（见5.1）:常规螺母（样式？1）、高螺母（样式？2）和薄螺母（样式？0），—？平面的最小外径或宽度？≥？1、45D、—？能够与性能等级符合ISO的螺栓、螺钉和螺柱配合？898-1（见附件？B），及—？旨在用于-50？°C到+150？°C，还是高达+300？°C。警告-符合本文件要求的螺母在环境温度范围10？℃至35℃？°C，应用范围从-50？°C到+150？°C；但是，这些螺母也在这个范围之外使用，最高可达+300？特定应用的°C。它们可能在较低和/或较高的温度下不保持规定的机械和物理性能。因此，用户有责任根据组件的使用环境条件确定适当的选择（另见7.1）。有关适用于热浸镀锌螺母的附加规范，请参见ISO？10684.对于为特定应用设计的螺母，请参见ISO/TR？16224.本文档未规定功能特性的要求，例如:—？主要扭矩特性（参见ISO？2320），—？扭矩/夹紧力特性（试验方法见ISO？16047），—？可焊性，或—？耐腐蚀性。

This document specifies the mechanical and physical properties of nuts made of non-alloy steel or alloy steel, when tested at the ambient temperature range of 10 °C to 35 °C.This document applies to nuts:—    with ISO metric thread (see ISO 68-1),—    with diameter/pitch combinations according to ISO 261 and ISO 262,—    with coarse pitch thread M5 to M39, and fine pitch thread M8×1 to M39×3,—    with thread tolerances according to ISO 965-1, ISO 965-2 or ISO 965-5,—    with specified property classes 04, 05, 5, 6, 8, 10 and 12 including proof load,—    of three different nut styles (see 5.1): regular nuts (style 1), high nuts (style 2) and thin nuts (style 0),—    with a minimum outside diameter or width across flats s ≥ 1,45D,—    able to mate with bolts, screws and studs with property classes in accordance with ISO 898-1 (see Annex B), and—    intended to be used in applications ranging from –50 °C to +150 °C, or up to +300 °C.WARNING — Nuts conforming to the requirements of this document are tested at the ambient temperature range of 10 °C to 35 °C and are used in applications ranging from –50 °C to +150 °C; however, these nuts are also used outside this range and up to +300 °C for specific applications. It is possible that they do not retain the specified mechanical and physical properties at lower and/or elevated temperatures. Therefore, it is the responsibility of the user to determine the appropriate choices based on the service environment conditions of the assembly (see also 7.1).For additional specifications applicable to hot dip galvanized nuts, see ISO 10684.For nuts designed for particular applications, see ISO/TR 16224.This document does not specify requirements for functional properties such as:—    prevailing torque properties (see ISO 2320),—    torque/clamp force properties (see ISO 16047 for test method),—    weldability, or—    corrosion resistance.

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