紧固件.耐腐蚀不锈钢紧固件的机械性能.第5部分:高温用特殊紧固件（也包括镍合金紧固件）

[中文适用范围]： 本文件规定了由耐腐蚀不锈钢（即马氏体不锈钢和沉淀硬化奥氏体不锈钢）和镍合金制成的螺栓、螺钉、螺柱和螺母的粗螺距和细螺距螺纹的机械和物理性能，用于高达 800°C 的高温。根据第 9 条的测试是在 10°C 至 35°C 的环境温度范围内进行的，其他测试可以在更高温度下进行，见第 10 条。注意：本文件中规定的紧固件也适用于低温，通常低至 -50°C。有关更多信息，请参阅 ISO 3506-6。当螺栓、螺钉、螺柱和螺母一起考虑时，本文件使用术语“紧固件”。镍合金及其性能。本文件适用于以下紧固件： — 符合 ISO 68-1 的 ISO 公制螺纹， — 符合 ISO 261 和 ISO 262 的直径/螺距组合， — 粗牙螺纹 M3 至 M39 和细牙螺纹 M8×1 至 M39×3， — 螺纹公差符合 ISO 965-1 和 ISO 965-2，以及 — 任何形状，但具有满负载能力。 不锈钢和镍合金紧固件符号可用于本文件直径限制以外的尺寸（即，d < 3 毫米或 d > 39 毫米的螺栓、螺钉和螺柱以及 D < 5 毫米或 D > 39 毫米的螺母），前提是满足所有适用的化学、机械和物理要求。本文件不涉及承载能力较低的紧固件（即薄螺母和螺栓、头部或无螺纹杆部比螺纹杆部弱的螺钉和螺柱）。本文件未指定功能特性的要求，例如： — 扭矩/夹紧力特性， — 剪切强度， — 抗疲劳性， — 可焊性， 1 或 — 高温环境下螺栓连接和紧固件的特性（参见第 10 条中紧固件的高温试验方法）。 [外文原描述]： This document specifies the mechanical and physical properties of bolts, screws, studs and nuts, with coarse pitch thread and fine pitch thread, made of corrosion-resistant stainless steels (i.e. martensitic stainless steels and precipitation hardening austenitic stainless steels) and nickel alloys, intended for use at high temperatures up to 800 °C. Tests in accordance with Clause 9 are performed at the ambient temperature range of 10 °C to 35 °C, and other tests can be performed at higher temperatures, see Clause 10. NOTE Fasteners specified in this document are also suitable when used at low temperatures, typically down to -50 °C. For more information, see ISO 3506-6. The term “fasteners” is used in this document when bolts, screws, studs and nuts are considered all together. ISO 3506-6 provides general rules and additional technical information on suitable stainless steels and nickel alloys as well as their properties. This document applies to fasteners: — 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 M3 to M39, and fine pitch thread M8×1 to M39×3, — with thread tolerances in accordance with ISO 965-1 and ISO 965-2, and — of any shape but with full loadability. Stainless steel and nickel alloy fastener symbols can be used for sizes outside the diameter limits of this document (i.e. for bolts, screws and studs with d < 3 mm or d > 39 mm and for nuts with D < 5 mm or D > 39 mm), provided that all applicable chemical, mechanical and physical requirements are met. Fasteners with reduced loadability (i.e. thin nuts and bolts, screws and studs with head or unthreaded shank weaker than the threaded shank) are not dealt with in this document. This document does not specify requirements for functional properties such as: — torque/clamp force properties, — shear strength, — fatigue resistance, — weldability, or — properties of bolted joints and fasteners in high temperature environment (see test methods at high temperature for fasteners in Clause 10).