标准摘要
[中文适用范围]： 范围 本国际标准规定了用于确定和分类可重新连接或永久液压管接头的疲劳强度的弯矩试验程序。该程序适用于测试各种合金（如耐腐蚀钢、Nimonic™、钛和铝合金）制造的高强度液压管件，用于商业和军用飞机。 [外文原描述]： ISO 7257:2016 specifies a flexure test procedure to determine and classify the fatigue strengths of reconnectable or permanent hydraulic tube joints. The procedure is intended for conducting flexure tests of fittings and joints with high-strength hydraulic tubes of various alloys such as corrosion resistant steel, Nimonic?[1], titanium and aluminium alloy hydraulic tube for use on commercial and military aircraft. A mean stress is applied by holding system pressure in the specimens and then flexing in a rotary bending test machine. [1] Nimonic? is the trademark of a product supplied by Special Metals Corporation. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of the product named. Equivalent products can be used if they can be shown to lead to the same results.
英文名称Aircraft — Hydraulic tubing joints and fittings — Rotary flexure test