弯曲双扩口消除应力,焊接冷拉高强度(690 MPa抗拉强度)低合金钢液压管路

[中文适用范围]： 本规范涵盖应力消除退火电阻焊和冷拔单壁高强度低合金钢管，用于液压管线和其他需要质量适合弯曲@扩口@冷成型@和钎焊的应用。按照本规范生产的材料等级为微合金含量。 ISO 10763 和 SAE J1065 中列出了该管材的标称参考工作压力 注意：亚临界退火钢通常使用低于给定钢的下临界温度 (AC1) 的退火温度生产，以达到所需的强度水平。焊接@钎焊@或其他使管材料或组件承受接近或高于AC1的温度的加工方法可能会引发管微观结构的等温转变，并通过进一步对管进行退火而损害热影响区中管的强度。因此@ ISO 10763 和SAE J1065 标称参考工作压力可能不适用。建议用户和制造商验证并同意管组件设计和压力额定值不会超出这些过程的系统设计。 SAE J2551-2 中描述的性能测试将有助于提出适当的测试建议。根据特定几何形状和与该材料相关的部件制成的钎焊和/或焊接管组件配置可能需要根据 ISO 19879 液压流体动力连接测试方法进行资格测试。冷成型管端连接代替钎焊和焊接等热工艺，避免了这种系统测试，不会损害管材料的结构完整性，努力在全球市场内实现标准化，并确保公司能够在国际市场上保持竞争力@ 转换为公制管尺寸的目的是： 形成一个全球系统 引导用户使用首选系统 降低复杂性 消除库存重复 [外文原描述]： This specification covers stress relieved annealed electric resistance welded and cold-drawn single-wall high strength low alloy steel tubing intended for use in hydraulic pressure lines and in other applications requiring tubing of a quality suitable for bending, flaring, cold forming, and brazing.The grade of material produced to this specification is of micro-alloy content. Nominal reference working pressures for this tubing are listed in ISO 10763 and SAE J1065.CAUTION: Sub-critically annealed steels are often produced using anneal temperatures below the Lower Critical Temperature (AC1) of the given steel to achieve the desired strength levels. Welding, brazing, or other processing methods that subject the tube material or assembly to temperatures near or above AC1 might initiate isothermal transformation of the tube microstructure and compromise the strength of the tube in the heat affected zone by further annealing the tube. Therefore, ISO 10763 and SAE J1065 nominal reference working pressures might not be applicable. It is recommended that the user and the fabricator validate and agree that the tube assembly design and pressure ratings are not compromised beyond system design from these processes. Performance testing as described in SAE J2551-2 will facilitate appropriate test recommendations.Brazed and/or welded tube assembly configurations made to specific geometry and components in association with this material may require qualification testing in accordance with ISO 19879 Test Methods for Hydraulic Fluid Power Connections. Cold forming the tube end connections in place of thermal processes such as brazing and welding avoids this systemic testing by not compromising the structural integrity of the tube material.In an effort to standardize within a global marketplace and ensure that companies can remain competitive in an international market, it is the intent to convert to metric tube sizes which will:Lead to one global systemGuide users to preferred systemReduce complexityEliminate inventory duplicationsCross Reference: ASTMA513,EN10305-2,EN10305-4,ISO10763,ISO19879,ISO3304,ISO3305,ISO4200,ISO4397,ISO4399,ISO5598,ISO6162,ISO6605,ISO8434,J1065_201605,J1392_201703,J1453,J1677_201612,J2467_201506,J2551_201309,J2614_201801,J409_202107,J514,J514_201201,J518,J518_201303,J525_201609,J533_201702