螺套材料
KATO无尾和有尾钢丝螺套广泛用于飞机应用，如发动机、齿轮箱、燃料系统、雷达、航空电子设备、飞行控制、照明和HVAC系统。它们还被军队和许多其他电子、机械和商业应用广泛使用。KATO无尾，无FOD设计是新紧固系统设计中最佳螺纹装配的首选标准。
新兴技术产生了新的螺套要求，引发了创新螺套材料的开发，以满足这些严格的需求，如更高的温度能力，减少摩擦，耐腐蚀，增加强度和其他要求。
以下螺套材料是专门为满足客户应用的苛刻要求而设计的：
304不锈钢
这是最受欢迎的螺套材料，它可以满足大多数应用对强度、耐腐蚀性和温度能力的要求。螺套可用于温度范围从-320°F到800°F的应用中。冷轧不锈钢丝被加工成钻石形状，使其抗拉强度超过200,000 PSI，硬度为Rc 43-50，表面光滑32微英寸。螺套在制造过程中发生的加工硬化使其具有轻微的磁性（大约2-10 G/O）。螺套材料由AS7245、NASM8846和合金号UNS S30400的规格涵盖。
铬镍铁合金X-750
提供这种材料的螺套用于更高的温度能力和可靠性应用。Inconel X-750螺套具有与304不锈钢螺套大致相同的强度和硬度特性，但可以在高达1000°F的环境中使用。该材料是一种镍铬合金，通过添加铝和钛使其可沉淀硬化。它在较高温度下具有良好的抗断裂性，良好的耐腐蚀性和抗氧化性，磁导率比304不锈钢螺套低（<1.0 G/O）。典型的应用包括燃气轮机、火箭发动机、核反应堆、压力容器和各种在较高温度环境下工作的飞机部件。螺套材料由规范AS7246涵盖。
磷青铜
由这种材料制成的螺套是盐水应用的理想选择，其耐腐蚀性优于304不锈钢和Inconel X-750，尽管它的强度不如这两种材料。它的抗拉强度约为140,000 PSI，硬度为HRB 95。磷青铜插件还可用于要求极低的磁导率（< 1.0 G/O）、低电连接性和导电性的应用，它们可以在高达572℉的环境中使用。典型的应用 包括海军舰艇、飞机仪表、造纸和纺织制造、汽车系统、采矿和钻探设备、泵和阀门以及电连接器。插件材料由规范AMS7247涵盖。
Nitronic 60
由Nitronic 60制成的螺套经过专门设计，在与不锈钢螺钉一起使用时可消除咬合和摩擦。由于在合金中添加了硅和锰，使配合的螺钉和Nitronic 60螺套之间的表面摩擦力优于304不锈钢螺套，从而减少了磨损和咬合，从而完全消除或最大限度地减少了微粒物质。螺套不需要额外的涂层或镀层，使其非常适合在真空中使用，因为没有废气，而且它们不受一些镀层和涂层的低温能力的限制，例如镉和干膜润滑剂。螺套无磁性（<1.0 G/O），具有良好的耐腐蚀性，抗拉强度约为200,000 PSI，硬度为Rc 43-50，可用于温度高达500° F。典型的应用包括半导体、航空航天工业，或当要求表明使用300系列不锈钢外螺纹紧固件时。该材料为金属合金号UNS S21800。
Nimonic 90®
仅供参考
由Nimonic 90制成的螺套可用于压力和热量极高的高温环境。它是一种镍铬钴合金，可沉淀硬化，在高温下具有高应力破裂强度。尼莫尼克90是应用于飞机部件和燃气轮机部件的理想材料，如喷气式发动机的排气喷嘴。尼莫尼克90的化学成分是Ni 54%，Cr 18-21%，Co 15-21%，Ti 2-3%，Al 1-2%。该材料由英国标准BS HR 503涵盖。
钛
仅供参考
钛合金制成的螺套具有比304不锈钢螺套更高的强度和重量比。它们还具有非常好的抗腐蚀能力，并且是无磁性的。钛合金螺套的抗拉强度（150,000至220,000 PSI）和硬度（Rc 35-43）略低，但比304不锈钢螺套的重量轻约45%，使其成为减轻重量的理想材料。钛非常稳定，其低热膨胀系数使其成为航空航天应用的最佳选择，如卫星必须经受从零度以下到600°F的温度波动（螺套应用的最高温度）。钛被用于生物医学领域；由于它与人体相容，它被广泛用于涉及生物植入物的应用。钛合金嵌件的材料规格为AMS 4957和AMS 4958A。
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