美国紧固件头部 强度等级 中文说明.doc

Production Mark of ASME FastenerSAE、ASTM、IFI、ASME association standard and American National Standard draw up fastener different mechanical and property grade, and made of fastener of regular part of low carbon steel, whole middle carob stell and alloy steel at the same time. Especially for the high strength bolt and nut, must impress under mark is strength grade and maker or seller. This is inThe Unit State Fastener act regular that enter America market fastner must have mark of the mark, and this is mandatory implementation. The mark including in fastener mechanical and property grade( or material and hot treatment) and maker mark. Property grade mark generally use maths, symbol or lettering, maker mark use symbol and lettering. 美国SAE、ASTM、IFI、ASME协会标准和ANSI美国国家标准都制定了紧固件不同的机械性能等级，同时标准规定了部份低碳钢、所有的中碳钢和合金钢制造的紧固件，特别对高强度螺栓及螺母，必须在产品上制出强度等级和制造者或经销者的识别标志。这在美国紧固件法案中规定，凡进入美国市场的紧固件必须有标识标志，这是强制性执行的。标志内容包括紧固件机械性能等级(或材料、热处理)和制造者识别标志。性能等级的标志一般用数字、符号或字母来表示，制造者识别标志一般用字母和符号来表示。Property grade and maker mark lettering and code name use embossed sign of the head top of the bolt and screw, studs at the end of a side with gravure sign, Nut genera; in supporting the plane with the gravure sign. For the slotted and cross drive machine screw etc products, the standard regular do not make the mark sign. For the commodity fastener that size equal or less than 1/4 or M5 because of the head so small that the standard regular do not mark sign.性能等级和制造者标志符号、代号通常在螺栓、螺钉的六角头顶部用凸印标志，螺柱在末端一侧用凹印标志，螺母一般在支承平面上用凹印标志。对开槽和十字槽机器螺钉等产品，标准规定可不制出标志。对商品紧固件，等于小于1/4或M5的规格，因其头部较小，标准规定不打标志。For the buyer identification mark is best promise of the products quantity traceability. Only depend on unaided eye discerning mark of the strength especially and the adjust on fastener applicability. Only depend on mark fastener maker discerning logo and will provide of buyer traceability. Under the assembly line, when the user find the nonstandard fastener will as a hybrid products in isolation or carefully demotion use. And as well as middle carbon steel or alloy steel bolt demotion as low grade use. For the non mark fastener will be known as from have not reputation manufacturing it.对买方来说识别标志是产品质量可追塑性的最好保证。仅凭肉眼识别的强度特性的标志，就可判定紧固件的适用性，仅凭标明的紧固件制造者识别标志，就给使用者提供了可追踪性。在装配线上，使用者一旦发现无标志的紧固件就会当作混杂品进行隔离，或谨慎地降级使用，也就是说中碳钢或合金钢螺栓降为低等级使用，对没有生产者标志的紧固件就会被认为是没有信誉的企业生产的。When using find below quantity fastener, and according to mark held assemble from manufacturing and supplier and warn of the miniaturing and supplier must have responsibly of manufacturing or supply fit for the standard good products , mark have some binding of the manufacturing and supplier.在使用时，一旦发现不合格的紧固件，就可凭标志追究生产、供应者的责任。同时也告示生产、供应者要有责任生产或提供符合标准的合格产品，标志对生产、供应者起到一定约束作用。1) In the American Standard SAE J 429 outdoor fastener machine and property and material requirement the grade use maths mark from 1 to 8.2. The maths with strength grade have not quality correspond relation, but the maths bigger symbol of strength grade hinger, under the integer after decimal symbol strength grade same situation, only material or hot treatment style have some different. Head top mark style in the SAE standard use symbol.1).美国SAEJ 429外螺纹紧固件机械性能和材料要求标准中，性能等级用从18.2的数字表示。这些数字与强度性能没有数量上对应的关系，但数字越大表示强度等级越高，整数后面的小数表示在强度性能相同的情况下，仅材料或热处理方法有所区别。头部的标志方式在SAE标准中用符号表示。2).美国ASTM标准中的等级标志用数字和安母来标记，有的ASTM标准叙述了二种或二种以上的类型和等级，有的仅是材料上的差异，如ASTM A 325中有1型、3型；有的则是同样材料但要求的性能不一样，如ASTM A307中的A级、B级和C级。也有的用数字、字母和符号符号同时标注，如ASTM A490用数字和符号同时标记。表26 美国外 螺 纹 紧 固 件 强 度 等 级 标 志Grade MarkStandard No.Material TSHardnessNmm2minmaxSAE J4271MCS/LCS413.00B70B100SAE J4272509.80B80B100ASTM A307A级LCS413.00B69B100ASTM A307B级412699B69B95ASTM A307C级LCS A36399551B69B95SAE J4275级ASTM A4491型 MCS hot treatment826.00C25C19C34C30ASTM A 4491型723.aaHB183HB235SAE J4275.1级LCS or MCS Hot treatment826.00C25C40SAE J4275.2级低碳马氏体钢热处理826.00C26C36ASTM A4492型 C25C34ASTM A3251型中碳钢热处理826.00723.00C24C19C35C31ASTM A3253型耐腐蚀钢热处理826.00723.00C24C19C35C31ASTM A354-BC级中碳合金钢热处理861.25792.35C29C22C36C33SAE J4298级中碳合金钢热处理1033.00C33C39ASTM-A354BD级1033.00964.60C33C31C39C39SAE J4298.2级低碳马氏体钢热处理1330.00C33C39ASTM A4901型 中碳合金钢热处理1033.001171.30C33C38ASTM A4903型 耐腐蚀钢热处理1033.001171.30C33C38 3)在美国螺母强度等级体系标准中，ASTM A563标准包括了8个不同的等级，其中O级、A级和B级不需要打标志，其它所有等级必须打标志。C级和C3级在产品的顶面上有3条间隔相等的圆弧标志，D级、DH级和DH3级的标志是使用相同的等级的字母和数字标志，其中C3和DH3级的标志中数字“3”，以表示该螺母是用耐大气腐蚀钢制造的。螺母支承面的标志必需打凹印，同时打上生产者识别标志。 在美国SAEJ 995标准中包括了3个等级，其中2级螺母可不打标志，5级和8级螺母用不同的间隔圆弧线或时钟法标志。 在美国ASTM A194/A194M标准中,如2级和2H级螺母必须同时制出性能等级和生产者的标志。表27 美国内螺纹紧固件强度等级标志 等 级 标 志标 准 编 号材 料保证裁荷Nmm硬 度minmaxASTM-A563-0级低碳钢47540B55C32ASTM-A563-A级62000B68C32ASTM-A563-B级82680B69C32ASTM-A563-C级碳 钢热处理99217B78C38ASTM-A563-C3级低碳钢或中碳钢热处理99217B78C38ASTM-A563-D级碳 钢热处理103350B84C38ASTM-A563-DH级中碳钢120575C24C38ASTM-A563-DH3级耐腐蚀钢热处理1205