美国紧固件头部强度等级中文说明.docVIP

Production Mark of ASME Fastener SAE、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