MaterialandperformancerequirementsformetricandGM6010M

customaryseriescasehardenedtappingscrews

公制及常规系列表面渗碳硬化自攻螺钉的材料和性能要求共8页第1页

1989

1.Scope.Thisstandardcoversmaterialsandperformancerequirementsapplicabletobothmetricand

customarysizesoftypesAB,B,BF,andBTandtocustomarysizesonlyoftypesAandBPcasehardened

carbonsteeltappingscrewsasusedintheautomotiveandrelatedindustries.Itisapplicablealsotosems

employingtherespectivetypesoftappingscrews.Thestandardemployingtherespectivetypesoftapping

screw.Thestandarddoesnotapplytocorrosionresistant(stainless)steelexceptfortappingscrews

fabricatedfromSAE51410which,whensuitablyprocessed,havebeenfoundtosatisfytheperformance

requirementsofthisspecification.

1.范围.该标准包含了公制和常规系列AB,B,BF,andBT型,及A,BP型表面渗碳钢自攻钉(用于汽车

及相关行业)的材料和性能要求.该标准同时也适用于各种自攻钉组合件,但不适用于防腐不锈钢(然

而,按SAE51410制造的自攻钉,在一定情况下,满足该标准的性能要求).

Note:similarspecificationspertainingtobothmetricandcustomarysizesoftypeBSDandBSSD

self-drillingtappingscrewsarecoveredinGM6172M.

注释:关于公制和自钻自攻螺栓常规系列BSD和SAE型的类似规范详见GM6172M..

Caution:casehardenedfastenersmaybesubjecttodelayedbrittlefracturecausedbyhydrogenresulting

fromcorrosion.Smallamountsofwatersuchasmightcondensefromhumidaircancausethistypeof

failure,particularlyinthepresenceofanodicsurfacecoatingssuchaszincorcadmiumplate.consequently,

itisrecommendedthatcasehardenedfastenersnotbeusedinstructuralapplications.

注释:由腐蚀造成的延迟氢脆可能影响紧固件表面硬化.湿气中的小量水分子也会造成该种失效,尤其

是镀锌或镉的阳极表面涂层.所以建议表面硬化紧固件不用于结构性应