Cold Heading Quality Steel Wire Rod
Grade
ML08Al / ML35 / ML40Cr / ML20MnTiB
Applied standard
GB/T6478----2001 ˇ°Steel Wire Rod for Cold Heading and Cold Extrusionˇ±
Remarks : The mechannical properties are not tested for hot rolled ML35, ML40Cr, and ML20MnTiB, which may be stipluatedby both sides on request of the buyer .
Properties
ML08AL is low carbon and sillicon aluminum-killed steel ,featuring good ductibity and cold heading properties .
ML35 below(diameter 16mm)
To meet the demand of the users, the Rockwell hardness of the wire rod is lowered to a reasonable scope through the optimization of production process ; while in the non-an-nealing production of hexagon cap bolt , the toolings consumption is more and noise is bigger .
ML20MnTiBhas good cold heading properties and excellent mechanical proprties ,as can ensure proper surface hardness and low cost .
Application
(A)ML08Al can be used for the manufactuer of various tools and standard parts of such as flange nut , hexagon nut , round nut ,inner and external pipe connection ,double T iron ,hexagon cap nut , cross recess bolt ,bicycle axle bumper ,K cap ,box wrench , sleeve , connectors , connection rod, T iron , rivet, and so on .The application is as board as form aviation astronomy to daily living , such as bicycle , camera , clock and home application .
(B)ML35 is maily used for the manufacture of high strengh hexagon cap bolt , cylinder cap hexagon socket bolt ,motorcycle oil outlet bolt , 5789 socket bolt , hexagon flange bolt , tud bolt ,and various standard parts etc.
(C)ML40Cr is mainly used for manufacture of cylinder nut of class 10.9 ,cylinder bolt ,stud bolt etc . as well as suction valve and exhaust value for the engine of tractor and farm truck .
(D)ML20MnTiB is mainly used for the manufacture of high strengh bolt and connection pair for steel structure of class 10.9 .
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