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For automotive use ductile iron to SAE J434c grade D5506 is used where cast cranks are specified.

Franzh Thanks for the useful tip Yes it is an external flat cirlip though as I said above it is shaped like a loaf of bread in crossection. Has anyone heard of circlips mounted with the convex surface out detaching themselves from an engine part while in service?

The circlip is used to hold a starter motor pinion. The pinion is lightly loaded against the circlip via a spring. The concern is that if the convex face of the circlip is against the circlip groove shoulder and the flat face against the pinion that repeated starts could cause the circlip to...

The way a rectangular circlip is made they look like a loaf of bread in cross section, with one surface containing defined sharp edges and the other appearing convex. Is there a rule of thumb that states the circlip surface forced against the circlip groove and subjected to the most load, must...

Try this web site http://www.metalinfo.com/ or contact DIN standards

I remember some time ago a study was done to determine which cyclic corrosion test produced results closest to that found on vehicles driven for several years in the field. At the time the GM 9540P test was considered the optimum test. Although I cannot find any data to back this claim there...

Aluminium coated mild steel (ACMS) is used for motor car exhaust heat shields on vehicles that have limited exposure to road salt. Low grade ferritic stainless steel or aluminised stainless steel on applications subjected to a more severe environment. Aluminium or aluminium alloy could soften...

Jos42 Do you have the correct spelling? It is possible the coating you mean is Duracoat or Durocoat.

OzDave If you are corresponding from Australia I suggest you contact Bluescope Steel who are the suppliers of steel sheet in Oz. They can be contacted at www.bluescopesteelconnect.com Regards GD

From my memory the HSLA steels we use (solid solution hardening types) do not alter in properties significantly as evidence from a hardness plot conducted across a sectioned portion of weld bead. High strength dual phase and TRIP steels though may behave differently.

At our company, we have a standard listing of recommended torque for steel to steel, zinc plate steel and friction modified steel fasteners but nothing on bimetal combination fastener systems. I have been asked to determine the grade of steel bolt required to assemble a plastic part with...

If there is danger of forming a kink in the cable due to contact with the sharp edge then the cable inner will fail by fatigue. We have experienced such failures in clutch release cables and speedo cables in the past with consequent part breakdown.

If weight is not a problem then go back to old fathfull-flake graphite cast iron. It has the one of the best damping capacities of all modern automotive materials.

The major variables in performing an induction hardening operation are power settings and time spent within the hardening coils. Assuming your part is rotating as it is drawn through the coils a likely reason for "spatter" formation would be if the part is offset to one side such that...

Not sure about BM's but current sub frames, suspension arms and chassis rails are made from either hot rolled or cold rolled high strength low alloy steels sheet or coil. In addition, such steels can be galvanneal or galvanised pre-coated for corrosion resistance. Regards

According to published info formaldehyde is no problem with copper but hydrogen peroxide above concentrations of 10% can cause corrosion.

I have a material change to approve from aluminium alloy A3003 to A3103. I have data on the chemical analysis and mechanical properties of A3003 but not A3103. Can anyone out there assist with a reference or actual data. It is a German alloy which is not listed in Matweb or the specifications...

In addition, the higher strength graphite contains a predominantly pealitic matrix which imparts a degree of wear resistance and strength. It is normal practice to restrict the amount of ferrite in the microstructure to ensure the good wear resistance. This is achieved by adding carbide...

Carburize and Arunmao I know where you are coming from in your comments regarding hardness testing and indentor size applied to cast iron. Unfortunately the Japanese still measure ferrous castings with a Vickers Hardness tester and quote Vickers Hardness requirements in their specifications...

The hot dip process used to form a galvanised and subsequent galvanneal coatings are subject to errors in coating weight. We can purchase both locally (not USA) and from Japan galvanneal to a guaranteed coating weight of 45gm/m2 minimum so I am sure it would be available in the USA too. Try...