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  • Users: gdodd
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  1. gdodd

    Circlip positioning

    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...
  2. gdodd

    Recommended Torque for Steel- Brass Combo

    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...
  3. gdodd

    Aluminium alloy ID

    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...
  4. gdodd

    Hardness Conversion Tables

    Is there anyone out there who can point me in the right direction to access Brinell to Vickers and Rockwell hardness conversion tables for grey or ductile cast iron. Maybe through the British Foundrymens Association or its American Equivalent. Thanks in Advance
  5. gdodd

    Electical circuit corrosion

    We have a problem with an automotive wiring harness which has a number of wires containing perforations in the insulation exposing the stranded copper wires. Two of the wires are active supplying current to two different appliances and one is an earth wire. In exceptional cases there is a...
  6. gdodd

    We have a problem with an automotiv

    We have a problem with an automotive wiring harness which has a number of wires containing perforations in the insulation exposing the stranded copper wires. Two of the wires are active supplying current to two different appliances and one is an earth wire. In exceptional cases there is a...
  7. gdodd

    Corrosion of electrical wiring

    I have a current carrying wire with insulation damage and thinning or partial damage to the copper strands and a corrosion product, identified as copper hydroxide deposited around the damage. If we apply an insulating medium such as lanolin or silicone spray to effectively cover the damaged...
  8. gdodd

    Stress relieving of aluminium die casting

    Is it possible by metallographic means, hardness or other simple test to determine whether a pressure die cast aluminium alloy has been stress relieved or not? The material is Japanese spec ADC12 (close to AA335). Stress relieving is done at 210 degrees C for 2 hours after die casting and...
  9. gdodd

    Ductile Iron Problem

    Ductile Iron Problem We have found a cast iron part containing areas of flake graphite but mostly compacted graphite and spheroidal graphite where normally it would be 100% spheroidal graphite in a ferrite matrix. Understandably the properties such as hardness and ductility have been reduced...
  10. gdodd

    Material Enquiry

    Can someone tell me the chemical analysis and mechanical properties of a steel tube material T45? I believe it is a Reynolds steel used for roll cages and maybe an English specification. Is there an equivalent ISO, ASTM or SAE spec? Thanks in Advance
  11. gdodd

    DIN standard information

    Could someone tell me the nominal chemical composition for DIN 1652 C 45 Pb K + N. Thanks in advance Gdodd

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