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  1. jaredhead

    Grey Cast iron ; general motors standard GM274M

    G275SP-1 is a Pearlitic Matrix Grey Iron with Minimum Tensile Strength of 275MPa. Hardness Range is 187 - 285 HB. Typical Composition: C 3.15 - 3.55 Si 2.15 - 2.55 Mn 0.50 - 0.60 Cu 0.25 max S 0.16 max P 0.10 max Cr 0.25 max Mo 0.40 - 0.60...
  2. jaredhead

    Grey Cast iron ; general motors standard GM274M

    GM274M is a standard which covers a range of grades, firstly general purpose grades where Minimum Tensile can range from 125MPa to 250MPa. Followed by special purpose grades for Disc Rotors, Pump Bodies, Bearing Caps, Piston Rings and Cylinder Liners. For the general pupose grades, the...
  3. jaredhead

    Pro-E Drive Configuration

    Can you please tell me, which is the better configuration for Pro-E. 4 drives - as 2 drives C: & D: mirrored. 4 drives - 1 large drive RAID 0/1 (striped & mirrored). 2 drives - 2 drives.
  4. jaredhead

    Flame Hardening of Cast Iron Shell-Core Coreboxes

    Does anyone have experience in flame hardening localised areas of coreboxes made of grey iron,used in the making of shell cores to extend the wear life? I am looking at alternative methods of extending our tool life.
  5. jaredhead

    Foundry Pattern Wear

    I am looking for alternative materials to use for patterns in our high pressure sand moulding foundry. We are currently using P20 Tool Steel, sometimes nitrided. With certain pattern geometries, the patterns will wear beyond the accepted dimensional tolerance before expected. What materials do...

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