Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Shaw123

    Dark etch effect on 410

    I’ve experienced some dark etched areas on some 410SS billet during macro examination. The samples have also been micro examined. All etching was carried out using Kallings solution. The structure is tempered martensite but there is still the darker etched regions. I know martensite appears...
  2. Shaw123

    Adiabatic heating during hot working

    Hello, I’m interest in calculating/measuring the adiabatic heat generated when hot working metals (steels, Ni alloys and Ti alloys). The section sizes I’m interested in vary from 20mm to 300mm and forging temperatures can be 600C (1112F) to 1250C (2282F). I know that the surface of the material...
  3. Shaw123

    4340 too hard

    Thank you for you help. Section is 98 x 70mm. The material is forged from 2012F down to size in one heat and floor cooled. I’m not sure of the stop temperature but we always get to final size in one heat.
  4. Shaw123

    4340 too hard

    Dear all, 4340 steel I’m having difficulties achieving hardness properties from a hot press forged section. Forging from 1100C (2012F) with a greater the 4:1 reduction. Following forging I’m annealing at 650C (1202) for 13hrs and furnace cooling at 50C per hour. I need to achieve a hardness of...
  5. Shaw123

    718 ingot conversion

    Dear all, Regarding the forging conversion of 718 ingot material. I’ve been experiencing some problems with product that has been converted from ingot on an open dia press to 185mm dia and GFM to size ranging from 100-60mm dia of 718. A drop temperature is used around 1910F (1043C) for the...
  6. Shaw123

    Unknown steel - Finkle EX??

    Hi, Has anyone heard of a steel call Finkle EX? Maybe simular/ same as Hecla 167G?? Does anyone know the hardening temperature and tempering temperature required after an oil quench to achieve 350/380HB? Thanks
  7. Shaw123

    Calculations for heat transfer time

    Thanks for you help everyone!!! Corus, please could you what the symbols signify in your above equation? Cheers
  8. Shaw123

    Calculations for heat transfer time

    Dear all, I am looking for an equation to calculate the time take to heat certain sections of cylindrical steel. For example a solid piece of steel 300mm diameter (500mm long). If this piece was placed (from RT (20deg C)) into a charged furnace at 1200 deg C how long would it take for the...
  9. Shaw123

    Pyrowear Alloy 53- Grain refinement

    All parts were forged in one heat. Has anyone got any idea for a recovery treatment? Shaw123
  10. Shaw123

    Pyrowear Alloy 53- Grain refinement

    Thanks TVP, Billet grain size = ASTM 5-7 Forging grain size = ASTM 1-3 Desired grain size = ASTM 5 Forging temperature = 1120degC A heat treatment of 920 for 4.5hrs AC reduced grain size from ASTM 3.5 to 5.5. Shaw123
  11. Shaw123

    Pyrowear Alloy 53- Grain refinement

    Pyrowear Alloy 53 material. After forging grain coarsening occurred from the original billet. A grain refinement heat treatment was attempted which achieved an improvement of 2 ASTMs. This was still not enough. The heat treatment was 920deg C for 4.5 hours with an air cool. Should the time in...
  12. Shaw123

    AMS 6504

    Does anybody know its composition?
  13. Shaw123

    AMS 6504

    Hi all, Does anybody know a link to show me the following standard? AMS 6504
  14. Shaw123

    Sulphur effect on the tensile strength of ASTM A101

    Hi all, Does anyone know if the sulphur content of ASTM A101 would affect it's UTS in any way. The S range is 0.05% to 0.001%.
  15. Shaw123

    Hot Tensile Test of ASTM A182 (F51)

    Thank you metengr, Its good to know that my data is consistent with the literature. The worry I have is the elevated temperature UTS. I would normally be expecting 88 Ksi.
  16. Shaw123

    Hot Tensile Test of ASTM A182 (F51)

    RT : 75 KSI (.2% Yeild) RT : 103 KSI (UTS) Elevated temp: 54 KSI (.2% Yeild) Elevated temp: 86 KSI (UTS) Elevated temperature = 190 deg C
  17. Shaw123

    Hot Tensile Test of ASTM A182 (F51)

    Hi all, Does anyone know why there would be a dip in a high temperature (190 deg C) tensile test of an F51 stainless steel? The room temperature tensile test is as expected but the high temperature tensile test a lot is lower than expected. Any ideas?

Part and Inventory Search

Back
Top