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Recent content by GraySyracuse

  1. GraySyracuse

    Aluminum cast alloy A203

    Folks, Do you have any problems (cracking issues) with A203 aluminum alloy after heat treatment? I try different cooling cycles but either is cracking (hot water), or does not meet the mech. properties (air). Also I have recommendation to use Helium or Argon (too expensive, but it works). Any...
  2. GraySyracuse

    Corrosion of Aluminum and Brass in a waterhater

    RC, Thank you for your fast response. You are right; those are not "really" boilers, there are water heaters, using natural gas. I do not know what pressure could build into them. I'll try to contact the customer to give me more info. Regards, CC
  3. GraySyracuse

    Corrosion of Aluminum and Brass in a waterhater

    Folks, I have a question from one of my customers. They are building commercial/residential boilers and are interested if it is any possibility of reaction between brass and aluminum alloys or stainless steel, brass and aluminum alloys. The boiler body is made of aluminum and he wants to use...
  4. GraySyracuse

    Guidelines to choose a superalloy ????

    If you need some help on alloy selection, I recommend "ASM - Metals Reference Book". What do you need to know about superalloys?
  5. GraySyracuse

    Welding 8620 (ASTM A732 Grade 13Q) investment casting

    I recommend heat treatment after welding: Normalize and Temper (see ASTM A487 - 9. Repaire by welding, para 9.3). It works more like a stress releve. (You may have cracking problems if you do not do it.)I am doing as a general rule: Normalize: 1600°F ± 25°F, one hour per inch of maximum section...
  6. GraySyracuse

    Metal analyzers

    I am using an INNOV-X (see innov-xsystem.com, president Don Sackett; ph: 781-938-5005), which is a portable XRF, with the size of the cordless drill gun. It is good for carbon steel, SS, Ni-base, Co-base, not for Al. The other company is NITON, which has 2 models: XRF and izotope. (niton.com...
  7. GraySyracuse

    Is AWS D17.1 -2001 replacing AMS-STD-1595

    Is AWS D17.1 -2001 replacing AMS - STD - 1595 (MIL - STD 1595) or is just an addition/duplication of requirements for the aerospace part manufacturers? I haven't seen anywhere any notes ( in the body of the spec) where this spec supersedes any other specs; (speaking with different welding...
  8. GraySyracuse

    17-4 PH and % austenite

    I am trying to find a correlation between the % of austenite in 17-4 ph to mechanical properties (research). I have seen lots of articles that is better to have such and such, but no data. Theoretically, I know that, but is it anywhere, or anybody has any info about this correlation? One of my...
  9. GraySyracuse

    17-4 PH and % austenite

    Thank you for your fast response. I would like to find study/data regarding the direct correlation between the %austenite and mechanical properties. I know the chemical composition control is an important factor in the ferrite-austenite-martensite %, but based on this I can correlate with the...
  10. GraySyracuse

    17-4 PH and % austenite

    I need a little help to find data regarding the % austenite in 17-4PH and mechanical properties. Any recommendations are appreciated.(books, articles, etc.)
  11. GraySyracuse

    AWS D17.1:2001

    Question: Can I qualify a welder for casting weld repair from Carbon and Alloy steel, in accordance with AWS D17.1:2001 (or former AMS/MIL-STD1595) using 8620 Heat Treatable Alloy Steel instead of any steels from group IB table 4.2 (or in AMS 1595 para 10.2 in the Appendix, page 61 Base metal...
  12. GraySyracuse

    BS 3146 Part1 CLA 11

    BS 3146 Part 1 CLA 11 covers castings with 3% Cr-Mo nitriding steel (alloy similar BS 970 - 722M24.) Analysis C 0.20/0.30 Si 0.3/0.8 Mn 0.3/0.6 S & P 0.035 max Cr 2.9/3.5 Mo 0.4/0.7 Ni 0.4 max Cu .3 max V .02 max Sn .03 max Mech prop (min) TEN. STRENGTH 924 N/MM2 YIELD STRESS 780 N/MM2 ELONG...
  13. GraySyracuse

    BS 3146 Part1 CLA 11

    Any recommended cast materials (Ni or Co base) to use for the oilfield drilling (turbodrilling motors) with similar properties to BS3146 Part 1 CLA 11 (nitriding steel)?
  14. GraySyracuse

    Turbodrilling motors

    Any recommended cast materials (Ni or Co base) to use for the oilfield drilling (turbodrilling motors) with similar properties to BS3146 Part 1 CLA 11 (nitriding steel)?
  15. GraySyracuse

    BS 3146 and equivalences

    Thank you. Any hints about castability (investment), heat treatment? Any cross-reference with ASTM/AMS/AISI steels? I appreciate the help. CC
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