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  1. Macdost

    Heat Treat Inquiry - 4130 Material - Sour Service - Yield @ 400°F >68,500? API6A

    Going to try a normalize, water quench, temper. Then going to try raising the austenitizing temp, temper. Then going to try a combination of the two. Everyone I have spoken to in real life (not online) has said the quenchent would not make a specific difference in my situation. mfgenggear -...
  2. Macdost

    Heat Treat Inquiry - 4130 Material - Sour Service - Yield @ 400°F >68,500? API6A

    4130 was the first choice, again sour service, there was discussion about using 4140. Do you think 4140 with similar heat treat as above; Water Quench – 1600°f - 5 hours, Temper – 1215°f - 6 hours, Hardness – 235 Bhn, will work?
  3. Macdost

    Heat Treat Inquiry - 4130 Material - Sour Service - Yield @ 400°F >68,500? API6A

    Water Quench – 1600°f - 5 hours Temper – 1215°f - 6 hours Hardness – 235 Bhn Results: Tensile – 400°F - 88,000 psi Yield – Request 70,000 400°F - 63,000 psi Elongation – 400°F - 23% Reduction of area – 400°F - 55% I need to get the yield up to >68,500 - any suggestions how? Thank you
  4. Macdost

    North American Equivalents to Euro Grades

    I have a database with NA equivalents to Euro grades, the following I cannot find, anyone have equivalents?: 10CrMOVNb9 22CrMoV12 21CrMoNiV4 I appreciate any assistance on this, thank you
  5. Macdost

    Heat Treat Inquiry - 4130 Material - Sour Service - Yield @ 400°F >68,500? API6A

    Hi, Forged part(s) ~220 lbs. each Material Grade - 4130 Sour service Yield needs to be >68,500 with testing done at 400°F At room temperature we hit ~75,000 yield for this. According to API 6A Appendix G, for 4130 you need to de-rate the material 88% for a testing temperature 400°F, which...
  6. Macdost

    ASTM A705, A564 Type 630 (17-4 PH) Severe Cracking After Heat Treat

    We changed ingot size from ~46" Round to ~26" square for forging of the subject line material. Forged the ingots down to H-20”, W-28”, L-21 ft, we made the switch to save time in forging (Open Die). This was the only major change in process After cooling to 90° we placed in furnace, ramped to...
  7. Macdost

    27 NiCRMoV 15-6 - Equivalent

    27 NiCrMoV 15-6 Y-760 Mpa T-900 Mpa Trying to find a NA equivalent, our history he closest I can find would be a 4330V MOD for the high Ni Anyone worked with this before and offered or determined an equivalent I can actually offer & get from supplier?
  8. Macdost

    Heat Treat Advice - Forgings - 4330V

    Thank you, just worried about the impacts and what hardness to aim for. I cannot find any history on this in our archives.
  9. Macdost

    Heat Treat Advice - Forgings - 4330V

    Hello, Forgings Part weight – ~200 lbs Material - 4330V per AMS 6427 Tensile – 130,000 min Yield – 109,000 min Impacts – 55 ft/lbs min @ RT Hardness – ? Looking for heat treat advice to meet mechanicals. Impacts and what hardness is what I have no history on. Thinking quench & temper should...
  10. Macdost

    NACE MR0175 & EN 10204

    Customer has specified that they want material 316ss for a forging and material must indicate NACE MR0175 and EN 10204 3.1b - Dimension ~27" Diam. x 7" thick Both of these are new for us. I have determined that there is no “NACE Test” that can be used to certify that a material meets MR0175...
  11. Macdost

    Aluminum Difference Between 2219-T62 & 2219-T6?

    Our Heat treater explained it as such "T6 for this alloy is aged @ 375 deg F 26hrs, T62 is 36hrs" For my purposes this is good enough,
  12. Macdost

    Aluminum Difference Between 2219-T62 & 2219-T6?

    We are forging. Customer requested a change from 2219-T62 to 2219-T6. What's the difference, if any. What should I look out for in process? Any heat treat information they look to be identical, I am not very experienced with Aluminum. Thank you
  13. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    Our Ingots are not re-melt VAR or VIM-VAR. Some of the parts have been milled prior to quench, did not have influence on mechanicals (same result as hot top or spout)
  14. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    We have looked at microstructure to a degree, more precise grain size. Old heat treat that was failing miserably ~2.5, new heat treat with good results 6.5-7.5. The good result as quenched hardness's have been 451-460. Of the three chemistries, do you see one that stands out as better for...
  15. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    Our best results had hardness of 321-341 Bhn Best result heat treat cycle; Normalize - 1775° - 16 hrs. @ temperature Brine quench to below 800° Quench – 1600° - 16 hrs @ temperature Brine Quench to below 250° (brine 45°) 1st temper 1100° 18 hrs. @...
  16. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    We need transverse -40f impacts @ 34J average no lower than 27J. "Others" are using same ingot as us. The ingot is large but we are getting the reduction as we are doing other grades of same size ingot 58" x 103" The finished block is saw cut from the drawn out forging. The blocks are ~43"l ...
  17. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    I do not know others grain sizing. Unfortunately determining grain size is a little like putting cart before horse. We obviously know that our best results with stated chemistry in my first post, has grain size 7.5. We are trying to determine how to move forward with new steel requisitioning...
  18. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    @redpicker et el. Referring back to my first post where I summarize the chemistry - I have learned that others forging this grade have different levels of Mn , Si, cr & Mo AND they are getting the mechanicals we have had difficulty achieving; Mn - Our Avg. 0.57 - others at (1)~0.265 & (2)0.80...
  19. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    We cut a piece off of the end of the block ~10" x 10" They are taken from the surface We do both longitudinal & transverse Ingot is 58" x 103" Forging is saw cut to ~22 x 27 it is from there that we take the samples
  20. Macdost

    4330 Modified (3.40 Ni) Charpy Results Failing - Need Heat Treat Advice

    @redpicker et el - Might you know when the carbide precipitation stops - at what temperature for the subject material?

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