Strength material than ASTM A194 B16
Strength material than ASTM A194 B16
(OP)
I had to analyse an existing product that doesn't met the ASME code.The bolting section isn't enough 35 cm2 in spite of 38 cm2 required by the stress analysis (10 bolt B16 D1"). I can't increase the number of bolts nor the diameter. I can only change the material. ASTM A194 B16 has an allowable stress at room temperature of 25 ksi. It works also at 482°C and the stress analysis is ok. Do you know other bolting material having allowable stress higher that ASTM A194 B16 at room temperature and at 482°C commonly avalaible in commerce.
Regards,
Regards,





RE: Strength material than ASTM A194 B16
Please describe more about your application. Is this for pressure vessel design/flange bolting?
RE: Strength material than ASTM A194 B16
Yes It's for flange bolting of pressure vessel.
RE: Strength material than ASTM A194 B16
prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design
RE: Strength material than ASTM A194 B16
*SA-479 XM-19 with ASR of 26.2 ksi and 1150°F VIII-1 limit but not enough strength.
*(SA-437 B4B is slight equivalent to XM-19).
*SB-637 (Alloy 718) has a good ASR of 37.0 ksi 1150°F VIII-1 limit. I don't know if it's available in commerce and how the cost is.
RE: Strength material than ASTM A194 B16
What is the exact spec. of the Inconel 625 acco. to ASTM ?
Do you have experience whith such alloy.
I'm looking for SB-637 (Alloy 718) now. What do you think ?
RE: Strength material than ASTM A194 B16
It seems that the Alloy 718 is very hard to be machined.
With 625 alloy stress analysis is ok and it's avalaible in our supplier.
Are there any requirements for the bolting made from 625 ?
Had to be machined or rolled ? Any help !
RE: Strength material than ASTM A194 B16
I know that it had to be less strength that the stud.
Do someone have opinion ?
Thanks in advance
RE: Strength material than ASTM A194 B16
prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design
RE: Strength material than ASTM A194 B16