Old Material Mechanical Properties
Old Material Mechanical Properties
(OP)
Hi all,
I am searching for ASTM A-89 Grade B steel yield strength.
The pressure vessel was initially constructed with the 1943 UPV code and uses that material. I know the tensile strength and the allowable stresses at given temperatures from the 1943 code book but cannot find the yield strength. Also, I could not find
A-89 Gr. B in ASME sec. 2 part D.
Would anyone happen to know a rule of thumb to find the yield strength, or a formula that ASME provides.
Thank you all in advance,
eng741
I am searching for ASTM A-89 Grade B steel yield strength.
The pressure vessel was initially constructed with the 1943 UPV code and uses that material. I know the tensile strength and the allowable stresses at given temperatures from the 1943 code book but cannot find the yield strength. Also, I could not find
A-89 Gr. B in ASME sec. 2 part D.
Would anyone happen to know a rule of thumb to find the yield strength, or a formula that ASME provides.
Thank you all in advance,
eng741





RE: Old Material Mechanical Properties
These are very low strength alloys, right?
Some of these materials have very low yield strengths.
What were the allowed stress rules in '43? What fraction of UTS or Yield was used?
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P.E. Metallurgy, Plymouth Tube
RE: Old Material Mechanical Properties
Spec. minimum tensile = 50,000 PSI
maximum allowable working stress
-20 F to 650 F = 10,000 PSI
700 F = 9600 PSI
750 F = 9000 PSI
800 F = 7500 PSI
850 F = 6000 PSI
900 F = 4400 PSI
950 F = 2600 PSI
1000 F = 1350 PSI
1050 F = -----
The stress goes no further than 1000 F and I could not find anything to find/calculate the yield strength.
RE: Old Material Mechanical Properties
RE: Old Material Mechanical Properties
Out of curiosity how did you know the margin of yield is 1.5 times the allowable stress at the given temperature?
Is it a rule of thumb?
I am always interested in little tips that you provided so I can become more knowledgeable.
Thanks for all the help,
eng741
RE: Old Material Mechanical Properties
Regards
r6155
RE: Old Material Mechanical Properties
Thank you all again for the help,
eng741
RE: Old Material Mechanical Properties
RE: Old Material Mechanical Properties
RE: Old Material Mechanical Properties
eng741
RE: Old Material Mechanical Properties
RE: Old Material Mechanical Properties
https://law.resource.org/pub/us/cfr/ibr/002/asme.u...
-Christine
RE: Old Material Mechanical Properties
Also, the 1943 unfired pressure vessel link that Christine74 shared (thank you by the way) can you find more information on SA-89? Such as the yield strength, chemical composition, and what metal(s) can be welded to that material. If not where could I find that information.
Thank you in advance,
eng741
RE: Old Material Mechanical Properties
Those fractions have been various things over the years.
There are specs that have required UTS without a yield requirement.
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P.E. Metallurgy, Plymouth Tube
RE: Old Material Mechanical Properties
From ASME II 1940, Spec. S-2 is identical with ASTM A89-39. For the Firebox quality Grade B, chemical requirements are:
Carbon, max % (plates less than and equal to 3/4") 0.20 (plates over 3/4" thick) 0.22 Manganese, % 0.35 to 0.60 Phosphorous, max, % (acid) 0.04 (base) 0.035 Sulphur, max, % 0.04Tensile strength is 50,000 psi min, 65,000 psi max
Yield strength is 1/2 tensile strength but not less than 27,000 psi
RE: Old Material Mechanical Properties