zebmahar
Materials
- Dec 12, 2010
- 46
Hello Guys!
We are producing 10” x 11.7 x DRL Seamless pipe in API 5L Gr. X 60, with material composition as follow:-
C = 0.14 %, Si = 0.22 %, Mn = 1.33 %, P = 0.0012 %, S = 0.00062 %, Cr = 0.165 %, Ni = 0.143 %, Mo = 0.022 %, Al = 0.0241 %, Cu = 0.215 %, Co = 0.0107 %, Ti = 0.0016 %, V = 0.00034 %, W = 0.0071 %, Pb = 0.0010 %, Sn = 0.0109 %, Ca = 0.0010 %, Fe = 97.7 %, CE = 0.42%
I want to know, what is the procedure of reducing the yield to tensile ratio? In our case the ratio is 0.93 which is within the limits of API 5L Gr. X-60 but the customer has specified 0.87. We have changed the heat treatment parameters 2 to 3 times in the following range
Required: Yield = 415 – 565,Tensile = 520 – 760, Ratio = 0.87
Temp (C) Time(Mints)Yield Tensile Ratio
675 12 586 602 0.97
675 15 575 595 0.96
725 20 480 504 0.95
But the yield and tensile is reducing with the same proportion, hence the ratio is same. Please advise what we should do to reduce the ratio.
Kind Regards
Zebmahar
We are producing 10” x 11.7 x DRL Seamless pipe in API 5L Gr. X 60, with material composition as follow:-
C = 0.14 %, Si = 0.22 %, Mn = 1.33 %, P = 0.0012 %, S = 0.00062 %, Cr = 0.165 %, Ni = 0.143 %, Mo = 0.022 %, Al = 0.0241 %, Cu = 0.215 %, Co = 0.0107 %, Ti = 0.0016 %, V = 0.00034 %, W = 0.0071 %, Pb = 0.0010 %, Sn = 0.0109 %, Ca = 0.0010 %, Fe = 97.7 %, CE = 0.42%
I want to know, what is the procedure of reducing the yield to tensile ratio? In our case the ratio is 0.93 which is within the limits of API 5L Gr. X-60 but the customer has specified 0.87. We have changed the heat treatment parameters 2 to 3 times in the following range
Required: Yield = 415 – 565,Tensile = 520 – 760, Ratio = 0.87
Temp (C) Time(Mints)Yield Tensile Ratio
675 12 586 602 0.97
675 15 575 595 0.96
725 20 480 504 0.95
But the yield and tensile is reducing with the same proportion, hence the ratio is same. Please advise what we should do to reduce the ratio.
Kind Regards
Zebmahar
