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what is mean by ASTM A 335 P11

06/22/2009 2:14 AM

dear sir,'

ASTM A 335 is an alloy steel i new it but what does P11,P91 signifies?

all the valuable replies will be appriciated.

thanks in advance
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XMech
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Join Date: Jan 2009
Location: Western Canada
Posts: 299
Good Answers: 52
#1

Re: what is mean by ASTM A 335 P11

06/22/2009 9:05 PM

ASTM A335 has numerous different grades within it (with chromium and molydbenum the most important alloying elements), specifically:

  • P11 = 1-1/4% Cr; 0.5% Mo (nominally)
  • P91 = 9% Cr; 1% Mo (nominally with many other small percentage elements especially Vanadium)
  • P1
  • P2
  • P5
  • P5b
  • P5c
  • P9
  • P12
  • P15
  • ....
  • ...
  • ..
  • .
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