ASTM A 335  
 

 

 
 
ASTM A335 is a ASTM standard specifies Seamless Ferritic Alloy Steel Pipe for High-Temperature Service. ASTM A335 pipe ordered to this specification shall be suitable for bending and similar forming operations, and for fusion welding. Selection will depend upon design, service conditions, mechanical properties, and high-temperature characteristics.
 
     
  ASTM A335 P11 alloy pipe  
  ASTM A335 P11 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.  
     
  ASTM A335 P22 alloy pipe  
  ASTM A335 P22 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.  
     
  ASTM A335 P9 alloy pipe  
 
The range of ASTM A335 P9 seamless alloy steel pipe sizes that may be examined by each method shall be subjected to the limitations.
 
     
  ASTM A335 P91 alloy pipe  
  ASTM A335 P91 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.  
     
  ASTM A335 P92 alloy pipes  
  ASTM A335 P92 pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.  
     
  ASTM A213 T9 alloy pipes  
 
ASTM A213 T9 is the part of ASTM A213 Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, Heat-Exchanger Tubes.
 
     
 
Mainly Grade of ASTM A335:

ASTM A335 P11, P22, P5, P9, P91, P92

 
     
 
Chemical Composition (%) for the main grade
Grade
C
Mn
P, S, max
Si
Cr
Mo
P11
0.05-0.15
0.30-0.60
0.025
0.50-1.00
1.00-1.50
0.44-0.65
P22
0.05-0.15
0.30-0.60
0.025
0.50 max
1.90-2.60
0.87-1.13
P5
0.15 max
0.30-0.60
0.025
0.50 max
4.00-6.00
0.45-0.65
P9
0.15 max
0.30-0.60
0.025
0.25-1.00
8.00-10.00
0.90-1.10
P91
0.08-0.12
0.30-0.60
0.020/0.010
0.20-0.50
8.00-9.50
0.85-1.05
V 0.18-0.25
N 0.03-0.07
Ni 0.40 max
Al 0.02 max
Nb 0.06-0.10
Ti 0.01 max
P92
0.07-0.13
0.30-0.60
0.020/0.010
0.50 max
8.50-9.50
0.30-0.60
V 0.15-0.25
N 0.03-0.07
Ni 0.40 max
Al 0.02 max
Nb 0.04-0.09
W 1.50-2.00
B 0.001-0.006
Ti 0.01 max
Zr 0.01 max
 
     
     
 
Heat Treatment Requirements
Grade Heat Treatment Type
P5, P9, P11, and P22
Normalizing Temperature Range F [C] Subcritical Annealing or Tempering
Temperature Range F [C]
P5 (b,c) Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
Subcritical Anneal (P5c only) ***** 1325 – 1375 [715 - 745]
P9 Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
P11 Full or Isothermal Anneal
Normalize and Temper ***** 1200 [650]
P22 Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
P91 Normalize and Temper 1900-1975 [1040 - 1080] 1350-1470 [730 - 800]
Quench and Temper 1900-1975 [1040 - 1080] 1350-1470 [730 - 800]
 
     
     
   
   
     
     
   
     
     
 
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