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ASTM A182
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 A193 B7
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A312 S31726

ASTM A182 


ASTM A182 - Forged or Rolled Alloy Steel Pipe Flanges, Forged Fittings and Valves, and Parts for High Temperature Service

Grade
Chemical Compositions  (max%)
C
Mn
P
S
Si
Cr
Mo
Ni
Ti
  F12 CL1
0.05-0.15
0.30-0.60
0.045
0.045
0.50
0.80-1.25
0.44-0.65
 
 
  F12 CL2
0.10-0.20
0.30-0.80
0.040
0.040
0.10-0.60
0.80-1.25
0.44-0.65
 
 
  F11 CL1
0.05-0.15
0.30-0.60
0.030
0.030
0.50-1.0
1.00-1.50
0.44-0.65
 
 
  F11 CL2
0.10-0.20
0.30-0.80
0.040
0.040
0.50-1.0
1.00-1.50
0.44-0.65
 
 
  F11 CL3
0.10-0.20
0.30-0.80
0.040
0.040
0.50-1.0
1.00-1.50
0.44-0.65
 
 
  F22 CL1
0.05-0.15
0.30-0.60
0.040
0.040
0.50
2.00-2.50
0.87-1.13
 
 
  F22 CL3
0.05-0.15
0.30-0.60
0.040
0.040
0.50
2.00-2.50
0.87-1.13
 
 
  F5
0.15
0.30-0.60
0.030
0.030
0.50
4.0-6.0
0.44-0.65
0.5
 
  F5a
0.25
0.6
0.040
0.030
0.50
4.0-6.0
0.44-0.65
0.5
 
  F321
0.08
2.0
0.045
0.030
1.0
≥17.0
 
9.00-12.0
5C%-0.70
  F304
0.08
2.0
0.045
0.030
1.0
18.0-20.0
 
8.00-11.0
 
  F304L
0.035
2.0
0.045
0.030
1.0
18.0-20.0
 
8.00-13.0
 
  F316
0.08
2.0
0.045
0.030
1.0
16.0-18.0
2.00-3.00
10.00-14.0
 
  F316L
0.035
2.0
0.045
0.030
1.0
16.0-18.0
2.00-3.00
10.00-15.0
 

Grade
Mechanical Properties (min)
Tensile (MPa)
Yield (MPa)
Elongation %
Reduction %
Hardness (HB)
F12 CL1
415
205
20
45
121-174
F12 CL2
485
275
20
30
143-207
F11 CL1
415
205
20
45
121-174
F11 CL2
485
275
20
30
143-207
F11 CL3
515
310
20
30
156-207
F22 CL1
415
205
20
35
170
F22 CL3
515
310
20
30
156-207
F5
485
275
20
35
143-217
F5a
620
450
22
50
187-248
F321
515
205
30
50
 
F304
515
205
30
50
 
F304L
485
170
30
50
 
F316
515
205
30
50
 
F316L
485
170
30
50
 


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