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ASTM A53
ASTM A106
API 5L
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ASTM A350
ASTM A105
ASTM A694
ASTM A182
A350 LF2
ASTM A234
ASTM A420
ASTM A860
 A193 B7
A194 2H
A240 GR.410
A312 S31726

ASTM A234 

ASTM A234   Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature

Grade
Chemical Compositions (max% )
C
Mn
P
S
Si
Cr
Mo
Ni
Cu
V
WPB [Note1,2,3,4,5]
0.3
0.29-1.06
0.05
0.058
≥0.1
0.4
0.15
0.4
0.4
0.08
WPC [Note2,3,4,5]
0.35
0.29-1.06
0.05
0.058
≥0.1
0.4
0.15
0.4
0.4
0.08
WP1
0.28
0.3-0.9
0.045
0.045
0.1-0.5
...
0.44-0.65
...
...
..
WP12 CL1
0.05-0.2
0.3-0.8
0.045
0.045
0.6
  0.8-1.25
0.44-0.65
...
...
...
WP11 CL1
0.05-0.15
0.3-0.6
0.03
0.03
0.5-1.0
   1.0-1.5
0.44-0.65
...
...
...
WP11 CL2
0.05-0.20
0.3-0.8
0.04
0.04
0.5-1.0
   1.0-1.5
0.44-0.65
...
...
...
WP22 CL1
0.05-0.15
0.3-0.6
0.04
0.04
0.5
   1.9-2.6
0.87-1.13
...
...
...
WP5  CL1
0.15
0.3-0.6
0.04
0.03
0.5
   4.0-6.0
0.44-0.65
...
...
...
WP9  CL1
0.15
0.3-0.6
0.03
0.03
1
8.0-10.0
0.9-1.1
...
...
...
WPR
0.2
0.4-1.06
0.045
0.05
...
...
...
1.6-2.24
0.75-1.25
...
WP91
0.08-0.12
0.3-0.6
0.02
0.01
0.2-0.5
8.0-9.5
0.85-1.05
0.4
...
0.18-0.25
Others:    Cb:0.06-0.1 N:0.03-0.07  Al:0.02   Zr:0.01
WP911
0.09-0.13
0.3-0.6
0.02
0.01
0.1-0.5
8.0-9.5
0.9-1.0
0.4
...
0.18-0.25
Others:  Cb:0.06-0.1   N:0.04-0.09   Al:0.02   Zr.0.01  B:0.0003-0.006   W:0.9-1.1   Ti:0.01

Notes:
1) Fittings made from bar or plate may have 0.35 max carbon.
2) Fittings made from forgings may have 0.35 max carbon and 0.35 max silicon with no minimum.
3) For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted, up to a maximum of 1.35%.
4) The sum of Copper, Nikel, Chromium, and Molybdenum shall not exceed 1.00%.
5) The sum of Chromium and Molybdenum shall not exceed 0.32%.

Grade
Mechanical Properties (min)
Tensile (MPa)
Yield (MPa)
Elongation% 2in
Hardness (HB)
Longitudinal
transverse
WPB
415-655
240
30
20
≤197
WPC
485-655
275
30
20
≤197
WP1
380-550
205
30
20
≤197
WP12 CL1
415-585
220
30
20
≤197
WP11 CL1
415-585
205
30
20
≤197
WP11 CL2
485-655
275
30
20
≤197
WP22 CL1
415-585
205
30
20
≤197
WP5 CL1
415-585
205
30
20
≤217
WP9 CL1
415-585
205
30
20
≤217
WPR
435-605
315
28
...
≤217
WP91
585-760
415
...
...
≤248
WP911
620-840
440
...
...
≤248




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