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
|
|
