B16.9 ASTM A234 WP9 Buttweld Fittings SA234 WP9 CL1 Alloy Steel 45 Degree LR Elbow
ANSI B16.9 ASTM A234 WP9 CL1 Alloy Steel 45 DEG. LR Elbow Buttweld Pipe Fittings
Chemical Composition of ASTM A234 WP9 Buttweld Fittings SA234 WP9 CL1 Alloy Steel 45 Degree LR Elbow
|
Grade |
Composition, % |
||||||
|
C
|
Mn
|
P
|
S
|
Si
|
Cr
|
Mo
|
|
|
WP1
|
0.28 max
|
0.30-0.90
|
0.045
|
0.045
|
0.10-0.50
|
…
|
0.44-0.65
|
|
WP12 CL1, WP12 CL2 |
0.05-0.20
|
0.30-0.80
|
0.045
|
0.045
|
0.60 max
|
0.80-1.25
|
0.44-0.65
|
|
WP11 CL1,
|
0.05-0.15
|
0.30-0.60
|
0.030
|
0.030
|
0.50-1.00
|
1.00-1.50
|
0.44-0.65
|
|
WP11 CL2, WP11 CL3
|
0.05-0.20
|
0.30-0.80
|
0.040
|
0.040
|
0.50-1.00
|
1.00-1.50
|
0.44-0.65
|
|
WP22 CL1, WP22 CL3
|
0.05-0.15
|
0.30-0.60
|
0.040
|
0.040
|
0.50 max
|
1.90-2.60
|
0.87-1.13
|
|
WP5 CL1, WP5 CL3
|
0.15 max
|
0.30-0.60
|
0.040
|
0.030
|
0.50 max
|
4.0-6.0
|
0.44-0.65
|
|
WP9 CL1, WP9 CL3
|
0.15 max
|
0.30-0.60
|
0.030
|
0.030
|
1.00 max
|
8.0-10.0
|
0.90-1.10
|
|
WP91
|
0.08-0.12
|
0.30-0.60
|
0.020
|
0.010
|
0.20-0.50
|
8.0-9.5
|
0.85-1.05
|
|
WP911
|
0.09-0.13
|
0.30-0.60
|
0.020
|
0.010
|
0.10-0.50
|
8.5-9.5
|
0.90-1.10
|
Mechanical Properties of ASTM A234 WP9 Buttweld Fittings SA234 WP9 CL1 Alloy Steel 45 Degree LR Elbow
|
Grade
|
WPC, WP11 CL1, WP12 CL2
|
WP1
|
WP11 CL1, WP22 CL1, WP5 CL1, WP9 CL1
|
WP11 CL3, WP22 CL3, WP2 CL3, WP9 CL3
|
WP91
Type1 and 2
|
WP92
WP911
|
|
Tensile strength,
range Ksi [MPa]
|
70-95 [485-655]
|
55-80 [380-550]
|
60-85 [415-585] |
75-100 [520]
|
90 [620]
|
90-120 [620-840]
|
|
Yield strength, min, Ksi [MPa] (0.2% offset or 0.5% extension- under-load)
|
40 [275]
|
30 [205]
|
30 [205]
|
45 [310]
|
60 [415]
|
64 [450]
|
Specification
| Specifications | ASTM A234 / ASME SA234 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Size | 1/8” NB TO 48” NB. (Seamless & 100% X-Ray Welded, Fabricated) |
| Type | Seamless / Welded / Fabricated |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Thickness | Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
Ordering & Marking Information
When procuring this fitting, the complete description must include:
-
Standard (ASME B16.9)
-
Material (ASTM A234 / SA234 WP9 CL1/CL3)
-
Type (45° Elbow)
-
Radius (LR – Long Radius)
-
Nominal Pipe Size (e.g., NPS 6)
-
Schedule / Wall Thickness (e.g., Sch 80, Sch 160, or XXS)
Applications
Due to the WP9 alloy's ability to withstand prolonged exposure to high temperatures (up to ~600°C / 1100°F) and resist sulfidation and oxidizing atmospheres, this fitting is primarily used in:
-
Oil & Gas Refineries: Hydrocracking, catalytic reforming, and desulfurization units (high-pressure hydrogen service).
-
Thermal & Nuclear Power Plants: Superheater and reheater piping systems.
-
Chemical Processing: High-temperature heat exchangers and furnace tubes.
-
Sour Service: Where resistance to wet hydrogen sulfide (H₂S) cracking is required (when specified with appropriate hardness controls).
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