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|
Comparison
of properties of ferritic steel tubes |
Specification |
2%Cr
Steel |
9%Cr-12%Cr
Steel |
T22,
P22 |
|
T91,
P91 |
T92,
P92
|
HCM12
|
|
SAVE12
|
Standard |
PED |
10CrMo910 |
－－ |
X10CrMoVNb91 |
－ |
VdTÜV510
HCM12 |
－ |
－ |
ASME |
SA213
T22,
SA335 P22
|
Sec.
I
Case 2199-1
|
SA213
T91,
SA335 P91 |
SA213
T92,
SA335 P92 |
－ |
Sec.
I
Case 2180-2 |
－ |
Chemical
composition |
2-1/4Cr-1Mo |
2-1/4Cr-1.6W
-Nb-V
|
9Cr-1Mo-Nb-V |
9Cr-2W |
12Cr-1Mo-1W
-V-Nb
|
11Cr-0.4Mo
-2W-Nb-V-Cu |
9/12Cr-3W-3Co
-Nb-Nd-B
|
YS
min. (MPa)
TS min. (MPa)
|
205
415
|
400
510
|
415
585
|
440
620
|
390
590-740
|
400
620
|
470
685
|
Thickness
of steam
oxidation scale
(650°Cx1000hr)
|
－ |
－ |
90µm
(Total
layer) |
90µm
(Total
layer) |
50µm
(Total
layer) |
50µm
(Total
layer) |
50µm
(Total
layer) |
Coal
ash corrosion**
(650°Cx20hr, mg/cm2)
|
－ |
－ |
119 |
119 |
85 |
85 |
85 |
Welding
material |
GTAW |
OK |
OK |
OK |
OK |
OK |
OK |
OK |
SMAW |
OK |
OK |
OK |
OK |
(HCM12A Type)
|
OK |
OK |
SAW |
OK |
Under
development
|
OK |
OK |
(HCM12A Type)
|
OK |
OK |
PWHT
|
Mandatory |
Applicable
without PWHT |
Mandatory |
Mandatory |
－ |
Mandatory |
Mandatory |
|
|
| Note: ( * Calculated
value according to ASME) (** Gas:1%SO2-5%O2-15%CO2-Bal
N2, Ash:1.5MNa2SO4-1.5Mk2SO4-1MFe2O3) |
|
HCM2S(0.06C-2.25Cr-1.6W-0.1Mo-0.25V-0.05Nb-B) |
Strength: Almost twice conventional T22 (10CrMo910)
Weldability: Applicable without preheating
and PWHT
Welding Filler: Matching
Fillers of GTAW, GMAW, SMAW and [SAW]
Application: Waler Wall Tube, Reheater, Superheater, Header,
Hot Reheat Pipe, Plates and Forgings
Designation: ASTM, ASME, Japanese MITI Code
|
|
HCM12A(0.1C-11 or 12Cr-2W-0.3Mo-Cu-V-Nb-B-N) |
Strength: Twice X20
Weldability: Superior to X20
and same as T91/P91
Corrosion Resistance: Same as
X20 and superior to T91
Application: Superheater,
Reheater, Main steam pipe, Header, Plate
and Fittings
Designation: ASTM, ASME, Japanese MITI Code |
|
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2006 Sumitomo Metals - Tubular Division. All rights
reserved.
|
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|
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