Introduction:Suitable for fabricating pipes of supercritical steam turbines and boilers ,which made by martensite heatre sisting steels. Both preheating and interpass temperature should be 232-288℃ and the weld zone should be tempered at 730-760℃ for 6 hours after welding.
Standard & Typical Chemical Composition of Deposited Metal (%)
|
Chemical Composition
|
C
|
Mn
|
Si
|
S
|
P
|
Cr
|
Ni
|
Mo
|
V
|
Cu
|
Other
|
||
|
Specification
|
0.08-0.13
|
≤1.20
|
≤0.30
|
≤0.01
|
≤0.01
|
8.00-10.50
|
≤0.80
|
0.85-1.20
|
0.15-0.30
|
Cu≤0.25
|
N0.02-0.07
|
Nb 0.02-0.10
|
Al≤0.04
|
|
Actual result
|
0.094
|
0.75
|
0.22
|
0.004
|
0.009
|
9.32
|
0.66
|
1.03
|
0.208
|
0.02
|
0.03
|
0.053
|
0.005
|
Standard & Typical Mechanical Properties of Deposited Metal
|
Test Item
|
Postweld Condition
|
Yield Point ReL (MPa)
|
Tensile Strength Rm(MPa)
|
Elongation A4(%)
|
Akv Value (J)
|
|
Specification
|
PWHT
760℃X6h
|
≥530
|
≥620
|
≥17
|
-
|
|
Actual Result
|
630
|
740
|
21
|
25℃ 80
|
Size and Current (DC +)
|
Dia.(mm)
|
2.5
|
3.2
|
4.0
|
5.0
|
|
Length(mm)
|
300
|
350
|
350
|
350
|
|
Current(A)
|
70-90
|
80-110
|
140-160
|
160-200
|
