Introduction:Welding of corresponding low alloy steel structures,such as gas transmission pipeline with high temperature,high pressure turbogenerator unit and boiler,working temperature of which is below 550℃.
Standard & Typical Chemical Composition of Deposited Metal (%)
|
Chemical Composition
|
C
|
Mn
|
Si
|
S
|
P
|
Cr
|
Ni
|
Mo
|
V
|
Cu
|
Other
|
|
Specification
|
0.05-0.12
|
≤0.90
|
≤1.00
|
≤0.03
|
≤0.03
|
2.00-2.50
|
-
|
0.90-1.20
|
-
|
-
|
-
|
|
Actual result
|
0.067
|
0.65
|
0.38
|
0.012
|
0.016
|
2.23
|
1.02
|
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
690℃X1h
|
≥530
|
≥620
|
≥17
|
-
|
|
Actual Result
|
570
|
680
|
20
|
25℃ 140
|
Size and Current ( DC +)
|
Dia.(mm)
|
2.5
|
3.2
|
4.0
|
5.0
|
5.8
|
|
Length(mm)
|
300
|
350
|
400
|
400
|
400
|
|
Current(A)
|
60-90
|
90-120
|
140-180
|
170-210
|
210-240
|
