Introduction:For welding low alloy CrMo steel structures,which working temperature is below 520℃. Such as boiler pipes,petroleum thermal cracking equipment,etc.
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
|
≤0.60
|
≤0.035
|
≤0.035
|
0.80-1.50
|
-
|
0.40-0.65
|
-
|
-
|
-
|
|
Actual result
|
0.067
|
0.70
|
0.37
|
0.011
|
0.015
|
1.14
|
0.51
|
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
620℃X1h
|
≥440
|
≥540
|
≥17
|
25℃ ≥27
|
|
Actual Result
|
510
|
610
|
24
|
160
|
Size and Current (DC+)
|
Dia.(mm)
|
2.0
|
2.5
|
3.2
|
4.0
|
5.0
|
|
Length(mm)
|
300
|
300
|
350
|
400
|
400
|
|
Current(A)
|
40-70
|
60-90
|
90-120
|
140-180
|
170-210
|
