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Product Description

 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

  

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