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CHH717
Heat-resisting Steel Welding Rod |
AWS A5.5 E9015-B9
ISO 3580-B-E 62 15-9C1MV
EN 1599-E CrMo91 B
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Description:
CHH717
is a sodium low
hydrogen martensite heat resisting low alloy welding rods. It is suitable
for fabricating supercritical steam turbines and boilers as well as its
pipes, which made by martensite heat resisting low alloy steels of
ZG1Cr10MoVNbN or T91/P91. Both preheating temperature and interpass
temperature should be 232℃-288℃ and the weld zone must be tempered at
730℃-760℃ for 6 hours after welding.
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Chemical
Composition of Deposited Metal(%)
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|
C |
Mn |
Si |
S |
P |
Cr |
Ni |
|
Standard |
0.08-0.13 |
≤1.20 |
≤0.30 |
≤0.01 |
≤0.01 |
8.0-10.5 |
≤0.8 |
|
Typical |
0.094 |
0.75 |
0.22 |
0.004 |
0.009 |
9.32 |
0.66 |
|
|
Mo |
Cu |
Al |
N |
Nb |
V |
|
|
Standard |
0.85-1.20 |
≤0.25 |
≤0.04 |
0.02-0.07 |
0.02-0.10 |
0.15-0.30 |
|
|
Typical |
1.03 |
0.020 |
0.005 |
0.03 |
0.053 |
0.208 |
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Mechanical Properties of Deposited Metal (760 C x
6h)
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|
Yield Point
ReL
(MPa) |
Tensile Strength
Rm (MPa) |
Elongation
A4 (%) |
Impact Value (J) |
|
25℃ |
|
Standard |
≥530 |
≥620 |
≥17 |
— |
|
Typical |
630 |
740 |
21 |
80 |
X-ray defectoscopy:
Ⅰ
Moisture contained in coating flux:
≤0.15%
Sizes, Pieces & Recommended Current Range
(DC+)
|
Size (mm) |
2.5 x 300 |
3.2 x 350 |
4.0 x 400 |
5.0 x 400 |
|
Pieces (5kg) |
≈299 |
≈160 |
≈88 |
≈57 |
|
Current (A) |
70-90 |
80-110 |
140-160 |
160-200 |
