 |
CHH408
Heat-resisting Steel Welding
Electrode |
AWS A5.5
E9018-B3
ISO 3580-B-E 62 18-2C1M
EN 1599-E CrMo2 B
GB/T 5118 E6018-B3 |
| |
Description:
CHH408
is potassium low
hydrogen iron powder type, low alloy welding rods. With a trait of
resistance of high temperature and oxidation, it is suitable for fabricating
equipments of chemical and petroleum industries as well as high temperature,
high press pipes, which made by Cr2.5Mo low alloy steel that working
temperature lower than 550℃, e.g. Catalytic cracker. All position welding is
obtained and short arc is recommended. It is should be backed at a
temperature of 350℃-380℃ for 1 hour before welding. The welded piece should
be preheated to 300℃ before welding and it is must be tempered at 660℃-690℃
for 1 hour after welding.
|
Chemical
Composition of Deposited Metal(%)
|
|
C |
Mn |
Si |
S |
P |
Cr |
Mo |
|
Standard |
0.05-0.12 |
≤0.90 |
≤0.80 |
≤0.03 |
≤0.03 |
2.00-2.50 |
0.90-1.20 |
|
Typical |
0.08 |
0.75 |
0.24 |
0.010 |
0.012 |
2.34 |
1.14 |
Mechanical Properties of Deposited Metal (690 C x
1)
|
|
Yield Point
ReL
(MPa) |
Tensile Strength
Rm (MPa) |
Elongation
A4 (%) |
Impact Value (J) |
|
25℃ |
|
Standard |
≥530 |
≥620 |
≥17 |
— |
|
Typical |
580 |
680 |
20 |
180 |
X-ray defectoscopy:
Ⅰ
Moisture contained in coating flux:
≤0.15%
Sizes, Pieces & Recommended Current Range
(AC or 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) |
60-90 |
90-120 |
140-180 |
170-210 |
