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Golden Bridge

Golden Bridge (R707) Electrode

Golden Bridge (R707) Electrode

SKU:R707-1/16-0005

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R707




R707 is a pearlite heat-resistant steel welding electrode with low-hydrogen sodium coating containing Cr9Mo. It adopts DCEP connection method and is permitted for all positions welding. The work piece should be properly preheated and heat-treated after welding according to its structural characteristics.



The product is applicable for welding Cr9Mo heat-resistant steel structures and superheater pipes.

Chemical components of deposited metal (%)

Test item
C
Mn
Si
S
P
Cr
Mo
Ni
Example value 0.068 0.75 0.30 0.007 0.014 8.95 0.98 0.018
 

Mechanical properties of deposited metal (preheated at 725-755℃×1h)

Test item
Rm (MPa)
ReL/Rp0.2 (MPa)
A (%)
Example value 740 630 20
X-ray flaw detection requirements: Level I

Reference current (DC+)

Welding electrode diameter (mm)
Φ2.5
Φ3.2
Φ4.0
Φ5.0
Welding current (A) 60-90 90-120 140-180 170-210
 




1. Before welding, the welding electrode should be baked at about 400℃ for 1h for ready use.
2. Impurities such as rust, oil stain and moisture must be removed from the work piece before welding.


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Diameter

* 1/16 inches (1.6 mm), * 3/32 inches (2.4 mm), * 1/8 inches (3.2 mm), * 5/32 inches (4.0 mm), * 3/16 inches (5.0 mm)

Package

5 lb, 10 lb, 30 lb, 44 lb, 50 lb