AquaSan Ni50 is a specially formulated, nickel based covered electrode with a waterproof coating for the welding of high strength steels with a Carbon Equivalent (CE) >0.4.
AquaSan Ni50 is specified for welding base materials with a CE >0.4, which are susceptible to hydrogen embrittlement. Nickel has a high affinity for hydrogen and this composition allows hydrogen to diffuse into the weld metal and away from the high strength steel.
Standards
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AWS A5.35: (pending initial publication).
Chemical composition (nominal) %
| C | Si | Mn | Cr | Ni | Mo |
|---|---|---|---|---|---|
| ≤0.08 | 0.3 | 2.4 | 12 | 64 | 6.5 |
Applications
AquaSan Ni50 has been qualified for underwater welding of the following steel types to a maximum depth of 50 ft (15m):
| Grades: HY 80, HY 100, 204B, A36, 300 series stainless steels |
Forms of supply
Packaging
One 30 lb (13.5 kg) carton of AquaSan Ni50 electrodes includes 3 x 10 lb (4.5 kg) plastic containers. Each 10 lb plastic container includes 5 x 2 lb (0.9 kg) sealed plastic bags.
Weld metal characteristics
Microstructure
The all weld metal for AquaSan Ni50 has a fully Austenitic matrix.
Mechanical properties
| Temperature | °C (°F) | 20 (68) |
| Proof strength, RP0.2 |
MPa (ksi) | 524 (76) |
| Tensile strength, Rm | MPa (ksi) | 648 (101) |
| Elongation, A5 | % | 14 |
Fabrication
Welding data
| Welding positions | All |
| Current/polarity | DC/- |
| Diameter, mm (in.) | 2.4 mm (0.093) |
| Current, A | 90-110 (105 typical) |