ENiCu-7 DMNA190
Class: ENiCu-7
AWS: A5.11
DURAMAX NA190
Conforms to Certification: AWS A5.11 | ASME SFA 5.11
Weld Process: Shielded Metal Arc Weld Process (SMAW)
| AWS Chemical Composition Requirements | |
| C = 0.15 max | Cu = Remainder |
| Mn = 4.0 max | Ni = 62.0 – 69.0 |
| Fe = 2.5 max | Al = 0.75 max |
| P = 0.02 max | Ti = 1.0 max |
| S = 0.015 max | Si = 1.5 max |
| Other = 0.50 max | |
Please contact us for more information and availability
Application
DURAMAX NA190 (ENiCu-7) has a nominal composition (wt.-%) of 66 Ni, 30 Cu, 3 Mn, 1 Fe. Electrodes of this classification are used for welding nickel-copper alloys to themselves and to steel, for welding the clad side of joints in steel clad with a nickel-copper alloy, and for surfacing steel with nickel-copper alloy weld metal. Typical specifications for the nickel-copper base metal are ASTM B 127, B 163, B 164, and B 165, all of which have a UNS Number N04400. The weld metal is suitable for service both in the as-welded condition and after an appropriate post weld heat treatment. Qualification tests should be conducted beforehand to make certain the necessary properties can be obtained after the particular heat treatment is employed.
DMNA190 is well suited for welding in salt, seawater, and reducing acid environments.
| Deposited Chemical Composition % (Typical) | ||
| C = 0.084 | Mn = 3.53 | Fe = 0.73 |
| P = 0.005 | S = 0.002 | Si = 0.84 |
| Cu = 27.46 | Ni = 66.82 | Al = 0.02 |
| Ti = 0.41 | TOE = <0.50 | |
| Deposited All Weld Metal Properties % (AW) | |
| Tensile Strength | 480 N/mm2 Min |
| Yield Strength | |
| Elongation | 30% Min |
Deposited Charpy-V-Notch Impact Properties %
Not applicable
Recommended Weld Parameters |
Amperage (A) |
||
| Diameter of Wire | Voltage (V) | Flat | Vertical and Overhead |
| 3/32 inches (2.4mm) | 20 – 23 | 70 – 80 | 65 – 80 |
| 1/8 inches (3.2mm) | 21 – 24 | 80 – 110 | 75 – 95 |
| 5/32 inches (4.0mm) | 22 – 25 | 120 – 160 | Not recommended |
| 3/16 inches (4.8mm) | 23 – 25 | 170 – 190 | Not recommended |