ENiMo-7 DMHAST-B2
Class: ENiMo-7
AWS: A5.11
DURAMAX HAST-B2 CTD ELECTRODE
Conforms to Certification: AWS A5.11 | ASME SFA 5.11
Weld Process: Shielded Metal Arc Weld Process (SMAW)
| AWS Chemical Composition Requirements | |
| C = 0.02 max | Cu = 0.50 max |
| Mn = 1.75 max | Ni = Remainder |
| Fe = 2.25 max | Co = 1.0 max |
| P = 0.04 max | Cr = 1.0 max |
| S = 0.03 max | Mo = 26.0 – 30.0 |
| Si = 0.20 max | W = 1.0 max |
| Other = 0.50 max | |
Please contact us for more information and availability
Application
DURAMAX HAST-B2 is a nickel-molybdenum flux-coated electrode developed specifically for welding similar base metals such as Hastelloy B2 to itself or to steel and nickel alloys. Common base metals that can also be welded would include ASTM B333, B335, B619, B622 and B626 all of which have UNS number N10665. DMHAST-B2 has a controlled low level of carbon, iron and cobalt which together with the nickel and molybdenum gives this electrode excellent resistance to pitting and stress corrosion cracking commonly caused by acids. The most common application of DMHAST-B2 would be in the chemical processing industries on parts exposed to all concentrations and temperatures of hydrochloric acid. It is also used on parts subjected to sulfuric, phosphoric and acetic acids.
DMHAST-B2 should not be used in the presence of cupric or ferric salts which may develop where iron or copper bearing alloys have come in contact with acids.
| Deposited Chemical Composition % (Typical) | ||
| C = 0.01 | Mn = 1.20 | Fe = 1.50 |
| P = 0.001 | S = 0.02 | Si = 0.11 |
| Cu = 0.35 | Ni = Remainder | Co = 0.40 |
| Cr = 0.60 | Mo = 28.50 | W = 0.45 |
| TOE = <0.50 | ||
| Deposited All Weld Metal Properties % (AW) | |
| Tensile Strength | 807 N/mm2 |
| Yield Strength | |
| Elongation | 28% 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 |