Hastelloy B3 (ENiMo-10) Welding Electrode Supplier in India
Nicorex Alloys is an ISO 9001 certified supplier and stockist of Alloy B-3 welding consumables with EN 10204/3.1B mill test certificates in Mumbai, India. For reducing acid service projects requiring certified material traceability, the full ENiMo-10 electrode range (2.4 mm through 4.7 mm) is available for dispatch from its Mumbai warehouse.
Welding equipment for concentrated hydrochloric acid service has historically suffered from a critical limitation: The ENiMo-10 welding electrode (AWS A5.11 / ASME SFA 5.11, UNS W860675) eliminates this problem. Developed as the matching SMAW consumable for Alloy B-3 (UNS N10675), this nickel-molybdenum-coated electrode deposits weld metal with 27-32% Mo, the highest molybdenum content of any standard AWS electrode classification, while inducing slowly forming Ni₃Mo instead of the rapid, damaging Ni₄Mo.
The weld deposit is resistant to hydrochloric acid at all concentrations and temperatures, a capacity that cannot be matched by C-type alloys. In addition to being resistant to hydrogen chloride gas, it is also resistant to sulfuric acid, acetic acid, hydrofluoric acid, and phosphoric acid. For cladding and overlay, this electrode bonds directly to carbon and stainless steel substrates without requiring a butter layer. The tensile strength of this alloy is 760 MPa (110 ksi) with 25% elongation. ASME IX F-43 qualified. The DCEP polarity is available in all standard diameters ranging from 2.4 mm to 4.7 mm. Target industries are chemical processing, pharmaceutical, oil and gas, nuclear, and MRO. Contact Nicorex Alloys for a quotation with MTC and fast dispatch.
ENiMo-10 Specifications and Welding Classifications
| AWS Classification | ENiMo-10 |
|---|---|
| ASME Classification | SFA 5.11 ENiMo-10 |
| AWS Specification | AWS A5.11 |
| UNS Number (Electrode) | W860675 |
| UNS Number (Base Alloy B-3) | N10675 |
| UNS Number (Base Alloy B-2) | N10665 |
| Welding Process | SMAW (Shielded Metal Arc Welding) |
| Polarity | DCEP (DC Electrode Positive) |
| ASME IX F-Number | F-43 |
| ASME IX A-Number | N/A (non-ferrous filler per QW-442) |
Chemical Composition of ENiMo-10 Weld Deposit
| Nickel (Ni) | Molybdenum (Mo) | Iron (Fe) | Chromium (Cr) | Cobalt (Co) | Tungsten (W) | Manganese (Mn) | Silicon (Si) | Carbon (C) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|---|---|---|---|---|---|
| Balance (~65% nominal) | 27.0-32.0 | 1.0-3.0 | 1.0-3.0 | 3.0 max | 3.0 max | 2.0 max | 0.2 max | 0.02 max | 0.04 max | 0.03 max |
Mechanical Properties of ENiMo-10 Weld Metal
| Property | Tensile Strength (min) | Elongation (min) | Yield Strength |
|---|---|---|---|
| Value | 760 MPa (110,000 psi) | 25% | Not specified in AWS A5.11 |
Compatible Base Metals for ENiMo-10 Welding
Base Metals: Along with Alloy B-3, our ENiMo-10 electrodes are designed for SMAW of these specific base metals listed in the table.
| Base Metal / Alloy | UNS | Applicable ASTM Standards / Notes |
|---|---|---|
| Alloy B-3 (primary) | N10675 | B333, B335, B622, B619, B626, B366, B564 |
| Alloy B-2 | N10665 | B333, B335, B622, B619, B626, B366, B564 |
| Carbon steel (cladding) | – | Overlay without butter layer |
| Stainless steel (cladding) | – | Overlay without butter layer |
B333 covers plate/sheet, B335 rod/bar, B622 seamless pipe, B619 welded pipe, B626 welded tube, B366 fittings, and B564 forgings. The Alloy B-3 welding rod welds both B-3 and B-2 base metals, which is critical for mixed-fleet maintenance.
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Industries and Applications for Hastelloy Alloy B-3 Coated Electrode
- In concentrated HCl, sulfuric acid, acetic acid, and hydrofluoric acid processing, vessel materials must withstand acid attack. ENiMo-10 deposits resist hydrochloric acid at various temperatures and concentrations. Reaction vessels, heat exchangers, pipelines, and distillation columns.
- Plants producing Active Pharmaceutical Ingredients use aggressive reducing chemicals. ENiMo-10 deposits maintain purity requirements while resisting acid attack in reactor vessels and transfer piping.
- Refinery operations use Alloy B-3 for sour gas streams and chloride-contaminated crude. ENiMo-10 deposits resist chloride stress corrosion cracking, replacing B-2 welds that historically failed due to embrittlement.
- ENiMo-10 coats carbon and stainless steel containers without butter. Without one full welding pass, fabrication time is saved. Inner vessels, tube sheets, and nozzle bores are typical usage.
- ENiMo-10 may be specified for certain nuclear-related components subject to applicable codes and approval. Alloy B-3 outperforms zirconium alloys in fluoride and concentrated sulfuric acid service.
- Where older B-2 welds cracked due to Ni4Mo formation, ENiMo-10 provides a direct replacement that eliminates the root cause. B-3 deposits resist the same embrittlement that caused the original failure.
Available Sizes and Welding Parameters
| Dia (mm) | Dia (in) | Length | Pack Wt. | Current (A) | Polarity |
|---|---|---|---|---|---|
| 2.4 | 3/32 | 254 mm | 2.3 kg (5 lb) | 40-70 | DCEP |
| 3.2 | 1/8 | 356 mm | 4.5 kg (10 lb) | 70-100 | DCEP |
| 4.0 | 5/32 | 356 mm | 4.5 kg (10 lb) | 80-140 | DCEP |
| 4.7 | 3/16 | 356 mm | 4.5 kg (10 lb) | 120-150 | DCEP |
Storage, Handling, and Reconditioning of HASTELLOY B-3 Electrodes
How to Order Hastelloy Alloy B-3 (ENiMo-10) Welding Electrode from Nicorex Alloys
- Electrode Type — SMAW; AWS A5.11 / ASME SFA-5.11: ENiMo-10
- Size — 2.4 mm, 3.2 mm, 4.0 mm, 4.8 mm; electrodes
- Current Type — DCEP only
- Welding Position — All positions (1G, 2G, 3G, 4G, 6G)
- Material Grade — Hastelloy B-3; UNS N10675; W.Nr. 2.4600; EN ISO 14172: E Ni 1066
- Quantity — Specify the number of cans or the total kg required
- Standard — AWS A5.11 / ASME SFA-5.11; EN ISO 14172; ASME Section IX
- Documentation — MTC EN 10204 3.1/3.2; PMI Report; NACE MR0175 compliance; TPI certificate
- Packaging — Hermetically sealed metal cans; ISPM 15 compliant export cartons
- Delivery Destination — Domestic / International; specify port or delivery address