AWS Class ERNICRMO-14 MIG & TIG
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ERNiCrMo-14 MIG & TIG Filler Metal and Wire: Supplier in India
Nicorex Alloys is a Mumbai-based supplier, trader and stockist of ERNiCrMo-14 TIG filler rods and MIG welding wire. As an ISO 9001 and ISO 14001 certified importer, we supply Inconel 686 filler metal as per AWS A5.14.
Alloy 686 welding wire is a nickel‑based alloy containing about 57% Ni, 21% Cr, 16% Mo and 4% W. The tungsten addition makes it different from other NiCrMo fillers. It combines the high chromium levels of C‑22 and Alloy 59 with the strong reducing‑acid resistance of C‑276 in a single weld deposit. Low carbon (max 0.01%) and silicon (max 0.08%) help prevent carbide and silicide buildup at grain boundaries, improving corrosion resistance. In waste‑to‑energy plants, ERNiCrMo‑14 (INCO‑WELD 686CPT) provides much better life due to its very high combined Cr+Mo+W content. ERNiCrMo‑14 is also identified as UNS N06686, ASME SFA 5.14, EN ISO 18274 S Ni 6686, and Werkstoff number 2.4606. TIG rods are available in 0.9-3.2 mm diameters and MIG wire in 0.8-1.6 mm. The weld metal typically reaches 758 MPa (110 ksi) tensile strength with about 35% elongation, giving a strong, ductile joint.
This Inconel 686 filler is used in harsh, corrosion-prone environments such as waste-to-energy incineration, flue gas desulphurisation systems, chemical plants, pulp and paper mills, oil and gas production and pharmaceutical equipment. Every consignment from Nicorex Alloys is supplied with a Mill Test Certificate 3.1 to EN 10204, ensuring full heat and lot traceability.
ERNiCrMo-14 Welding Wire Specifications
The full specification for ERNiCrMo-14 MIG and TIG filler metal, covering classification, process data, diameters and welding parameters, is listed below.
| AWS Classification | ERNiCrMo-14 per AWS A5.14 |
|---|---|
| UNS Designation | N06686 |
| Welding Processes | GTAW (TIG), GMAW (MIG), SAW |
| Polarity | GTAW: DCEN | GMAW: DCEP |
| Welding Positions | All (Flat, Horizontal, Vertical-Up, Vertical-Down, Overhead) |
| Shielding Gas | GTAW: 100% Argon GMAW: 100% Argon or Ar/He blends |
| SAW Flux | INCOFLUX NT120 (Special Metals) |
| TIG Rod Diameters | 0.9, 1.0, 1.6, 2.4, 3.2 mm |
| MIG Wire Diameters | 0.8, 0.9, 1.0, 1.14, 1.2, 1.6 mm |
| TIG Rod Length | 915 mm (36″) or 1000 mm (39″) |
AWS Classification Explained: What Does ERNiCrMo-14 Mean?
The AWS designation breaks down letter by letter, and each segment identifies a distinct property of the filler metal.
| Designation Element | Meaning |
|---|---|
| ER | Electrode/Rod: bare solid wire for GTAW, GMAW, SAW, and PAW |
| Ni | Primary element is Nickel (remainder, approximately 57%) |
| Cr | Chromium (19.0–23.0%) |
| Mo | Molybdenum (15.0–17.0%) |
| 14 | 14th composition variant in the NiCrMo family within AWS A5.14 |
Weld Deposit Chemical Composition of ERNiCrMo-14
ERNiCrMo-14’s key advantage is its very high combined chromium, molybdenum and tungsten (Cr+Mo+W) content. Refer to the table below for the detailed chemical composition:
| Element | Nickel + Cobalt (Ni+Co) | Chromium (Cr) | Molybdenum (Mo) | Tungsten (W) | Iron (Fe) | Carbon (C) | Manganese (Mn) | Silicon (Si) | Copper (Cu) | Aluminium (Al) | Titanium (Ti) | Phosphorus (P) | Sulphur (S) | Others |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Composition (wt%) | Remainder (~57) | 19.0–23.0 | 15.0–17.0 | 3.0–4.4 | 5.0 max | 0.01 max | 1.0 max | 0.08 max | 0.5 max | 0.5 max | 0.25 max | 0.02 max | 0.02 max | 0.50 max |
Carbon (max 0.01%) and silicon (max 0.08%) follow the clean‑chemistry of ERNiCrMo-13 (Alloy 59), avoiding carbide and silicide at grain boundaries. Tungsten (3.0-4.4%) boosts resistance to reducing acids and adds strength. Actual weld chemistry depends on dilution and parameters.
All-Weld-Metal Mechanical Properties of ERNiCrMo-14
This table summarises the typical as-welded mechanical properties of ERNiCrMo-14, including tensile strength, elongation, and AWS A5.14 minimum requirements.
| Property | Tensile Strength (typical) | Tensile Strength (AWS A5.14 minimum) | Elongation, 4d (typical) |
|---|---|---|---|
| Value | 758 MPa (110,000 psi) | 690 MPa (100 ksi) | 35% |
Base Metal Compatibility and P-Number Matrix for ERNiCrMo-14
ERNiCrMo-14 is a highly over-alloyed filler that gives better corrosion resistance than any NiCrMo base metal.
| Joint Type | Base Metal (UNS) | P-Number | Matching |
|---|---|---|---|
| Matching | Inconel 686 (N06686) | P-43 | Over-alloyed |
| Over-alloyed | Hastelloy C-276 (N10276) | P-43 | Over-alloyed |
| Over-alloyed | Hastelloy C-22 (N06022) | P-43 | Over-alloyed |
| Over-alloyed | Alloy 59 (N06059) | P-43 | Over-alloyed |
| Over-alloyed | Inconel 625 (N06625) | P-43 | Over-alloyed |
| Over-alloyed | Super Duplex 2507 (S32750) | P-10H | Over-alloyed |
| Over-alloyed | 254 SMO (S31254), AL-6XN (N08367) | P-45 | Overlay cladding |
| Overlay cladding | Carbon steel (P-1) and alloy steel vessels | P-1 / P-3 / P-4 |
Recommended Welding Parameters for ERNiCrMo-14 Wire
The table below provides the recommended welding parameters for eRNiCrMo-14 wires. For this high Mo+W weld metal, always keep the heat input as low as possible.
GTAW (TIG) Parameters
| Rod Diameter | Current (A) | Voltage (V) |
|---|---|---|
| 1.6 mm | 80–130 | 12–15 |
| 2.4 mm | 120–175 | 13–17 |
| 3.2 mm | 150–220 | 14–18 |
Shielding gas: 100% Argon. Root protection with Ar 4.6 is mandatory.
GMAW (MIG) Parameters: Spray Transfer
| Wire Diameter | Current (A) | Voltage (V) |
|---|---|---|
| 0.9 mm | 80–100 | 18–20 |
| 1.2 mm | 180–250 | 28–32 |
Use 100% Argon or Argon/Helium gas. For thin sections, use pulsed GMAW. Run stringer beads only (no weaving). Keep interpass temperature below 150°C, with no preheat and no PWHT needed.
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Industrial Welding Applications of ERNiCrMo-14 (Inconel 686) Filler Wire
ERNiCrMo-14 is mainly used in harsh environments where standard NiCrMo filler metals fail under mixed oxidising, reducing and chloride attack.
- Waste-to-energy incineration: Used for boiler tube overlay cladding in flue gases containing HCl, SO₂/SO₃ and alkali chlorides (NaCl, KCl, ZnCl₂) at 300-500°C.
- Flue gas desulphurisation (FGD): Used in scrubber vessels, internal parts, reheater tubes, and mist eliminators in wet FGD systems that handle hot, acidic liquids and vapours.
- Chemical processing: Used for reactor vessels and heat exchangers exposed to mixed acids with chlorides.
- Pulp and paper: Used in chlorine dioxide (ClO₂) generators and bleach plant equipment in harsh, high-chloride conditions.
- Oil and gas: Used in subsea equipment, sour service parts, and production systems that need high pitting resistance.
- Pharmaceutical: Ultra-pure acid processing vessels and high-purity chemical reactors.
- Over-alloyed welding and cladding: Use this wire to weld or clad C-276, C-22, 625, Alloy 59, super duplex and super-austenitic stainless steels for top corrosion resistance.
Storage and Handling of ERNiCrMo-14 Welding Filler Wire
ERNiCrMo-14 is a solid bare wire, preventing moisture absorption. The main quality risk is surface contamination, which is critical for this ultra-low C/Si alloy.
- Store in original sealed packaging in a clean, dry environment. Temperature 15-30 0C, humidity below 60% RH.
- Keep wire away from carbon steel tools, machining oils, cutting fluids, paint, galvanised materials, copper tooling, lead-containing compounds and sulphur-bearing shop chemicals.
- Handle with clean, lint-free gloves and only use stainless steel or nickel-alloy tools, never carbon steel brushes or clamps.
- Store TIG rods in sealed tubes. After opening, keep them clean, and put unused rods back in the tube. Keep off the floor.
- Protect MIG spools from dust and airborne contamination, and always cover the spool on the wire feeder when not welding.
- Before welding: degrease base metal and filler surfaces with acetone or MEK. Remove all oxide, paint, marker and foreign material within 25mm of the joint.
- For ENiCrMo-14 SMAW electrodes (AWS A5.11), store them in heated rod ovens at 120-200°C after opening the sealed cans.
Available Forms, Diameters and Packaging of ERNiCrMo-14 Wire
ERNiCrMo-14 filler wire is stocked in four product forms covering all arc welding processes.
| Form | Diameters | Packaging |
|---|---|---|
| TIG Rod (GTAW) | 0.9, 1.0, 1.6, 2.4, 3.2 mm | 915 mm (36″) or 1000 mm (39″) tubes, 5 kg packs |
| MIG Wire (GMAW) | 0.8, 0.9, 1.0, 1.14, 1.2, 1.6 mm | 15 kg spools |
| SAW Wire | 1.6, 2.4, 3.2 mm | Coils (25 kg) |
| SMAW Electrode (ENiCrMo-14) | 2.4, 3.2, 4.0 mm | Hermetically sealed cans (2.5 kg, 5 kg) |
All ERNiCrMo-14 MIG and TIG filler metal and wire from Nicorex Alloys are supplied with a Mill Test Certificate 3.1 per EN 10204.
How to Order ERNiCrMo-14 Filler Metal from Nicorex Alloys
When ordering ERNiCrMo-14 (Inconel 686) consumables, include the following details in your RFQ.
- AWS Classification - ERNiCrMo-14 per AWS A5.14
- Wire Diameter(s) - Specify required sizes
- Quantity - In kg
- Packaging Preference - Tubes / Spools / Cans
- Third-Party Approvals - ABS / DNV / Lloyds / Bureau Veritas / TUV
- Test Certificate Requirement - MTC 3.1 per EN 10204
- Delivery Destination - Domestic India / International Export
Nicorex Alloys supplies a complete Inconel 686 welding consumable set: ERNiCrMo-14 TIG rods, ERNiCrMo-14 MIG wire, and matching ENiCrMo-14 SMAW electrodes.
Frequently Asked Questions
What makes ERNiCrMo-14 different from ERNiCrMo-4 (Hastelloy C-276) welding wire?
ERNiCrMo-14 contains about 21% Cr, compared to 16% Cr in ERNiCrMo-4, while both have around 16% Mo and 4% W. The extra chromium gives ERNiCrMo-14 better resistance in oxidising and chloride-contaminated environments. ERNiCrMo-4 (C-276) is better at purely reducing acids, but 14 is preferred in mixed oxidising/reducing with chlorides.
Why is ERNiCrMo-14 the preferred filler for waste Incineration boiler tube overlay?
Waste incineration flue gas condensates contain an aggressive mix of acids and chlorides at 300-500°C. They attack metals in both oxidising and reducing mechanisms.
When should ERNiCrMo-14 not be used?
Don’t use ERNiCrMo-14 if ERNiCrMo-3 (Inconel 625) or ERNiCrMo-4 (C-276) already provides enough corrosion resistance. Avoid service above 650°C due to mu/sigma phases. Do not use CO2 shielding gas, as it causes oxidation and chromium loss.
What SAW flux is recommended for submerged arc welding with ERNiCrMo-14?
Use INCOFLUX NT120 flux for submerged arc welding (SAW) with INCO-WELD 686CPT (ERNiCrMo-14) wire. This flux helps maintain the weld’s ultra-clean chemistry by preventing contamination from extra carbon, silicon, and other impurities.
Does Nicorex Alloys stock ERNiCrMo-14 for immediate delivery?
Yes. Nicorex Alloys maintains some diameters in stock and can quickly source non-stock diameters and forms. Share your required diameter, form and quantity to check current availability and delivery time.