AWS Class ENiCrFe-2 Welding Electrodes
AWS A5.11 ENiCrFe-2 Welding Electrode Supplier in Mumbai, India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified supplier, importer and stockist of ENiCrFe-2 coated electrodes, based in Mumbai, India. We maintain a ready inventory of ENiCrFe-2 electrodes sourced from internationally certified mills, manufactured to AWS A5.11 and ASME SFA 5.11.
ENiCrFe-2 (UNS W86133, Werkstoff Nr. 2.4805), marketed as Inco-Weld A and Alloy A, is a nickel-chromium-iron coated electrode with a basic low-hydrogen coating for SMAW on DCEP polarity. The weld deposit contains approximately 69% Ni, 16% Cr, 7.7% Fe, 1.9% Mo and 1.9% Nb. That deliberate Mo addition at 0.5-2.5% improves ENiCrFe-2 resistance to reducing-acid environments. Tensile strength typically reaches 660 MPa against an AWS minimum of 550 MPa (80 ksi), with elongation at 45% and Charpy V-notch toughness of 90 J at -196°C. That cryogenic impact value makes ENiCrFe-2 one of the few SMAW consumables truly qualified for liquid nitrogen and LNG service.Available in diameters of 2.4, 3.2, 4.0, and 4.8 mm, it runs in all positions at smaller sizes and flat/horizontal for 4.0 mm and above. It bridges nickel alloys, carbon steels, stainless steels, cryogenic nickel steels and copper-nickel alloys in a single deposit, serving petrochemical fabrication, cryogenic LNG tanks, power generation boilers, nuclear reactor welds and general maintenance across an operating range of -196°C to 816°C (1500°F).
Every batch ships with an MTC 3.1 per EN 10204, all-weld-metal test results and chemical analysis.
ENiCrFe-2 Electrode Specifications
The specifications for ENiCrFe-2 coated electrodes, covering standards, dimensions, and classification data, are listed below.
| AWS Classification | ENiCrFe-2 |
|---|---|
| ASME SFA Specification | SFA 5.11 (ASME Section II Part C) |
| UNS Number | W86133 |
| Electrode Coating Type | Basic (Low-Hydrogen) |
| Polarity | DCEP (DC Electrode Positive) |
| Welding Positions | All positions (2.4 & 3.2 mm); Flat/Horizontal (4.0 & 4.8 mm) |
| Available Diameters | 2.4 mm (3/32″), 3.2 mm (1/8″), 4.0 mm (5/32″), 4.8 mm (3/16″) |
| Electrode Lengths | 300 mm (12″) for 2.4 mm; 350 mm (14″) for 3.2–4.8 mm |
| Packaging | Hermetically sealed cans — 3.6 kg (8 lb), 4.5 kg (10 lb) |
| Shielding Gas | Not applicable (SMAW — slag-shielded process) |
| Deposition Efficiency | ~62–65% |
| Deposition Rate | 0.90 kg/h (2.4 mm), 1.30 kg/h (3.2 mm), 2.10 kg/h (4.0 mm) |
| Service Temperature Range | −196°C to 816°C (−320°F to 1500°F) |
AWS ENiCrFe-2 Classification Explained
Following is a breakdown of each character of AWS ENiCrFe-2 and its operational meaning.
| Symbol | Meaning | Description |
|---|---|---|
| E | Electrode | Covered electrode used for the SMAW (Shielded Metal Arc Welding) process |
| Ni | Nickel | Primary alloying element in the weld deposit (≥ 62.0%) |
| Cr | Chromium | Major secondary element (13.0–17.0%) for oxidation and corrosion resistance |
| Fe | Iron | The third significant element (≤ 12.0% max), differentiates from low-Fe Ni-Cr types |
| -2 | Variant Number | Identifies the second chemical variant in the NiCrFe electrode family |
The “-2” suffix identifies the second variant in the NiCrFe series. ENiCrFe-1 was the original. ENiCrFe-2 adds controlled Mo (0.5-2.5%) and a wider Nb range (0.5-3.0%) for improved hot-crack resistance and reducing-acid performance. ENiCrFe-3 (Inconel 182) carries higher Mn (5.0-9.5%) with no deliberate Mo. The suffix is not a quality grade; it identifies a specific chemistry. The critical distinction from ENiCrFe-3 is the Mo content and lower Mn in ENiCrFe-2.
Chemical Composition of ENiCrFe-2 Weld Deposit (%)
The table below shows the all-weld-metal chemical analysis for ENiCrFe-2 deposits per AWS A5.11. These values represent the weld deposit composition, not the electrode core wire or the base metal.
| Element | C | Mn | Si | Cr | Ni | Mo | Fe | Nb(Cb)+Ta | Cu | Co | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AWS A5.11 Limits | 0.10 max | 1.0–3.5 | 0.75 max | 13.0–17.0 | 62.0 min (Balance) | 0.50–2.50 | 12.0 max | 0.5–3.0 | 0.50 max | 0.12 max | 0.03 max | 0.02 max |
| Typical Values | 0.03 | 2.7 | 0.5 | 16.1 | 69.0 | 1.9 | 7.7 | 1.9 | — | — | 0.009 | 0.006 |
Mo at 0.5-2.5% is the key compositional difference from ENiCrFe-3. Nb at 0.5-3.0% strengthens grain boundaries and resists hot cracking during solidification. Actual deposit chemistry varies with welding parameters, dilution level, and base metal composition.
All-Weld-Metal Mechanical Properties of ENiCrFe-2
Mechanical properties below represent all-weld-metal test results for ENiCrFe-2 deposits in the as-welded condition per AWS A5.11.
| Property | Tensile Strength | Yield Strength (0.2%) | Elongation in 4D | Charpy V-Notch at +20°C | Charpy V-Notch at −196°C |
|---|---|---|---|---|---|
| AWS A5.11 Minimum | ≥552 MPa (80,000 psi) | — | ≥30% | Not required by AWS | Not required by AWS |
| Typical Values | 660 MPa (95,700 psi) | 420 MPa (60,900 psi) | 45% | 110 J | 90 J |
The 90 J Charpy toughness at −196°C is the single most important mechanical value for LNG tank and cryogenic piping work. It confirms ENiCrFe-2 retains ductile behaviour at liquid nitrogen temperatures, a property few SMAW consumables match.
Base Metal Compatibility & P-Number Matrix for ENiCrFe-2
ENiCrFe-2 is one of the most versatile SMAW consumables in the nickel alloy family, qualified for an exceptionally wide range of base metals in similar and dissimilar combinations.
| Base Metal Group | Typical Alloys | ASME P-Number |
|---|---|---|
| Nickel-Chromium Alloys | Inconel 600, 601, Nimonic 75/80A | P-43 |
| Nickel-Iron-Chromium Alloys | Incoloy 800, 800H, 800HT | P-45 |
| Nickel | Nickel 200, 201 | P-41 |
| Nickel-Copper Alloys | Monel 400, K-500 | P-42 |
| Cryogenic Nickel Steels | 9% Ni (A553), 5% Ni (A645), 3.5% Ni (A203) | P-11A |
| Carbon & Low-Alloy Steels | SA106 Gr. B, SA516 Gr. 70, Cr-Mo steels | P-1, P-3, P-4 |
| Austenitic Stainless Steels | 304/304L, 316/316L, 321, 347 | P-8 |
| Copper-Nickel Alloys | 70/30 CuNi (C71500), 90/10 CuNi (C70600) | P-34 |
Key dissimilar combinations include P-1 to P-8, P-1 to P-43 (carbon steel to Inconel 600), P-8 to P-43, P-1 to P-45 (carbon steel to Incoloy 800), and P-42 to P-1 (Monel 400 to carbon steel).
Recommended Welding Parameters for ENiCrFe-2 Coated Electrode
The table below lists diameter-specific current and voltage settings for ENiCrFe-2 on DCEP polarity. Lower amperage ranges and stringer bead technique are critical for dilution control in dissimilar joints and overlay cladding.
| Diameter | Voltage (V) | Flat Amps (A) | Vert/OH Amps (A) |
|---|---|---|---|
| 2.4 mm (3/32″) | 24–28 | 70–85 | 65–75 |
| 3.2 mm (1/8″) | 26–30 | 85–110 | 80–90 |
| 4.0 mm (5/32″) | 28–32 | 110–140 | 100–120 |
| 4.8 mm (3/16″) | 28–32 | 120–160 | 110–130 |
Maintain a maximum interpass temperature of 150°C (300°F). Keep arc length short, approximately equal to core wire diameter. Use stringer beads; weaving should not exceed 2× core wire diameter. Fill the crater before breaking the arc and restarting adjacent to it. Preheat is not required for nickel alloys, but should match base metal code requirements for dissimilar joints to ferritic steels.
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Industrial Applications of ENiCrFe-2 Welding Rod
Cryogenic toughness, high-temperature oxidation resistance and dissimilar-metal joining capability make ENiCrFe-2 suitable for cryogenic and LNG storage, chemical and petrochemical processing, power generation, nuclear fabrication, industrial furnace equipment, overlay cladding and general maintenance and repair.
- Cryogenic & LNG Storage: Its 90 J Charpy toughness makes it fit for circumferential tank seam welds, nozzle attachments and cryogenic vessel repair in LNG receiving terminals. It is a standard consumable in LNG storage tank fabrication.
- Chemical & Petrochemical Processing: Reactor vessel fabrication, heat exchanger tubesheet welds and valve components in caustic soda, organic acid and moderate reducing-acid service rely on ENiCrFe-2; it is also used for coal gasification and wet-process desulphurisation.
- Power Generation & Boiler Fabrication: Dissimilar metal welds in boiler superheater headers and steam piping use ENiCrFe-2.
- Nuclear Industry: ENiCrFe-2 is used for dissimilar metal butt welds between carbon steel nozzles and stainless steel safe-ends in pressurised water reactors, also used for reactor vessel internal attachments.
- Industrial Furnace & Heat-Treatment Equipment: Joining and repair of Inconel 600 and Incoloy 800/800HT components in carburising furnaces, radiant tubes and retorts rely on ENiCrFe-2.
- Overlay Cladding & Surfacing: Weld overlay of Ni-Cr-Fe alloy is used on carbon steel and low-alloy steel substrates for corrosion resistance in vessel ID cladding, valve surfacing and tubesheet facing.
- General Maintenance & Repair: Field repair of corroded or damaged nickel alloy, stainless steel and dissimilar-metal equipment uses portable SMAW equipment with ENiCrFe-2.
Storage, Handling & Re-Drying Procedures for ENiCrFe-2
Low-hydrogen electrode storage discipline is non-negotiable for nickel alloy consumables. Moisture-contaminated electrodes cause porosity, hydrogen embrittlement risk and weld metal cracking. Dangerous in cryogenic service, where impact toughness is the primary acceptance criterion. Follow these steps:
- Store unopened sealed cans in a dry area at 10-32°C (50-90°F), below 50% RH.
- After opening, transfer electrodes to a holding oven at 120-150°C (250-300°F).
- Maximum atmospheric exposure: 4 hours. If exceeded, reconditioning is mandatory.
- Re-dry at 250-300°C (450-570°F) for 2-3 hours. Maximum 3 re-drying cycles; discard after the third.
- Do not exceed 150°C (300°F) interpass temperature during multi-pass welding.
- Wire spool storage: Not applicable (this is a coated electrode product). For matching GTAW/GMAW wire (ERNiCr-3), store spools in clean, dry conditions, re-sealed in original packaging when not in use.
- Inspect every electrode for coating chips, cracks, or spalling before use. Discard any with visible defects.
How to Order ENiCrFe-2 Coated Electrode from Nicorex Alloys
To place an order for an ENi-Cl (Nickel 99) Electrode, please provide these 10 important details:
- AWS Classification - ENiCrFe-2 per AWS A5.11
- Required Diameter(s) - 2.4 / 3.2 / 4.0 / 4.8 mm
- Quantity Required - In kg or number of cans
- Packaging Preference - Hermetically sealed cans or cardboard cartons
- Third-Party Approvals - DNV / ABS / BV / Lloyds / TÜV / KTA (specify)
- Test Certificate Requirements - MTC 3.1 per EN 10204 (standard); additional testing on request (e.g., Charpy at −196°C for cryogenic service)
- Delivery Address & Required Delivery Date - Delivery address & required delivery date
- Matching Consumables - State if GTAW wire (ERNiCr-3) or GMAW wire is also needed
Frequently Asked Questions
What is the price of ENiCrFe-2 Welding Electrode per Kg in India?
ENiCrFe-2 pricing depends on diameter, quantity and third-party approval requirements. Contact Nicorex Alloys with your specific needs for a current per-kg quotation delivered to your project site.
What is the difference between ENiCrFe-2 and ENiCrFe-3 (Inconel 182) Welding Electrodes?
ENiCrFe-2 contains deliberate Mo at 0.5-2.5% and lower Mn (1.0-3.5%), while ENiCrFe-3 carries no deliberate Mo and higher Mn (5.0-9.5%). ENiCrFe-2 offers better resistance to reducing acids. ENiCrFe-3 may offer marginally better positional weldability. ENiCrFe-2 also has a higher Ni minimum (62% vs 59%).
Can ENiCrFe-2 Electrodes Weld 9% Nickel Cryogenic Steel for LNG Tanks?
Yes. ENiCrFe-2 is a standard consumable for SMAW of 9% Ni steel (ASTM A553 Type I) in LNG tank fabrication. The weld deposit delivers approximately 90 J Charpy impact at -196°C, exceeding typical cryogenic service requirements.
What is the maximum service temperature for Welds Made with ENiCrFe-2 Electrode?
ENiCrFe-2 weld deposits serve continuously up to 816°C (1500°F) in oxidising atmospheres. Above this, the 16% Cr may not provide sufficient long-term oxidation resistance. Consider ENiCrCoMo-1 (Alloy 617) or ENiCrFe-7 (Alloy 690) for higher-temperature applications.
Does Nicorex Alloys supply ENiCrFe-2 Electrodes with DNV, ABS, or TÜV Approval?
Yes. Nicorex Alloys sources ENiCrFe-2 from certified manufacturers with approvals including ABS, DNV, Bureau Veritas, Lloyds Register, TÜV, and KTA. Specify your required approval at the enquiry. Every batch ships with MTC 3.1 per EN 10204.
When not to use ENiCrFe-2 Welding Electrode?
Avoid ENiCrFe-2 in highly aggressive chloride environments (concentrated HCl, hot seawater, FGD with >1000 ppm Cl⁻). Its 1.9% Mo is insufficient for severe pitting; use ENiCrMo-3 (~9% Mo) or ENiCrMo-4 (~16% Mo) instead. Do not use it to match high-Mo base metals such as Inconel 625 or Hastelloy C-276. It does not support vertical-down welding. For simple carbon-to-stainless dissimilar joints below 300°C, E309L-16 is more cost-effective.