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ERNiCrMo-3 Inconel 625 SAW & Flux Supplier in Mumbai, India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified supplier and stockist of ERNiCrMo-3 SAW wire and flux in Mumbai, India. This nickel-chromium-molybdenum submerged arc welding consumable is classified under AWS A5.14 / ASME SFA-5.14 and has the UNS designation N06625.
ERNiCrMo-3 is a solid bare wire electrode for submerged arc welding (SAW) and corrosion-resistant alloy (CRA) cladding of nickel-chromium-molybdenum base metals and carbon steel substrates. Weld deposits match the Alloy 625 (Ni-Cr-Mo-Nb) system, delivering strong resistance to pitting, crevice corrosion, and chloride stress-corrosion cracking from cryogenic temperatures to 538°C (1000°F). The wire pairs with a compatible granular flux for SAW operations, which is the flux blanket that shields the molten Ni-Cr-Mo weld pool from atmospheric contamination, refines deposit chemistry, and controls bead profile. We supply these wires with manufacturer-matched flux as a pre-qualified pairing with EN 10204-3.1 MTC and full heat-lot traceability. Chromium at 20–23% and molybdenum at 8–10% give the deposit pitting and crevice corrosion resistance in chloride and acid service. Niobium at 3.15–4.15% provides precipitation strengthening and prevents sensitisation, removing the need for post-weld heat treatment.
The diameters of SAW wire range from 2.0 to 4.0 millimetres, and it is offered in coils and drums for distribution. Some of the industries that make extensive use of it are the oil and gas industry (offshore CRA overlay according to NACE MR0175), the chemical processing industry, the building of LNG cryogenic vessels, the power generation industry, and the pulp and paper industry.
ERNiCrMo-3 SAW Wire & Flux Specification
Refer to the following table for a comprehensive summary of the industrial standards and technical specifications for ERNiCrMo-3 SAW wire.
| AWS Classification | ERNiCrMo-3 per A5.14 |
|---|---|
| UNS Number | N06625 |
| Wire Form | Solid bare wire (continuous electrode for SAW) |
| Flux Type | Fluoride-basic or aluminate-basic (Ni-alloy grade) |
| Flux Standard | No standalone AWS classification – qualified as wire + flux system per ASME IX QW-404 |
| Dimensions | 2.0 to 4.0 millimetres |
What Does ERNiCrMo-3 Mean? - AWS A5.14 Classification Explained
Consult this table for a detailed breakdown of the AWS A5.14 alphanumeric classification system for this high-performance nickel alloy.
| Prefix | Meaning |
|---|---|
| E | Electrode – consumable filler for electric arc welding |
| R | Rod – also usable as rod for GTAW / oxy-fuel |
| Ni | Nickel-base alloy |
| Cr | Chromium is a principal alloying element |
| Mo | Molybdenum is a principal alloying element |
| –3 | Third alloy in the Ni-Cr-Mo group within AWS A5.14 |
The dual ER prefix means the wire is classified as an electrode (GMAW, SAW) and as a rod (GTAW). The 3 suffix separates this grade from ERNiCrMo-4 (Alloy C-276) and ERNiCrMo-1 (Alloy C-4).
Chemical Composition of ERNiCrMo-3 (AWS A5.14)
Please see the table below for the precise elemental percentages and specific chemical concentration limits required for ERNiCrMo-3 wire.
| Element | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Niobium + Tantalum (Nb+Ta) | Iron (Fe) | Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulphur (S) | Aluminium (Al) | Titanium (Ti) | Copper (Cu) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Weight % | 58.0 min (Balance) | 20.0–23.0 | 8.0–10.0 | 3.15–4.15 | 5.0 max | 0.10 max | 0.50 max | 0.50 max | 0.02 max | 0.015 max | 0.40 max | 0.40 max | 0.50 max |
Nb at 3.15–4.15% adds precipitation strengthening and prevents sensitisation, so no PWHT is needed. Low Fe (≤5%) maintains true nickel-base corrosion behaviour. In SAW, flux interaction can shift final Si and Mn levels – actual deposit chemistry is confirmed on the MTC.
Mechanical Properties of ERNiCrMo-3 Weld Deposit
Given below is the table for the typical tensile strength, yield strength, and elongation metrics of ERNiCrMo-3 deposits in the as-welded condition.
| Property | Ultimate Tensile Strength | Yield Strength (0.2% Offset) | Elongation | Hardness |
|---|---|---|---|---|
| Typical Value (As-Welded) | 110–120 ksi (760–827 MPa) | 60–75 ksi (415–517 MPa) | 30% min | ≈90 HRB (≈17–18 HRC) |
Hardness of ≈90 HRB converts to approximately 17–18 HRC – within the 22 HRC maximum required by NACE MR0175 for CRA overlay.
Base Metals Compatible with ERNiCrMo-3 SAW Wire
Review the following list for various nickel-based alloys and dissimilar steel combinations compatible with ERNiCrMo-3 submerged arc welding.
| Base Metal | Grade / UNS | ASME P-No. | Typical Application & Technical Notes |
|---|---|---|---|
| Inconel 625 | N06625 | P43 | Primary choice for matching-composition joints in offshore and aerospace sectors. |
| Inconel 601 | N06601 | P43 | High-temperature oxidation-resistant components for thermal processing. |
| Incoloy 825 | N08825 | P45 | Critical for chemical processing vessels requiring resistance to sulphuric and phosphoric acids. |
| Alloy C-276 | N10276 | P44 | Designed for severe corrosion environments, including wet chlorine gas and hypochlorites. |
| Monel 400 | N04400 | P42 | Specialized for dissimilar Ni-Cu to Ni-Cr-Mo joints in marine engineering. |
| 300-Series SS | S30400 / S31600 | P8 | Widely used for dissimilar joints and Corrosion Resistant Alloy (CRA) overlay. |
| Carbon Steel | P1 / Low-Alloy | P1 | Serving as the base material for CRA cladding, a primary SAW (Submerged Arc Welding) use case. |
| 9% Nickel Steel | ASTM A553 | P11A | Specifically engineered for LNG cryogenic vessel welding and low-temp storage. |
ERNiCrMo-3 is the standard filler for CRA weld overlay onto carbon steel per NACE MR0175 / ISO 15156 in sour service.
Recommended Parameters for ERNiCrMo-3 SAW Welding
The table below provides optimised current, voltage, and travel speed settings for achieving high-quality results with ERNiCrMo-3 wire.
| Diameter | Position | Wire Feed (ipm) | Current (A) | Voltage (V) | CTWD |
|---|---|---|---|---|---|
| 2.4 mm (3/32″) | Flat (Root Pass) | 150–180 | 250–280 A | 26–28 V | 25 mm |
| 2.4 mm (3/32″) | Flat (Fill Pass) | 190–220 | 300–350 A | 28–30 V | 25–30 mm |
| 2.4 mm (3/32″) | Flat (Capping) | 230–260 | 380–420 A | 30–31 V | 30 mm |
| 2.4 mm (3/32″) | Horizontal | 160–200 | 275–325 A | 27–29 V | 25–30 mm |
| 2.4 mm (3/32″) | High Deposition | 270–300 | 430–450 A | 31–32 V | 35 mm |
| 2.4 mm (3/32″) | Overlay / Clad | 180–210 | 290–340 A | 26–29 V | 30 mm |
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Industries and Applications of ERNiCrMo-3 SAW Wire & Flux
The following are the industrial applications for ERNiCrMo-3 SAW wire and flux
-
Oil and Gas (Offshore): CRA overlay on subsea manifolds, risers, and pipelines per NACE MR0175.
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Chemical Processing: Reactor vessels and heat exchangers in HCl, H₂SO₄, and HF service.
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Power Generation: Superheater tube overlays and HRSG components.
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Pulp and Paper: Digesters and bleach washers exposed to chloride-bearing liquors.
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LNG / Cryogenic: 9% nickel steel vessel welding for LNG storage tanks (ASTM A553).
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Petrochemical: FGD scrubber linings and wet flue gas condensate systems.
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Nuclear: Steam generator tube overlay where code-qualified.
Storage and Handling of ERNiCrMo-3 SAW Welding Flux
Nickel alloys are far more sensitive to hydrogen pickup than carbon steel. Proper storage is a weld quality requirement.
Flux: Store in original sealed containers at below 50% relative humidity. Use opened flux within the recommended window (typically 8–24 hours) or reseal immediately. Flux exposed beyond the allowed time must be rebaked. Discard any flux showing clumping or discolouration.
Wire: Store spools, coils, and drums in original vacuum-sealed packaging until use. Keep away from oil, grease, dust, and condensation. Handle with clean, dry gloves – bare-hand contact transfers salts that cause porosity.
Nicorex Alloys ships ERNiCrMo-3 SAW wire in vacuum-sealed packaging to prevent hydrogen pickup.
ERNiCrMo-3 SAW Wire Sizes & Packaging
Check the following data for the various wire diameters, spool sizes, and coil weights available for ERNiCrMo-3 SAW consumables.
| Form | Diameter | Packaging |
|---|---|---|
| SAW Wire | 2.0 mm (5/64″) | Coils: 12.5 kg, 25 kg |
| SAW Wire | 2.4 mm (3/32″) | Coils: 12.5 kg, 25 kg |
| SAW Wire | 3.2 mm (1/8″) | Drums: 100 kg, 250 kg |
| SAW Wire | 4.0 mm (5/32″) | Drums: 100 kg, 250 kg |
All packaging carries lot ID labels, EN 10204-3.1 MTC, and moisture-sealed protection.
How to Order ERNiCrMo-3 SAW Wire & Flux from Nicorex Alloys
Provide these 11 details for an accurate quotation of ERNiCrMo-3 SAW Wire & Flux from Nicorex Alloys
- AWS Classification and UNS - ERNiCrMo-3 / N06625
- Product Form - SAW wire, flux, or wire + flux combination
- Wire Diameter - 2.0, 2.4, 3.2, or 4.0 mm
- Flux Type and Grade - specify or request recommendation
- Packaging - spool, coil, or drum; weight and type
- Applicable Standard - AWS A5.14 / ASME SFA-5.14
- Base Metal Application - CRA overlay on CS, Alloy 625 joint, etc.
- Quantity - kg or number of packages
- Documentation - EN 10204-3.1 MTC, CoC, SDS, batch test certificate
- Additional Requirements - PMI, moisture-sealed packaging
- Delivery Destination - seaworthy export or domestic; city/port
Frequently Asked Questions
What is the Difference between ERNiCrMo-3 SAW Wire and ERNiCrMo-3 TIG/MIG Wire?
Both share the same composition per AWS A5.14. SAW uses granular flux shielding instead of gas, enabling higher deposition rates for thick sections and overlay.
Which SAW Welding Flux is Recommended for ERNiCrMo-3?
A fluoride-basic or aluminate-basic type formulated for nickel alloys. There is no separate AWS classification for Ni-alloy SAW flux; it is considered part of the wire and flux system according to ASME IX QW-404. Contact Nicorex for a matched recommendation.
Can ERNiCrMo-3 SAW be used for CRA Overlay on Carbon Steel?
Yes. CRA overlay with ERNiCrMo-3 on carbon steel is standard per NACE MR0175 / ISO 15156 for sour service environments.
What is the Maximum Interpass Temperature for ERNiCrMo-3 SAW?
150°C maximum is recommended. Exceeding this risks hot cracking and Nb/Mo precipitation.
What Documentation does Nicorex provide with ERNiCrMo-3 SAW Wire?
Every shipment includes an EN 10204-3.1 mill test certificate, a Certificate of Conformance, an SDS, and a batch test certificate as standard.