AWS Class ER410NiMo MIG & TIG
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ER410NiMo MIG & TIG Welding Wire Supplier in Mumbai, India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified importer, stockist, and supplier of ER410NiMo MIG and TIG welding wire based in Mumbai, India. We supply this nickel-molybdenum-modified martensitic stainless filler wire classified under AWS A5.9 / ASME SFA 5.9,
ER410NiMo (UNS S41086) is a special type of martensitic stainless steel welding material made with a careful mix of chemicals to ensure it has the right strength and resistance to corrosion for CA6NM castings. This alloy is a metallic substance composed of two or more elements, typically a base metal and specific alloying agents. It offers excellent fluidity in the weld pool, stable arc performance, and a controlled cooling process, which helps achieve consistent bonding and bead shape when building up thick sections. This alloy is the filler metal that restores original performance. The wire contains 12% Cr, 4.0-5.0% Ni, 0.4-0.7% Mo, and C limited to 0.06% max. The added nickel suppresses delta-ferrite, lowers the ductile-to-brittle transition temperature, and creates a soft martensite + retained austenite microstructure with 3-5× high Charpy impact toughness. Molybdenum adds pitting resistance and protection against sulphide-induced stress corrosion cracking. Typical tensile strength after PWHT at 595-620°C (1100-1150°F) reaches 760-900 MPa (110-130 ksi) with 15-20% elongation.
ER410NiMo is the standard filler for welding and repairing CA6NM (13Cr-4Ni) castings in hydro turbine runners, pump casings, propeller shafts, and oil and gas components. Available as TIG rods (1.6-4.0 mm) and MIG spools (0.8-1.6 mm), every shipment carries EN 10204/3.1B mill test certificates.
ER410NiMo Welding Wire Specifications
The following table provides a detailed overview of ER410NiMo welding wire specifications, covering classification, UNS Designation, and welding details:
| AWS Classification | ER410NiMo as per AWS A5.9 / ASME SFA 5.9 |
|---|---|
| UNS Designation | S41086 |
| Welding Processes | GTAW (TIG), GMAW (MIG), SAW |
| Polarity – GTAW / GMAW | DCEN / DCEP |
| Shielding Gas – GTAW / GMAW | 100% Argon / Ar + 1-2% O₂ |
| TIG Rod Diameters | 1.6, 2.0, 2.4, 3.2, 4.0 mm |
| MIG Wire Diameters | 0.8, 0.9, 1.0, 1.2, 1.6 mm |
| TIG Rod Length | 915 mm (36″) or 1000 mm (39″) |
AWS Classification Explained: What Does ER410NiMo Mean?
Referring to the following table will help to understand how ER and NiMo specifications influence the microstructure and toughness of weld deposits.
| Component | Meaning & Specification | Key Benefit |
|---|---|---|
| ER | Electrode/Rod: Bare solid wire per AWS A5. 9. | Identifies the filler for GMAW (MIG) or GTAW (TIG) processes. |
| NiMo | 4.0-5.0% Ni and 0.4-0.7% Mo modification. | Suppresses delta-ferrite to create a tough, soft martensitic microstructure. |
| 410 | 11.5-13.5% Cr (Chromium) straight martensitic grade. | Provides high hardness and corrosion resistance; ideal for surfacing and steam turbine parts. |
Weld Deposit Chemical Composition of ER410NiMo
See this table for the full chemical breakdown of ER410NiMo weld deposits, including all nickel and molybdenum content details.
| Material / Element | Carbon (C) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulphur (S) | Copper (Cu) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|---|
| AWS A5.9 Range | 0.06% max | 11.0-12.5% | 4.0-5.0% | 0.4-0.7% | 0.60% max | 0.50% max | 0.03% max | 0.03% max | 0.75% max | Balance |
Nickel at 4-5% separates ER410NiMo from ER410 (0.60% Ni max), suppressing delta-ferrite and stabilising retained austenite for sub-zero toughness. Molybdenum at 0.4-0.7% adds pitting resistance in chloride-bearing water and sulfide SCC resistance.
All-Weld-Metal Mechanical Properties of ER410NiMo
The following table provides the mechanical property specifications for ER410NiMo all-weld metal after post-weld heat treatment.
| Property | Tensile Strength | Yield Strength (0.2%) | Elongation | Charpy Impact (RT) |
|---|---|---|---|---|
| Typical Value | 760-900 MPa (110-130 ksi) | 620-690 MPa (90-100 ksi) | 15-20% | 40-80 J |
Below 595°C, tempering is insufficient. Above 620°C, re-hardening from fresh martensite reduces ductility and toughness.
Base Metal Compatibility & P-Number Matrix for ER410NiMo
Refer to the table below for the corresponding P-Number classifications and ER410NiMo base metal compatibility for the purpose of qualifying the weld procedure.
| Base Metal | ASTM Grades | ASME P-No. |
|---|---|---|
| CA6NM (13Cr-4Ni) | A352 CA6NM, A743 CA6NM, A487 CA6NM | P-6 Group 4 |
| 410 | A240, A268 TP410, A182 F6a, A217 CA-15 | P-6 Group 1/2/3 |
| 405 / 410S | A240, A268 | P-7 Group 1 |
Primary use is CA6NM hydro turbine runner repair, pump casing fabrication, propeller shaft welding, and cavitation damage restoration.
Recommended Welding Parameters for ER410NiMo Filler Wire
Refer to the following table for the optimal welding parameters and technical settings required for ER410NiMo filler metal application.
| Diameter | Current (A) | Voltage (V) |
|---|---|---|
| 1.6 mm | 60-120 | 11-15 |
| 2.4 mm | 100-170 | 12-17 |
| 3.2 mm | 150-220 | 13-18 |
GMAW (MIG) parameters using DCEP and Ar + 1-2% O₂:
| Diameter | Current (A) | Voltage (V) |
|---|---|---|
| 0.9 mm (Short Circuit) | 60-130 | 17-21 |
| 1.2 mm (Spray) | 180-260 | 26-31 |
Mandatory protocol: preheat to 150°C (300°F) minimum, maintain interpass at ≥150°C, slow-cool to ~65°C for martensite transformation, then PWHT at 595-620°C (1100-1150°F) for 1 hr per 25 mm.
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Industrial Welding Applications of ER410NiMo TIG & MIG Wire
The following are industrial applications of ER410NiMo
- Hydroelectric Power: Attach turbine runners and guide vanes with this to prevent water erosion. It preserves strength, ensuring your project remains durable even under heavy, constant pressure
- Pump Manufacturing: Engineers specify the seawater and desalination pump filler metal. It resists corrosion in harsh environments, keeping high-performance impellers and pump casings intact.
- Marine & Naval: It is used for propeller shafts and rudders of ships, owing to its ability to resist the harsh underwater environment.
- Oil & Gas: Underwater pumps and valves: It is suitable for sour service, keeping field chemicals away from internal parts.
- Power Generation: Maintenance teams use this wire to maintain the steam turbine and pump casings. It prevents nuclear or fossil-fuel reactors from failing even at high temperatures.
- Water Treatment: Municipal water infrastructure relies on this alloy to keep pump impellers and valve components corrosion-free and sturdy for long-term service.
Storage and Handling of ER410NiMo Welding Filler Wire
ER410NiMo is a solid bare wire, so it does not absorb moisture. The soft martensitic deposit is susceptible to hydrogen cold cracking. Store in original sealed packaging at 15-30°C, below 60% RH. Keep it separated from carbon steel tooling. Degrease the base metal with acetone within 25 mm of the joint. For turbine repairs in humid environments, extra moisture control is critical.
Available Forms, Diameters and Packaging of ER410NiMo Wire
Consult the following table for detailed available forms, standard diameters, and packaging specifications for ER410NiMo filler wire and electrodes.
| Form | Diameters | Packaging |
|---|---|---|
| TIG Rod (GTAW) | 1.6, 2.0, 2.4, 3.2, 4.0 mm | 915/1000 mm tubes, 5 kg packs |
| MIG Wire (GMAW) | 0.8, 0.9, 1.0, 1.2, 1.6 mm | 15 kg spools |
| SAW Wire | 1.6, 2.4, 3.2 mm | 25 kg coils |
| SMAW Electrode (companion) | E410NiMo-16: 2.5, 3.2, 4.0 mm | Hermetically sealed cans (2.5, 5 kg) |
All wire ships with MTC 3.1 per EN 10204.
How to Order ER410NiMo Welding Wire from Nicorex Alloys
To place an order for ER410NiMo Welding Wire from Nicorex Alloys, please submit the following 9 details:
- AWS Classification: ER410NiMo per AWS A5.9 / ASME SFA-5.9
- Diameter: GTAW: 1.6 mm / 2.4 mm / 3.2 mm; GMAW: 0.9 mm / 1.2 mm
- Quantity: GTAW: specify kg or packs; GMAW: specify spool count
- Testing / Certification: MTC 3.1/3.2; Hardness Report; PWHT record; TPI
- Base Metal: UNS S41500 / CA6NM castings or similar Material Grade: UNS S41526; W.Nr. 1.4313; EN ISO 14343-A: W 13 4
- Third-Party Approvals: BV / DNV / Lloyd's / BHEL / NHPC / SJVN / NTPC / THDC - specify
- Applicable Code: ASME VIII, IX, B31.3 - specify
- Delivery: Domestic / International - specify port or address
- Remarks: Hydro turbine/pump casing - confirm CA6NM base metal; specify project
Nicorex Alloys stocks ER410NiMo for India’s hydroelectric and pump sectors. We also supply ER410 + E410-16 + E410NiMo-16 from the same manufacturer.
Frequently Asked Questions
Why must PWHT for ER410NiMo Not Exceed 620°C (1150°F)?
ER410NiMo produces a soft martensite + retained austenite microstructure. Retained austenite improves impact toughness and resistance to brittle fracture. On cooling above 620°C, austenite becomes fresh untempered martensite, increasing hardness and cutting toughness. No retained austenite means standard ER410 can be tempered at 675-760°C without concern.
What makes ER410NiMo Superior to ER410 for Hydro Turbine Runner Repair?
Metallurgical benefits make ER410NiMo superior to ER410 for hydro turbine runner repair. Toughness – Charpy impact values are 3-5 times greater, essential for runners subjected to water hammer and vibration. Cavitation resistance, which is a soft martensitic microstructure, absorbs the energy of collapsing cavitation bubbles more efficiently than brittle ER410.
What is CA6NM, and why is ER410NiMo its Matching Filler?
Cast martensitic stainless steel CA6NM meets ASTM A352/A743/A487. C = corrosion-resistant, A = 12% Cr class, 6 = 0.06% maximum C, N = Nickel, M = Molybdenum. The weld deposit of ER410NiMo (12% Cr, 4.5% Ni, 0.5% Mo, 0.06% C max) is metallurgically equal to the base casting since its chemistry matches the CA6NM standard.
Is ER410NiMo NACE MR0175 Compliant for Sour Service?
Yes. Heat-treated ER410NiMo deposits with hardness under 23 HRC can meet NACE MR0175/ISO 15156 for sour service.