ERNiCrMo-15 is a nickel-chromium-molybdenum alloy welding wire designed for joining age-hardenable nickel alloys such as Inconel® 725 (UNS N07725) and Inconel® 625LCF. This filler metal offers exceptional strength when post-weld heat treated (age hardened), combined with good resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-containing environments.
ERNiCrMo-15 is widely used in oil and gas production (subsea equipment, wellhead components), offshore platforms, chemical processing, marine engineering, nuclear power, and high-performance aerospace applications where high strength and corrosion resistance are required. The wire delivers smooth arc characteristics, low spatter, and stable metal transfer, enabling fabricators to achieve consistent weld quality on demanding projects.
ERNiCrMo-15
| Standard | Classification |
|---|---|
| AWS A5.14 | ERNiCrMo-15 (UNS N07725) |
| ASME II, Part C, SFA-5.14 | ERNiCrMo-15 (UNS N07725) |
| EN ISO 18274 | SNi7725 (NiCr21Mo8Nb3Ti) |
Custom specifications available upon request.
For information regarding certifications and industry approvals, please contact our Technical Department.
| Element | Ni+Co | C | Mn | Fe | S | Si | Al |
|---|---|---|---|---|---|---|---|
| Content (%) | 55.0 – 59.0 | 0.03 max | 0.35 max | Remainder | 0.01 max | 0.20 max | 0.35 max |
| Element | Ti | Cr | Nb+Ta | Mo | P | Others (each) | |
| Content (%) | 1.0 – 1.7 | 19.0 – 22.5 | 2.75 – 4.00 | 7.0 – 9.5 | 0.015 max | 0.50 max total |
The balanced nickel-chromium-molybdenum composition with titanium and niobium additions allows age hardening to very high strength levels while maintaining excellent weldability and corrosion resistance.
| Property | Value (Age Hardened Condition) |
|---|---|
| Tensile Strength, psi | 174,000 |
| Tensile Strength, MPa | 1,200 |
| Heat Treatment | 1900°F (1038°C) / 1 hour + 1350°F (732°C) / 8 hours, Furnace Cool to 1150°F (621°C) / 8 hours, Air Cool |
Ø Age-hardenable via precipitation of Ni₃(Nb, Ti, Al) phases, achieving tensile strength up to 1200 MPa (174 ksi) after proper heat treatment
Ø Excellent resistance to pitting, crevice corrosion, and chloride ion stress corrosion cracking
Ø Good resistance to sour gas environments (H₂S) for oil and gas applications
Ø Low carbon content minimizes intergranular carbide precipitation
Ø Excellent weldability with TIG (GTAW) and MIG (GMAW) processes
Ø Smooth arc characteristics and low spatter for high-quality weld deposits
| Category | Details |
|---|---|
| Base Materials | Inconel® 725 (UNS N07725), Inconel® 625LCF, other age-hardenable nickel-chromium-molybdenum alloys, and dissimilar joints with high-strength stainless steels or low-alloy steels |
| Industrial Applications | Subsea oil and gas equipment (wellhead connectors, Christmas trees, manifolds), offshore platform components, chemical processing reactors, nuclear reactor internals, marine propulsion shafts, high-strength pressure vessels, aerospace fasteners and structural parts |
| Service Environment | Sour gas (H₂S), seawater, chloride-containing solutions, high-pressure high-temperature (HPHT) oil & gas environments, oxidizing and reducing acid media |
| Welding Process | TIG (GTAW), MIG (GMAW) |
| Shielding Gas | Pure Argon (TIG); Ar/He mixtures (MIG) |
| Available Form | Bare wire, spool wire, TIG cut lengths |
Diameter options:
Packaging:
Ø Reliable production quality meeting AWS A5.14 and ASME SFA-5.14 requirements
Ø Strict quality control for age-hardenable nickel alloy wires
Ø Clean wire surface for smooth feeding and stable arc
Ø Global export experience with on-time delivery
Ø Technical support for welding procedure qualification and post-weld heat treatment
1. What is ERNiCrMo-15 welding wire used for?
ERNiCrMo-15 is primarily used for welding Inconel® 725 (UNS N07725), Inconel® 625LCF, and other age-hardenable nickel-chromium-molybdenum alloys. It is ideal for high-strength applications in oil & gas, offshore, nuclear, and chemical processing industries.
2. What is the typical strength after heat treatment?
After the specified age-hardening heat treatment (1900°F + 1350°F + 1150°F furnace/air cool), the all-weld metal can achieve a tensile strength of approximately 174,000 psi (1200 MPa).
3. What corrosion resistance does ERNiCrMo-15 provide?
It offers excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. It is also suitable for sour gas (H₂S) environments in oil and gas production.
4. What are the recommended post-weld heat treatment parameters?
The typical age-hardening cycle is: solution anneal at 1900°F (1038°C) for 1 hour, then age at 1350°F (732°C) for 8 hours, furnace cool to 1150°F (621°C) for 8 hours, then air cool. Always qualify the procedure for your specific application.
5. Which welding processes are recommended?
TIG (GTAW) and MIG (GMAW) are both suitable. Use pure argon for TIG welding; argon-helium mixtures are preferred for MIG.
Contact our technical team for alloy selection support, product datasheets, post-weld heat treatment procedures, or a customized quotation for your project.
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