HAYNES® 25 Welding Wire
HAYNES® 25 Welding Wire (L-605 Cobalt Alloy) - TIG & MIG Filler Metal Supplier in India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified Mumbai-based supplier and stockist of HAYNES® 25 welding wire. We supply L-605 cobalt alloy welding consumables, the cobalt-based filler metal specified under AMS 5796 for TIG (GTAW) and MIG (GMAW) welding.
HAYNES 25, also designated Alloy L-605, Stellite 25, and HS-25 (UNS R30605), is a cobalt-nickel-chromium-tungsten filler metal with a nominal balance of Co 51%, Cr 20%, W 15%, and Ni 10%. HAYNES 25 welding wire produces a cobalt-based deposit that offers exceptional strength and resistance to oxidation, sulfidation, and galling for high-temperature joints exceeding 800°C. It is classified under AMS 5796 (bare wire/rod), AMS 5797 (coated electrode), ASTM F90, and ASME IX F-45. The weld deposit achieves a minimum tensile strength of 950 MPa (138 ksi) with 30% elongation, making it the strongest fabricable cobalt alloy filler available. Oxidation resistance holds to 980°C (1800°F) for prolonged service, backed by excellent sulfidation and galling resistance.
TIG rods range from 1.6 to 4.0 mm in 914 mm (36″) lengths; MIG spools range from 0.76 to 2.4 mm in diameter. HAYNES 25 wire serves aerospace gas turbines (military and commercial), land-based power turbines, nuclear reactor internals, medical implant fabrication (ASTM F90), and high-temperature wear components. Every shipment carries EN 10204/3.1B mill test certificates.
HAYNES 25, also designated Alloy L-605, Stellite 25, and HS-25 (UNS R30605), is a cobalt-nickel-chromium-tungsten filler metal with a nominal balance of Co 51%, Cr 20%, W 15%, and Ni 10%. HAYNES 25 welding wire produces a cobalt-based deposit that offers exceptional strength and resistance to oxidation, sulfidation, and galling for high-temperature joints exceeding 800°C. It is classified under AMS 5796 (bare wire/rod), AMS 5797 (coated electrode), ASTM F90, and ASME IX F-45. The weld deposit achieves a minimum tensile strength of 950 MPa (138 ksi) with 30% elongation, making it the strongest fabricable cobalt alloy filler available. Oxidation resistance holds to 980°C (1800°F) for prolonged service, backed by excellent sulfidation and galling resistance.
TIG rods range from 1.6 to 4.0 mm in 914 mm (36″) lengths; MIG spools range from 0.76 to 2.4 mm in diameter. HAYNES 25 wire serves aerospace gas turbines (military and commercial), land-based power turbines, nuclear reactor internals, medical implant fabrication (ASTM F90), and high-temperature wear components. Every shipment carries EN 10204/3.1B mill test certificates.
HAYNES 25 Welding Wire Specifications
The specification table below covers AMS 5796 (TIG/MIG wire) and AMS 5797 (SMAW electrode) requirements, along with standard sizes, welding parameters, and physical properties.
| Specification | TIG/MIG Wire | SMAW Electrode |
|---|---|---|
| AMS Specification | AMS 5796 | AMS 5797 |
| UNS Number | R30605 | W73605 |
| ASTM | ASTM F90 (bar/wire) | — |
| Welding Processes | GTAW (TIG), GMAW (MIG) | SMAW (Stick) |
| Polarity – TIG | DCEN (Electrode Negative) | — |
| Polarity – MIG / SMAW | DCEP (Electrode Positive) | DCEP |
| Shielding Gas | TIG: 100% Argon MIG: Argon or Ar/He blends |
N/A |
| TIG Rod Diameters | 1.6, 2.0, 2.4, 3.2, 4.0 mm | — |
| TIG Rod Length | 914 mm (36″) standard | — |
| MIG Wire Diameters | 0.76–2.4 mm | — |
| SMAW Electrode Diameters | — | 2.4, 3.2, 4.0 mm |
Submerged arc welding (SAW) is not recommended for HAYNES 25 due to high heat input and slow cooling rates that promote hot cracking. Interpass temperature must stay below 93°C (200°F).
Chemical Composition of HAYNES 25 (L-605) Weld Deposit (%)
HAYNES 25 weld deposits offer reliable heat strength. Refer to the table below for detailed chemical and performance specifications.
| Specification | Cobalt (Co) | Chromium (Cr) | Tungsten (W) | Nickel (Ni) | Iron (Fe) | Manganese (Mn) | Silicon (Si) | Carbon (C) | Phosphorus (P) | Sulfur (S) |
|---|---|---|---|---|---|---|---|---|---|---|
| AMS 5796 Requirement | Balance (~51%) | 19.0–21.0 | 14.0–16.0 | 9.0–11.0 | 3.0 max | 1.0–2.0 | 0.40 max | 0.05–0.15 | 0.04 max | 0.03 max |
| Typical | 51.0 | 20.0 | 15.0 | 10.0 | 1.5 | 1.5 | 0.3 | 0.10 | 0.01 | 0.005 |
Carbon content in cobalt-based superalloy fillers (0.05-0.15%) is higher than in nickel-based fillers (ERNiCrMo-4, ≤0.02%). Adding carbon to cobalt alloys produces M₆C and M₂₃C₆ carbides, which improve strength at high temperatures. Manganese fluidises and deoxidises weld pools at 1.0–2.0%.
All-Weld-Metal Mechanical Properties of HAYNES 25 (L-605)
HAYNES 25 is a cobalt alloy built for strength. Refer to the table below for minimum mechanical properties.
| Specification | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness |
|---|---|---|---|---|
| AMS 5796 Requirement | 138,000 psi (950 MPa) | Typical ~65–69 ksi (448–476 MPa) | 30% minimum | ~250 BHN (typical, ≤275 BHN) |
HAYNES 25 retains useful strength to 1175°C (2150°F). Base metal typically has 517 MPa (75 ksi) tensile strength at 538°C (1000°F) and ~310 MPa (45 ksi) at 816°C (1500°F). HAYNES 25’s 40% minimum elongation is uncommon for a superalloy filler; it resists gas turbine thermal cycling stresses without breaking. The face-centred cubic (FCC) cobalt alloy HAYNES 25 has no ductile-to-brittle transition temperature.
Base Metal Compatibility for HAYNES 25 Welding Wire
The main L-605 base metal matching filler is HAYNES 25 wire. The following table shows all the details of the base metal
Similar Metal Joints (Primary Use):
| Base Metal (Similar Joint) | Applications |
|---|---|
| HAYNES 25 / L-605 (UNS R30605) | Gas turbine combustors, transition ducts, and afterburner parts |
Dissimilar Metal Joints:
| Joint Configuration | Recommended Filler | Reason |
|---|---|---|
| HAYNES 188 thick section (>9.5 mm) | HAYNES 230-W (ERNiCrWMo-1) | Better hot cracking resistance in thick cobalt welds |
| HAYNES 188 to nickel alloys | 230-W, 556, HASTELLOY S or W | Nickel-base transition compatibility |
| HAYNES 188 to iron-base alloys | 556 or HASTELLOY S | Multi-alloy metallurgical compatibility |
Recommended Welding Parameters for HAYNES 25 Filler Wire
Refer to this table for the recommended welding parameters to ensure optimal performance with HAYNES 25 filler wire.
| Joint Thickness | Tungsten Dia. | Filler Dia. | Current (A) | Voltage (V) |
|---|---|---|---|---|
| 0.8–1.6 mm | 1.6 mm | 1.6 mm | 15–60 | 9–12 |
| 1.6–3.2 mm | 1.6–2.4 mm | 1.6–2.4 mm | 50–100 | 9–12 |
| 3.2–6.4 mm | 2.4–3.2 mm | 2.4–3.2 mm | 75–150 | 10–13 |
| >6.4 mm | 2.4–3.2 mm | 2.4–3.2 mm | 100–200 | 10–13 |
Use DCEN with 100% argon (12 L/min / 25 cfh) and 2% thoriated tungsten. No preheat; keep interpass below 93°C (200°F). Clean each stringer bead and back-purge the root. Avoid SAW or oxy-acetylene. Anneal at 1175–1230°C (2150–2250°F), then cool rapidly.
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Industrial Applications of HAYNES 25 Welding Wire
The following are the industrial applications of HAYNES 25 Welding Wire
- Combustion cans, transition ducts, flame holders, afterburner assemblies, and nozzle diaphragms are welded and repaired with HAYNES 25 filler wire. Military and commercial engine programmes (CFM, GE, Pratt & Whitney) use L-605 filler for combustor fabrication and MRO overhaul.
- HAYNES 25 wire powers land-based gas turbine combustor liners, transition pieces and cross-fire tubes. Steam turbine parts exposed to high-temperature sulfidation conditions also use L-605 filler for both new fabrication and field repair welding.
- Springs, valve components, and structural elements in nuclear reactor internals use HAYNES 25 where radiation resistance, high-temperature strength, and long-term dimensional stability are required. L-605 is specified in various nuclear standards for these applications.
- Stents, heart valve components, and orthopaedic implants employ HAYNES 25 (ASTM F90). It is used to create implants with AMS 5796 welding wire
- Valve seats, seal rings, bearings, and metal-to-metal sliding surfaces in high-temperature equipment use HAYNES 25 weld overlay and buildup welding.
Storage & Handling of HAYNES 25 Welding Wire
HAYNES 25 is a solid wire (not flux-cored), so moisture absorption is not a concern.Surface contamination is a major risk, as trace sulfur or lead on the wire can cause hot cracking in sensitive cobalt alloy welds.
Store in a clean, dry area away from machining oils, cutting fluids, paint, galvanised materials, and copper tooling. Handle with clean, lint-free gloves. Maintain sealed TIG rod tubes. Cover MIG wire spools when not welding. Before welding, acetone-degrease the base metal and filler and remove oxide within 25 mm of the connection. After opening, AMS 5797 SMAW electrodes need 120–200°C heated-oven storage.
Available Forms, Diameters & Packaging of HAYNES 25 Welding Wire
Please provide the following details to procure Haynes 25 welding wires:
| Form | Diameters | Length / Packaging |
|---|---|---|
| TIG Rod (GTAW) | 1.6, 2.0, 2.4, 3.2, 4.0 mm | 914 mm (36″) tubes, 5 kg packs |
| MIG Wire (GMAW) | 0.76, 0.80, 0.89, 1.0, 1.1, 1.2, 1.6, 2.0, 2.4 mm | 15 kg spools, 12.5 kg reels |
| SMAW Electrode (AMS 5797) | 2.4, 3.2, 4.0 mm | Hermetically sealed cans |
Sizes 3.2 mm and above are not available in MIG spools. Sizes 4.0 mm and above are not available on reels.
How to Order HAYNES 188 Welding Wire from Nicorex Alloys
To order HAYNES 188 welding wire, provide Nicorex Alloys with the following 10 details:
- Wire Type - GTAW / GMAW Solid Wire for Cobalt-Base Superalloy Welding (Haynes 25 / L605)
- Size — 1.2mm (GMAW spools) / 1.6mm / 2.4mm / 3.2mm (GTAW cut lengths, 914mm) — specify form
- Current Type — DCEN (GTAW) / DCEP (GMAW) — specify process and diameter
- Welding Position — All Positions — specify process (GTAW / GMAW) and positional requirements
- Material Grade — Cobalt-Ni-Cr-W Alloy / UNS R30605 / AMS 5796 / AWS A5.14
- Quantity — Number of spools/packs or total weight in kg
- Standard — AWS A5.14 / ASME SFA 5.14, AMS 5796, EN ISO 18274, ASME Section IX
- Documentation — MTC EN 10204 3.1/3.2, PMI Report, Weld Metal Composition Report, Mechanical Properties Report, TPI Certificate
- Packaging — Vacuum-sealed foil bag with silica gel desiccant, ISPM 15-compliant export cartons with full labelling
- Delivery Destination — Domestic / International (specify port of discharge or delivery address)
Frequently Asked Questions
What is the Price of HAYNES 25 (L-605) Welding Wire per kg in India?
HAYNES 25 welding wire typically ranges from ₹8,000 to ₹15,000 per kg in India, dependent on product type , diameter, melt specification , and order quantity. Contact Nicorex Alloys about pricing.
What is the Difference Between HAYNES 25 and HAYNES 188 Welding Wire?
HAYNES 188 has 0.03–0.12% lanthanum, improving oxidation resistance (to 1095°C vs. 980°C for HAYNES 25) and intermediate-temperature stability. HAYNES 25 is stronger (TS 950 MPa minimum vs. ~900 MPa for 188) and has better wear/galling resistance even though both cobalt-base superalloys have equal Cr and W Haynes 188 has 22% nickel, not 10%. Above 980°C, use HAYNES 188. For durability, use HAYNES 25 below 980°C.
Does HAYNES 25 Welding Wire Require Preheat or Post-Weld Heat Treatment?
Preheating not needed. welding at room temp. For most usage, PWHT is unnecessary. For best qualities, solution-anneal hot- or cold-worked HAYNES 25 components at 1175–1230°C (2150–2250°F) and cool. Avoid stress relief at 600-800°C because Co-W Laves phase precipitation lowers room-temperature ductility.
What Industries Typically Procure HAYNES 25 (L-605) Welding Wire?
Aerospace is the main use. Military and commercial gas turbine engine manufacturers and MRO shops use it. Gas turbine operators on land fix the combustor with HAYNES 25. Medical device makers buy ASTM F90-grade L-605 wire for stents and implants. Nuclear component and high-temperature valve internal manufacturers buy.
When Not to Use HAYNES 25 (L-605) Welding Wire
HAYNES 25 is not suitable for aqueous corrosion service. Unlike Hastelloy C-276 or Inconel 625, it was not designed for corrosive aqueous media. For chemical processing, specify ERNiCrMo-4 (C-276) or ERNiCrMo-3 (Alloy 625) instead.
HAYNES 25 should not be used for prolonged intermediate-temperature service (600–800°C). Extended exposure causes Co₂W Laves phase precipitation, reducing room-temperature ductility. HAYNES 188 performs better in this range.
HAYNES 25 should not be welded by SAW. High heat input promotes hot cracking. Use GTAW for critical joints and GMAW for production welding. If stress relief is needed, a full solution anneal at 1175–1230°C with rapid cooling is the only acceptable route.