During qualification testing of a next-generation military afterburner nozzle, conventional nickel alloys suffered catastrophic oxidation blistering and sulfidation attack at 980°C, failing MIL-STD thermal cycling requirements after only 500 hours. The breakthrough was Haynes® 25 Sheets (UNS R30605, L-605) – a cobalt-nickel-chromium-tungsten superalloy that exceeded 2000-hour life with 125 ksi tensile strength retention, 30% elongation, and superior galling resistance, becoming the aerospace standard for combustors, turbine shrouds, and bearing sleeves.
Table of Contents
For procurement heads, engineers, fabricators, and OEM manufacturers in chemical processing, oil & gas, marine propulsion, pharmaceutical equipment, and power generation, Haynes 25 delivers cobalt-based performance unmatched by nickel alloys like Nimonic 75. With 100-hour stress-rupture strength of 7000 psi at 1800°F and exceptional resistance to metal galling (0.17 mils wear at 6000 lbs load), it excels where wear, sulfidation, and thermal fatigue challenge standard HR 203 Nimonic 75 sheet applications.
Aurico Alloys LLP is your premier Haynes® 25 Sheets supplier, stockist, and exporter in India to abroad markets. We provide affordable, authentic AMS 5537-certified material with Haynes 25 ready stock India, competitive UNS R30605 sheet price, and precision Haynes 25 sheet cut to size services for combustor liners, turbine shrouds, and high-wear industrial components.
High-quality Haynes® 25 Sheets ready for industrial use.
Specification Overview
| Supplier | Aurico Alloys LLP – Haynes 25 sheets supplier/export |
|---|---|
| Grade | Haynes® 25 (UNS R30605, L-605) |
| Standards | AMS 5537 (sheet, plate and strip); ASTM F90 / ISO 5832-5 for implant-grade wrought material |
| Thickness Range | 0.2-12mm (Haynes 25 sheet cut to size) |
| Max Service Temp | 980°C continuous |
| Price | INR 5,000 – 15,000 per kg. Indicative USD 60 – 175 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | R30605 |
| Werkstoff / EN number | 2.4964 |
| EN designation | CoCr20W15Ni |
| Density | 9.07 g/cm3 |
| Melting range | 1330-1410 °C |
| Electrical resistivity | 88.6 µΩ·cm |
| Thermal diffusivity | 0.0283 cm²/s |
| Thermal conductivity (25 °C) | 10.5 W/m·°C |
| Specific heat (25 °C) | 403 J/kg·°C |
| Coefficient of expansion (25-100 °C) | 12.8 µm/m·°C |
| Dynamic modulus of elasticity | 225 GPa |
| Plate, sheet and strip specification | AMS 5537 |
Identifiers and physical constants for Haynes 25. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP offers competitive Haynes 25 price per kg with extensive Haynes 25 ready stock India for aerospace combustors and industrial galling applications.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.05 | 0.15 |
| Silicon (Si) | — | 0.40 |
| Manganese (Mn) | 1.00 | 2.00 |
| Phosphorus (P) | — | 0.040 |
| Sulfur (S) | — | 0.030 |
| Chromium (Cr) | 19.00 | 21.00 |
| Nickel (Ni) | 9.00 | 11.00 |
| Tungsten (W) | 14.00 | 16.00 |
| Cobalt (Co) | — | Balance |
| Iron (Fe) | — | 3.00 |
Composition limits for Haynes 25. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical Properties
| Condition | Tensile (ksi) | Yield (ksi) | Elong. (%) |
|---|---|---|---|
| Annealed Sheet | 125 | 45 | 30 |
| 1800°F/100h Rupture | 7.0 ksi | - | - |
| Galling 6000 lbs | 0.17 mils wear | - | - |
| Cavitation 96h | 4.5 mils erosion | - | - |
Applications & Superiority vs Nimonic 75
Why this grade
Haynes® 25, also known as L-605, is a cobalt-nickel-chromium-tungsten alloy with high strength to about 980°C. What separates it from the nickel-base grades is wear and galling resistance, so it is specified for turbine vanes and combustor parts that also see rubbing contact, for bearings and bushings, and for surgical implants.
- Chemical: Sulfidation-resistant furnace muffles, carburizing baskets – superior to nickel alloys
- Oil & Gas: Gas turbine nozzle guide vanes, combustor liners enduring thermal fatigue
- Marine: Afterburner components, bearing sleeves with galling resistance
- Pharma: High-temperature kiln trays maintaining clean surfaces
- Power: Industrial turbine shrouds, flame holders to 980°C
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Haynes® 25 sheets from Aurico Alloys LLP deliver AMS 5537-certified cobalt superalloy performance with unmatched 980°C strength, galling resistance, and sulfidation protection for your most demanding turbine combustors, shrouds, and wear components. Are your high-temperature rotating and static parts protected by the cobalt alloy standard that outperforms nickel alternatives in galling and sulfidation?