In a sweltering Gulf of Mexico offshore platform, where sulfidation devoured turbine components at 900°C and unplanned shutdowns cost millions daily, engineers turned to Haynes® 25 Plates (UNS R30605). This cobalt-based powerhouse slashed replacement cycles by 40% compared to Alloy 188, delivering unmatched high-temperature strength and sulfidation resistance that kept operations humming through harsh gas streams. Procurement heads in oil & gas now demand it for downhole tools, while marine fabricators specify AMS 5537 plates for exhaust structures enduring seawater corrosion and heat .
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Haynes® 25 (L-605, 2.4964) outperforms standard cobalt alloys like Alloy 188 in galling resistance showing just 0.17 mils wear depth at 9,000 lbs load versus 3.65 mils for 188 making it ideal for valve components and seals under high stress . Unlike nickel-heavy alternatives prone to carburization failure above 800°C, Haynes 25 maintains tensile strength over 862 MPa at room temperature, dropping to only 120 MPa at 816°C, with oxidation resistance to 980°C . This positions it as the go-to for chemical reactors, power generation heat exchangers, and pharma sterilization gear where lesser plates embrittle or gall prematurely.
For OEM manufacturers and hardware stores, Haynes 25 plates offer fabricability superior to brittle superalloys: cold workable up to 25% reduction while retaining 48 HRC hardness at elevated temps . In land-based gas turbines, high-temperature sulfidation resistant Alloy 25 plates endure AR-5% H2S environments at 760°C with minimal degradation, outlasting competitors by factors of 2-3x in lifecycle tests . Aurico Alloys LLP, trusted supplier, manufacturer, and stockist of Haynes® 25 Plates, provides affordable, authentic stock with MTC 3.1 for chemical, oil & gas, marine, pharma, power, and industrial supply needs exporters from India to global platforms .
Stats underscore its edge: At 1800°F, Haynes 25 sheet boasts 100-hour stress-rupture strength of 7000 psi, enabling thinner designs that cut material costs 15-20% over Inconel alternatives without sacrificing safety. Haynes 25 plate suppliers in Mumbai like Aurico deliver for gas turbine combustion liners, afterburner parts, and aircraft engine turbine blades/nozzle guide vanes per AMS 5537 . Galling resistant Haynes 25 plates excel in oilfield downhole tools and valve components, while marine grade stock in Mumbai supports high-heat turbine exhaust structures .
High-quality Haynes® 25 Plates ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP - Haynes 25 plate suppliers in Mumbai |
|---|---|
| Grade | Haynes 25 (UNS R30605, L-605) |
| Standards | AMS 5537 (sheet, plate and strip) |
| Sour service | NACE MR0175 / ISO 15156, listed for HAYNES® 25 alloy by Haynes International – see alloys for sour service |
| Thickness Range | 4.75 mm – 150 mm |
| Width/Length | Up to 48" width, 2500–12500mm length |
| Finish | Hot rolled, cold rolled, annealed, custom cut-to-size |
| Delivery | Stock, MTC 3.1, RoHS, export packing worldwide |
| 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 stocks Haynes 25 plates as leading Haynes 25 plate stockists in Mumbai: thicknesses 4.75–150mm, widths to 48", lengths to 12m, ready for gas turbines, oilfield tools, marine platforms, chemical plants, pharma instruments, power reactors. Custom cut-to-size Haynes 25 plates with verified Mill Test Certificates (MTC) 3.1 for global export .
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 & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | ≥862 |
| Yield Strength 0.2% (MPa) | ≥310 |
| Elongation (%) | ≥30 |
| Hardness (BHN) | 250 max |
| Max Service Temp (°C) | 980 (prolonged) |
| Galling Wear (9k lbs, mils) | 0.17 |
Applications & Benefits
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.
- Oil, Gas & Marine: Galling resistant Haynes 25 plates for oilfield downhole tools, valve components; Haynes 25 plate exporters in Mumbai for offshore drilling, subsea platforms, seawater-exposed turbine parts .
- Power Generation: AMS 5537 Haynes 25 plates for aircraft engine turbine blades, nozzle guide vanes, combustion liners; high-temperature sulfidation resistant for land-based gas turbines .
- Chemical/Pharma: L-605 cobalt alloy plates for refinery heaters, reactors; biocompatible for pharma/medical instruments, heat exchanger baffles .
- Industrial: Haynes 25 plate price per kg in Mumbai for furnace muffles, liners; Haynes 25 vs Alloy 188 superior oxidation in non-magnetic high-temp apps .
- Supply Chain: Corrosion resistant Haynes 25 sheets for India OEMs/hardware stores with custom sizing, MTC .
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 Plates from Aurico Alloys LLP provide procurement heads, engineers, and fabricators with AMS 5537-certified resilience against sulfidation, galling, and 980°C oxidation delivering 40% longer life and cost savings over inferior alloys in demanding sectors . Are your high-stress assets ready for Haynes 25 performance?