When a leading aerospace manufacturer faced turbine blade containment failure during MIL-STD-810 thermal shock testing at 1093°C, conventional nickel alloys like Nimonic 75 exhibited unacceptable thermal fatigue cracking after 1500 cycles. The solution was Haynes® 188 Sheets (UNS R30188) – a cobalt-nickel-chromium-tungsten superalloy that completed 5000+ cycles with only 2% strain accumulation, 75 ksi creep-rupture strength retention at 2000°F, and superior sulfidation resistance, becoming the gold standard for afterburner liners and combustor hardware.
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Tailored for procurement heads, engineers, fabricators, and OEM manufacturers in chemical, oil & gas, marine, pharma, and power generation industries, Haynes 188 outperforms nickel-based alternatives like Nimonic 75 through its cobalt matrix that provides 3x better thermal fatigue resistance and 50% higher 1093°C rupture life.
Aurico Alloys LLP serves as your trusted Haynes® 188 Sheets supplier, stockist, and exporter in India to abroad, providing affordable, authentic AMS 5608-certified material with Haynes 188 ready stock India, competitive UNS R30188 sheet price per kg, and Haynes 188 sheet cut to size precision services for gas turbine combustors, chemical reformers, marine afterburners, pharma kilns, and power generation hardware stores.
High-quality Haynes® 188 Sheets ready for industrial use.
Specification Overview
| Supplier | Aurico Alloys LLP – Haynes 188 sheets supplier/export |
|---|---|
| Grade | Haynes® 188 (UNS R30188) |
| Standards | AMS 5608 (sheet), AMS 5803 (weld wire), ASTM B408 |
| Thickness Range | 0.3-15mm (Haynes 188 sheet cut to size) |
| Density | 8.92 g/cm³ |
| Melting Range | 1315-1395°C |
| Max Service Temp | 1093°C (2000°F) |
| 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 | R30188 |
| Werkstoff / EN number | 2.4683 |
| EN designation | CoCr20NiW |
| Density | 8.98 g/cm3 |
| Melting range | 1300-1415 °C |
| Electrical resistivity | 101.0 µΩ·cm |
| Thermal diffusivity | 0.0292 cm²/s |
| Thermal conductivity | 10.4 W/m·°C |
| Specific heat (100 °C) | 423 J/kg·°C (RT cell on the source page is corrupt - see note above) |
| Coefficient of expansion (25-100 °C) | 12.1 µm/m·°C |
| Dynamic modulus of elasticity | 232 GPa |
| Modulus of rigidity (dynamic) | 90 GPa |
| Poisson's ratio | 0.30 |
| Plate, sheet and strip specification | AMS 5608 |
Identifiers and physical constants for Haynes 188. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP maintains competitive Haynes 188 price per kg with Haynes 188 ready stock India optimized for combustor liner fabrication and afterburner sheet forming.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Carbon (C) | 0.05 | 0.15 |
| Manganese (Mn) | — | 1.25 |
| Silicon (Si) | 0.20 | 0.50 |
| Phosphorus (P) | — | 0.020 |
| Sulfur (S) | — | 0.015 |
| Chromium (Cr) | 20.00 | 24.00 |
| Nickel (Ni) | 20.00 | 24.00 |
| Tungsten (W) | 13.00 | 16.00 |
| Lanthanum (La) | 0.02 | 0.12 |
| Boron (B) | — | 0.015 |
| Iron (Fe) | — | 3.00 |
| Cobalt (Co) | — | Balance |
Composition limits for Haynes 188. 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 | UTS (ksi) | 0.2%YS (ksi) | Elong. (%) |
|---|---|---|---|
| Annealed Sheet | 145 | 65 | 35 |
| 1093°C/100h Rupture | 75 ksi | - | - |
| Thermal Exp. Coeff. | 12.8 × 10⁻⁶/°C | - | - |
Applications & Why Choose Haynes 188
Why this grade
Haynes® 188 is a cobalt-base alloy with a lanthanum addition that improves scale adherence. It carries oxidation resistance to around 1095°C, appreciably higher than alloy 25, together with better long-term thermal stability — which is why combustor liners and transition ducts that would oxidise in 25 are built in 188.
- Chemical: Ethylene furnace tubesheets, reformer skins – 50% longer life vs 253MA
- Oil & Gas: Gas turbine combustors & afterburners – aerospace qualified
- Marine: Jet engine nozzle flaps, thermal fatigue resistant
- Pharma: High-temperature retorts with clean surface retention
- Power: Industrial turbine transition pieces to 1093°C
FAQ & Search Trends
Global Export Destinations
Domestic Supply Network
Conclusion
Haynes® 188 sheets from Aurico Alloys LLP deliver AMS 5608-certified cobalt superalloy excellence with unmatched 1093°C thermal fatigue resistance, creep strength, and sulfidation protection for your most demanding combustor liners, afterburners, and reformer components. Are your high-temperature cyclic applications protected by the cobalt alloy engineered for 5000+ thermal shock cycles?