Haynes 188 Plate is a cobalt-nickel-chromium alloy known for high heat strength and oxidation resistance. It’s ideal for extreme heat environments like gas turbines and aerospace. Parag Metal is a trusted Haynes 188 Plate stockist with ready stock and quick delivery. The plate offers excellent mechanical strength and maintains performance even at 2000°F. It includes elements like cobalt, nickel, chromium, and tungsten. It also has strong physical properties like high thermal stability and good weldability.
This alloy 188 plate works well in industries that demand high-temperature performance. It is resistant to carburization, thermal fatigue, and corrosion. You can find it in afterburner components, combustion liners, and jet engines. It is also utilized in heat exchangers and industrial furnaces. We supply Haynes 188 Plates in various thicknesses and sizes to suit different projects.
Table of Content

Our plates meet ASME and ASTM requirements. In the power and aviation industries, grades like AMS 5608, and AMS 5609 are reliable. Each plate is clearly marked and meets the required durability and performance
With each purchase, we provide complete test certificates. It consists of heat treatment data, mechanical test results and chemical analyses. This gives buyers confidence in the quality and traceability of each Haynes 188 Plate.
Excellent resistance to oxidation and corrosion at high temperatures.
Maintains strength and hardness in extreme thermal conditions.
Exceptional creep resistance, ideal for prolonged high-temperature applications.
Good thermal fatigue resistance, minimizing cracking under temperature cycling.
High ductility and toughness, allowing for easier fabrication.
Stable microstructure, ensuring consistent performance over time.
Resistant to sulfidation and carburization in aggressive environments.
Widely applied in aerospace engines for hot section parts.
Suitable for chemical processing equipment handling corrosive, high-temperature fluids.
Common in furnace hardware and heat exchangers for thermal stability.
Used in power generation systems for high-temperature structural components.
Effective in industrial burners and combustion chambers for corrosion resistance.
Applied in automotive turbocharger parts needing heat and corrosion resistance.
Reliable in vacuum furnace components subjected to extreme heat cycles.
| Specification : | AMS 5608 / AMS 5609 |
|---|---|
| Standard : | AMS, AMS, API |
| Specialize sheets : | Shim, Perforated Sheet, B. Q. Profile. |
| Size : | 0.5 MM TO 200 MM THICK IN 1000 MM TO 2500 MM WIDTH & 2500 MM TO 12500 MM LENGTH |
| Finish : | Cold rolled sheet (CR), 2D, Hot rolled plate (HR), 2B, BA NO(8), SATIN (Met with Plastic Coated) |
| Hardness : | Quarter Hard, Soft, Hard, Half Hard, Spring Hard etc. |
| Grade : | Haynes 188 (UNS R30188) |



| STANDARD | Material No | UNS | Alloy |
|---|---|---|---|
| Haynes 188 | – | R30605 | 188 |
| Grade | C | Mn | P | S | Si | Ni | Cr | Fe | W | B | Mo | Co |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Haynes 188 | 0.05 – 0.15 | 1.25 max | 0.020 max | 0.015 max | 0.20 – 0.50 | 20.0 – 24.0 | 21.0 – 23.0 | 3.0 max | 13.0 – 15.0 | 0.015 max | 0.03 – 0.15 | – |
| Yield Strength | Tensile Strength | Elongation | ||
|---|---|---|---|---|
| ksi | MPa | ksi | MPa | % |
| 65 | 446 | 140 | 963 | 55 |
Size (in mm) | Size (in inches) |
|---|---|
3.40mm | .134″ |
3.18mm | .125″ |
4.75mm | .187″ |
3.96mm | .156″ |
7.92mm | .312″ |
6.35mm | .250″ |
12.7mm | .500″ |
9.53mm | .375″ |
19.1mm | .750″ |
15.9mm | .600″ |
25.4mm | 1″ |
22.2mm | .875″ |
31.8mm | 1.250″ |
28.6mm | 1.125″ |
44.5mm | 1.750″ |
38.1mm | 1.500″ |
63.5mm | 2.500″ |
50.8mm | 2″ |
76.2mm | 3″ |
| Tolerance over and under nominal thickness t (mm) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Width w (mm) | 2.5<t <4.5 | 4.5<t <6.0 | 6.0<t <8.0 | 8.0<t <10.0 | 10.0<t <12.5 | 12.5<t <16.0 | 16.0<t <20.0 | 20.0<t <25.0 | 25.0<t <30.0 | 30<t <40.0 |
| w < 1200 | 0.20 | 0.23 | 0.30 | 0.32 | 0.35 | 0.80 | 0.80 | 0.80 | 1.0 | 1.4 |
| 1200< w <1500 | 0.20 | 0.25 | 0.30 | 0.35 | 0.38 | 0.80 | 0.80 | 0.90 | 1.0 | 1.4 |
| 1500< w <1800 | 0.20 | 0.28 | 0.32 | 0.38 | 0.40 | 0.80 | 0.80 | 0.90 | 1.1 | 1.5 |
| 1800< w <2100 | 0.20 | 0.30 | 0.36 | 0.40 | 0.45 | 0.80 | 0.80 | 0.90 | 1.1 | 1.5 |
| 2100< w <2400 | 0.80 | 0.80 | 0.80 | 0.80 | 0.80 | 0.90 | 1.0 | 1.1 | 1.5 | |
| 2400< w <2700 | 0.80 | 0.80 | 0.80 | 0.80 | 0.90 | 1.0 | 1.1 | 1.3 | 1.7 | |
| 2700< w <3000 | 0.80 | 0.90 | 1.0 | 1.0 | 1.0 | 1.1 | 1.3 | 1.4 | 1.8 | |
| Weight of Hastelloy C22 Plates | Thickness in inches |
|---|---|
| 0.08 lbs/in²56.245568 kg/m² | 1/4 |
| 0.06000 lbs/in²42.184176 kg/m² | 3/16 |
| 0.161 lbs/in²113.1942056 kg/m² | 1/2 |
| 0.121 lbs/in²85.0714216 kg/m² | 3/8 |
| 0.391 lbs/in²274.9002136 kg/m² | 1 1/4 |
| 0.235 lbs/in²165.221356 kg/m² | 3/4 |
| 0.196 lbs/in²137.8016416 kg/m² | 5/8 |
| 0.313 lbs/in²220.0607848 kg/m² | 1 |
| 0.627 lbs/in²440.8246392 kg/m² | 2 |
| 0.941 lbs/in²661.5884936 kg/m² | 3 |
| 0.274 lbs/in²192.6410704 kg/m² | 7/8 |
| 0.862 lbs/in²606.0459952 kg/m² | 2 3/4 |
| 0.549 lbs/in²385.9852104 kg/m² | 1 3/4 |
| 0.47 lbs/in²330.442712 kg/m² | 1 1/2 |
| 0.784 lbs/in²551.2065664 kg/m² | 2 1/2 |
| 0.705 lbs/in²495.664068 kg/m² | 2 1/4 |
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