Cobalt and cobalt alloys · Alloy 188 / UNS R30188 / 2.4983
High-Temperature Alloy 188 (UNS R30188) — Technical Data and Applications
Technical Characteristics and Properties of Alloy 188
Alloy 188 (UNS R30188) is an advanced high-temperature cobalt-based alloy designed for extreme operating conditions. It demonstrates exceptional oxidation resistance at high temperatures and possesses outstanding structural stability. EV Group China engineers recommend this material for critical components of gas turbine installations, aircraft engines, and combustion chambers where an optimal combination of high tensile strength and creep resistance is required.
| Product Form | Parameter | Value |
|---|---|---|
| Sheet, plate, forgings, welding wire | Specifications | SB-435 |
| Sheet, plate, forgings, welding wire | Specifications | SB-435 |
| Sheet, plate, forgings, welding wire | Analogs | 2.4683 |
| Sheet, plate, forgings, welding wire | Analogs | 2.4683 |
| Sheet, plate, forgings, welding wire | Analogs | CoCr20WNi |
| Sheet, plate, forgings, welding wire | Analogs | CoCr20WNi |
| Sheet, plate, forgings, welding wire | Name | Alloy 188, Conicro 4023 W, VDM Alloy 188, UNS R30188 |
| Sheet, plate, forgings, welding wire | Name | Alloy 188, Conicro 4023 W, VDM Alloy 188, UNS R30188 |
| Sheet, plate, forgings, welding wire | Name | Alloy 188, Conicro 4023 W, VDM Alloy 188, UNS R30188 |
| Sheet, plate, forgings, welding wire | Specifications | B435 |
| Sheet, plate, forgings, welding wire | Specifications | B435 |
| Sheet, plate, forgings, welding wire | Analogs | DIN |
| Sheet, plate, forgings, welding wire | Analogs | W.Nr. |
| Sheet, plate, forgings, welding wire | Specifications | ASME |
| Sheet, plate, forgings, welding wire | Specifications | ASTM |
Chemical Composition of Alloy 188 (wt. %)
The unique performance properties of Alloy 188 are achieved through precise alloying with tungsten and lanthanum. This provides excellent thermal stability and significantly enhances corrosion resistance in aggressive environments, which is critically important for the longevity of highly stressed components.
| Ni | Parameter | Value |
|---|---|---|
| 20,0-24,0 | Al | <0,20 |
| 20,0-24,0 | C | 0,05-0,15 |
| 20,0-24,0 | Co | Balance |
| 20,0-24,0 | Cr | 20,0-24,0 |
| 20,0-24,0 | Fe | <3,0 |
| 20,0-24,0 | La | 0,02-0,12 |
| 20,0-24,0 | Mn | <1,25 |
| 20,0-24,0 | P | <0,015 |
| 20,0-24,0 | S | <0,015 |
| 20,0-24,0 | Si | 0,2-0,4 |
| 20,0-24,0 | W | 13,0-16,0 |
Mechanical Properties of Alloy 188
Alloy 188 consistently demonstrates high strength characteristics at operating temperatures up to 1100°C. Below are the standard values for mechanical properties at room temperature, confirming its suitability for the most demanding applications:
| Tensile Strength | Parameter | Value |
|---|---|---|
| Yield Strength (0.2% offset) | 125 ksi | 55 ksi |
| Yield Strength (0.2% offset) | 860 MPa | 380 MPa |
| Elongation | 125 ksi | 40 % |
| Elongation | 860 MPa | 40 % |
Physical Parameters
The density of Alloy 188 is 9.10 g/cm³. EV Group China ensures the supply of this material, providing a full package of quality certificates, which guarantees compliance with all standards for use in high-tech industries.