Haynes 188 Bar/Wire/COIL
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
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Haynes 188 is a cobalt based alloy with excellent high temperature strength and great oxidation resistance up to 2000° F. Haynes 188's has good resistance to sulfidation and good metallurgical stability, therefore Haynes 188 can be easily fabricated.
We produce and supply Haynes 188(Alloy 188) N30188/W.Nr 2.4683 in the shape of bar, wire, strip, sheet, Tube, Ect.
The excellent oxidation resistance of Haynes 188 results from minute additions of lanthanum, which modifies the protective oxide scale in such a manner that the oxide becomes extremely tenacious and retards diffusion when exposed to temperatures through 2100°F (1150°C).
Haynes 188 exhibits good ductility after prolonged exposure at temperatures of 1200, 1400, and 1600°F (650, 760 and 870°C) for 16,000 hours.Alloy 188 is also particularly resistant to sulphate-deposit hot corrosion.
Common Trade Names:
Alloy 188 / Haynes 188 / UNS N30188 /W.Nr：2.4683
Specifications：
AMS 5608, AMS 5801, AMS 5772
Haynes 188 Characteristic
Strength and oxidation resistant to 2000°F
Good post-aging ductility
Resistant to sulfate deposit hot corrosion
Haynes 188 Chemical Composition
| % | Cr | Ni | Co | W | La | B | C | Fe | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 20 | 20 | - | 13 | 0.02 | - | 0.05 | - | - | 0.2 | - | - |
| Max | 24 | 24 | Balance | 16 | 0.12 | 0.015 | 0.015 | 3 | 1.25 | 0.5 | 0.02 | 0.015 |
Haynes 188 Physical Properties
| Density | Melting range |
|---|---|
| 8.97 g/cm³ | 1302-1410°C |
Haynes 188 Mechanical Properties
| Mechanical & Physical Properties | 21°C | 427°C | 538°C | 649°C | 760°C | 871°C | 982°C | 1093°C |
|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength /MPa | 944.6 | - | - | 710.2 | 620.5 | 413.7 | 241.3 | 131 |
| 0.2% Yield Strength /MPa | 462 | - | - | 275.8 | 268.9 | 248.2 | 131 | 62.1 |
| Elongation % | 53 | - | - | 59 | 63 | 64 | 59 | - |
| Coefficient of Thermal Expansion µm/m⁰C | - | 14 | 14.8 | 15.5 | 16.2 | 16.9 | 17.8 | - |
| Thermal Conductivity /kcal/(hr.m.°C) | - | 15.5 | 17.1 | 18.9 | 20.7 | 21.6 | 23.5 | - |
| Modulus of Elasticity/ x105 MPa | 2.34 | 2 | 1.93 | 1.79 | 1.72 | 1.65 | 1.52 | - |
Haynes 188 Typical Stress Fracture Strength
| Temperature, °F | 1400 | 1500 | 1600 | 1700 | 1800 |
|---|---|---|---|---|---|
| 100 hours, ksi | 32 | 22 | 14 | 9 | 5 |
| 1000 hours, ksi | 23 | 15 | 9 | 6 | 2 |
Haynes 188 Available Shape
Haynes 188 Size Range
Bars & Rods & Foring Ring /Flanges
Sheet & Plate
Strip & Coil
Welding Wire &Spring wire
Seamless Tube & Welded Pipe
Workability:
Haynes 188 can be forged and, because of its good ductility, can be readily cold formed. It can be welded by both manual and automatic welding methods including electron beam, gas tungsten arc (TIG) and resistance welding. Alloy 188 exhibits good restraint welding characteristics.
Heat-Treatment
Wrought forms of Haynes 188 are furnished in the solution heat-treated condition unless otherwise specified. Alloy 188 is normally solution heat-treated at 2150°F +/-25°F (1177°C +/-14°C) and rapid air cooled or water quenched. Bright annealed products are cooled in hydrogen.
Cold-Work and Aging
Because of its relatively high strain hardening coefficient, Haynes 188 can be easily strengthened by cold deformation. Strengthening is further enhanced by aging the cold-worked structure near 1000°F (540°C) for a period of 4 to 16 hours. This combination of treatments increases both the room and elevated tensile strength of alloy 188 sheet. Cold working prior to aging significantly increases the rate of the aging reaction.
Microstructure
Haynes 188 has a stabilized face-centered-cubic matrix containing nominally 22% Cr, 0.05% La and 0.4% Si to promote oxidation resistance. W at 14% is added for solid solution strengthening. Strengthening is further enhanced by the precipitation of M6C and M23C6 carbides. Intermediate temperature ductility is achieved by deterring the formation of a A2B Laves-type phase through selective alloying.
FAQ
Q: How do you control quality ?
A: Mill Test Certification is supplied with shipment, Third Party Inspection is available. and we also get ISO,SGS,Alibaba Verified.
Q: What are the advantages of your company ?
A: We have many professionals, technical personnel, more competitive prices and best after-dales service than other stainless steel companies.
Q: How many coutries you already exported ?
A: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.
Q: Can you provide sample ?
A: Yes. We can provide the small samples in stock for free, as long as you contact us.Customized samples will take about 5-7 days.
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