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Haynes 188 / Alloy 188 / 2.4983 Haynes 188 heat resistant alloy is a nickel chromium alloy, with a cobalt base. It is distinguished by high resistance to oxidation, at operating temperatures up to 1100 degrees. Special properties Alloying ensures the versatility of the alloy: – Chromium increases hardness and resistance to corrosion. – Nickel […]
Haynes 188 / Alloy 188 / 2.4983
Haynes 188 heat resistant alloy is a nickel chromium alloy, with a cobalt base. It is distinguished by high resistance to oxidation, at operating temperatures up to 1100 degrees.
Special properties
Alloying ensures the versatility of the alloy:
– Chromium increases hardness and resistance to corrosion.
– Nickel makes the material plastic.
– Tungsten provides strength and red resistance.
– Vanadium and manganese provide impact and abrasion resistance.
– Cobalt provides thermal stability and magnetic permeability.
In addition, Haynes 188 heat-resistant steels contain titanium and copper to resist corrosion, niobium to promote acid resistance, and aluminum to prevent dross.
The alloy also exhibits significant resistance to sulfiding.
High quality steels may also contain zirconium and boron.
Applications
Today, heat-resistant steel can be bought in the form of a circle, rnoy or seamless pipe, wire, plate, sheet, forging, fitting and flange. Rolled metal is successfully used in the production of elements of gas turbines, gas pipeline systems, flame traps in combustion chambers.
Chemical composition of Alloy 188
|
Ni |
Cr |
C |
Mn |
Si |
S |
P |
W |
Fe |
Al |
La |
Co |
|
20.0-24.0 |
20.0-24.0 |
0.5-0.15 |
<1.25 |
0.2-0.4 |
<0.015 |
<0.015 |
13.0-16.0 |
<3,0 |
<0 ,20 |
0.02-0.12 |
Other |
Alloy 188 mechanical properties
| Tensile Strength | 125 ksi | 860 MPa |
| Yield strength (0.2% deviation) | 55 ksi | 380 MPa |
| Relative elongation, min. |
40 % |
|
Haynes 188 Delivery Forms
| Haynes Circle 188 |
Diameter 4 -300mm |
| Sheet Haynes 188 |
Thickness 0.5-20mm |
| Haynes Tape 188 |
Thickness 0.2-2mm |
| Stripe Haynes 188 |
Thickness 10-50mm |
| Haynes 188 wire |
Diameter 0.5-9mm |
| Pipe Haynes 188 |
– Hot rolled round tube diameter 38 to 244.5 mm, thickness 3 to 25 mm -Cold drawn round pipe diameter from 6 to 219.1mm thickness from 0 .9 to 14.2mm |
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