Inconel 690 is a high-chromium, nickel-based alloy with excellent resistance to corrosion by a variety of aqueous media and high-temperature atmospheres. It also has high strength, good metallurgical stability and excellent processing characteristics.
Alloy | % | C | Cr | Fe | Ti | Al | Nb+Ta | Cu | B | Mn | Si | S | P | Co | N | Zr | Ni |
690 | Min. | 0.015 | 27.0 | 7.0 | - | - | - | - | - | - | - | - | - | - | - | - | balance |
Max. | 0.03 | 31.0 | 11.0 | 0.5 | 0.5 | 0.1 | 0.2 | 0.005 | 0.5 | 0.5 | 0.01 | 0.015 | 0.05 | 0.05 | 0.02 |
Density
|
8.19 g/cm³
|
Melting point
|
1343-1377 ℃
|
Status
|
Tensile strength
(MPa) |
Yield strength
(MPa) |
Elongation
As % |
Solution treatment
|
372
|
738
|
44
|
Bar/Rod | Wire | Strip/Coil | Sheet/Plate | Pipe/Tube | Forging |
ASTM B / ASME SB 166,ASTM B 564 /ASME SB 564,ASME Code Case N-525,ISO 9723, MIL-DTL-24801 | ASTM B / ASME SB 166,ASTM B 564 /ASME SB 564,ASME Code Case N-525,ISO 9723, MIL-DTL-24801 | ASTM B / ASME SB 168 /906,ASME N-525, ISO 6208,MIL-DTL-24802 | ASTM B / ASME SB 168 /906,ASME N-525, ISO 6208,MIL-DTL-24802 | ASTM B / ASME SB 163,ASTM B 167 / ASME SB 829,ASTM B 829 /ASME SB 829,ASME Code Cases 2083, N-20, N-525,ISO 6207, MILDTL-24803 | ASTM B / ASME SB 166,ASTM B 564 /ASME SB 564,ASME Code Case N-525,ISO 9723, MIL-DTL-24801 |
1. Excellent resistance to many corrosive aqueous media and hightemperature atmospheres.
2.High strength. good metallurqical stability, and favorable fabrication characteristics
3.outstanding resistance to oxidizina chemicals and to high-temperature oxidizina gases
4 Good resistance to stresscorrosion cracking in chloride-containing environments as wel as to sodium hvdroxide solutions
The alloy's resistance to sulfur-containing gases makes it an attractive material for such applications as coal-gasification units, burners and ducts for processing sulfuric acid, furnaces for petrochemical processing, recuperators, incinerators, and glass vitrification equipment for radioactive waste disposal. In various types of high-temperature water, alloy 690 displays low corrosion rates and excellent resistance to stress-corrosion cracking. Thus. alloy 690 is widely used for steam generator tubes, baffles, tubesheets, and hardware in nuclear power generation.