INCONEL® Alloy 693

  • N06693
  • N/A

Key properties

(in annealed condition)
Tensile strength: 77.00
Yield strength: 128.00
Elongation: 45.00%

Composition

Cr

27.00-31.00%

Al

2.50-4.00%

Fe

2.50-6.00%

Mn

1.00% max

Cu

0.50% max

Nb

0.50-2.50%

Si

0.50% max

C

0.15% max

S

0.01% max

Ni

Balance

Continued evelopment of the high chromium content nickel based alloys created INCONEL® alloy 693, which offers resistance to high temperature corrosion mechanisms not previously available from a nickel-based alloy. In particular, it can significantly reduce or eliminate the risk of metal dusting. As a result, designers of gas generation equipment are selecting this material in synfuel processes, petrochemical processes and other high temperature environments.

INCONEL® alloy 693 offers the best resistance to metal dusting in chemical and petrochemical processing environments of any conventional alloy currently manufactured. Alloy 693 typically contains 60.5% nickel, 29% chromium, and 3.1% aluminum.  Like its predecessor, INCONEL alloy 690, the alloy’s high chromium content gives it excellent resistance to oxidation and sulphidation. However, the addition of 3.1% aluminum to alloy 693 vastly improves resistance to other forms of high temperature corrosion as well.