ALLOY 690 / INCONEL 690

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  • N06690
  • 2.4642

ALLOY 690 / INCONEL 690

Alloy 690 / Inconel 690 is a high chromium content version of INCONEL® alloy 600 with excellent resistance to many oxidising acids and salts and some resistance to sulphidation at elevated temperatures. The resistance in Nitric acid plus hydrofluoric acid mixtures lends itself to pickle shop duties. 

Key properties

(in annealed condition)
Tensile strength: 66.80
Yield strength: 110.00
Elongation: 39.00%

Ni

58.00% min

Cr

27.00-31.00%

Fe

7.00-11.00%

Cu

0.50% max

Mn

0.50% max

Si

0.50% max

C

0.05% max

S

0.01% max

INVENTORY

Product form Size range from Size range to
Alloy 690 pipe 0.5 in 8 in
Alloy 690 tube 12 mm 260 mm
Alloy 690 pipe fittings 0.5 in 8 in
Alloy 690 flanges 0.5 in 8 in
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APPLICATIONS

heat-exchangers

Alloy 690 can be used in a variety of applications

  • Heat exchangers
  • Steam Generators
  • High temperature applications exposed to caustic solutions

ABOUT ALLOY 690 / INCONEL 690

The superior stress cracking resistance of alloy 690 has caused it to supercede INCONEL® alloy 600 in steam generation nuclear reactors for piping, separators and weldments.

More recently the alloy has superceded INCONEL® alloy 601 as the material of choice for metal dusting environments, which in conjunction with INCONEL® alloy 693 have created an excellent engineering material for the latest designs of compact reformers and Fischer -Tropsch syngas generation units.

To learn more about our stock of Alloy 690 pipe and tube contact us, or fill in our online quote request form and one of our team will get back to you.

Properties of Alloy 690

DENSITY    8.19 Mg/m³ | 0.296 lb/in³
MELTING POINT 1343-1377°C | 2450-2510°F
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ALLOY 690 MECHANICAL PHYSICAL PROPERTIES

Property ROOM TEMPERATURE  
Specific Heat (0-100°C) 450 J.kg-1.°K-1
Thermal Conductivity 13.5 W.m -1.°K-1
Thermal Expansion 14 μm/μm/°C
Modulus Elasticity 211 GPa
Electrical Resistivity 1.26 μohm/cm
Density 8.2 g/cm3

Alloy 690 Specifications

UNS Number N06690
WNR Number 2.4642
Standards ASTM B167

Welding Consumables

WELDING ELECTRODES INCONEL Welding Electrode 152
FILLERS INCONEL Filler Metal 52
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