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Alloy 617 B

ASME B168, EN 2.4856, INCONEL 625

Forms

Applications

Alloy 617 Applications

Alloy 617 B is specifically designed for use as a pipe and fitting material for steam generators in power plants
with supercritical steam parameters (700 °C power plants).

Alloy 617 B is a nickel-chromium-cobalt-molybdenum alloy with excellent strength and creep properties. It was
developed on the basis of Alloy 617, to meet the high demands of power plant technology for 700 °C power plants.

Alloy 617 Plate Standards
Rod,Bar 17744
17752
B 166/SB 166
B 564/SB 166
573
Sheet,Plate 17744
17752
B 168/ SB 168 -
Alloy 617 Designations
EN 2.4673 - NiCr23Co12Mo
ISO NiCr22Co12Mo9
UNS N06617
Alloy 617 Chemical Composition
Min Balance 21 - 0.05 - - 11 - 0.25 8 - - 0.8 - 0.001
Max Balance 23 1.5 0.08 0.5 0.3 1.3 0.008 0.5 10 0.6 0.012 1.3 0.6 0.005
Alloy 617 Physical Properties
8.4 g/cm3 (0.30 lb/in3) 1,330 - 1,380 ℃(2,426 - 2,516 ℉)
Specific Heat -/- 494/0.118 544/0.13 658/0.157 664/0.159 701/-
Thermal Conductivity 11.7/81.1 14.9/103.3 20.7/143.5 27/187.2 28.5/197.6 32.3/223
Electrical Resistivity 122 126 129 134 138 -
Modulus Of Elasticity 212/30.7 200/29 181/26.3 157/22.8 139/20.2 -/-
Co-efficient of Thermal Expansion 12.09/6.72 13.13/7.29 14.09/7.83 16.02/8.9 17.09/9.49 18.22/10.12
Alloy 617 Mechanical Properties
Yield Strength
MPa/ksi
300/43.5 200/29 185/26.8 180/26.1
Tensile Strength
MPa/ksi
700/101.5 540/78.3 400/58 340/49.3
Elongation
%
35 - - -

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WELDING

Welding Alloy 617

When welding nickel-base alloys and special stainless steels, the following instructions should be adhered to:

A separately-located workplace, which is specifically separated from areas in which carbon steels are being processed,
should be used. Maximum cleanliness is required, and draughts should be avoided during inert gas welding.

Tools used for other materials must not be used for nickel-base alloys and stainless steels. Brushes should be made of
stainless materials. Processing and machining equipment such as shears, punches or rollers must be fitted with means
(felt, cardboard, films) in order to avoid material contamination with ferrous particles, which can be pressed into the
surface of the material and thus lead to corrosion.

Filler metal

The following filler materials are recommended:
  • Rods electrodes.
  • FM 617 B (W.-Nr. 2.4627.
  • AWS A 5.14: ERNiCrMo-1.
  • UNS N0617.