Inconel 625

Alloy 625 is a Nickel-Chromium alloy used for its high strength, excellent fabricability and outstanding corrosion resistance. Service temperatures range from cryogenic to 1800 ̊ F. Alloy 625 strength is derived from the stiffening effect of molybdenium and columbium on its Nickel-Chromium matrix; thus precipitation-hardening treatments are not required. This combination of elements also is responsible for superior resistance to a wide range of corrosive environments of unusual severity as well as to high-temperature effects such as oxidation and carburization.

Chemical Composition

C Cr Fe Ni Al Ti Co + TA
Max Max Min Max Max
0.10 20.0 – 23.0 5.0 58.0 0.40 0.40 3.15 – 4.15

Design Features

  • Outstanding resistance to pitting, crevice corrosion, impingement corrosion and intergranular attack.
  • Almost complete freedom from Chloride- induced stress corrosion cracking.
  • Good resistance to mineral acids, such as nitric, phosphoric, sulphuric and hydrochloric acids.
  • Good resistance to alkalis and organic acids.
  • Good mechanical properties.

Typical Applications

  • Used for structures in contact with seawater and subject to high mechanical stresses
  • Flue gas scrubbers components
  • Chimney linings
  • Superphosphoric acid production equipment
  • Sour gas production tubes
  • Offshore industry, marine equipment High tensile, creep, rupture strength, outstanding fatigue and thermal-fatigue strength; oxidation resistance; and excellent weldability and brazeability make it a good choice in the aerospace industry

Material_625

Availability

  • Alloy 625 Welded Pipe 1/2” – 24”
  • Alloy 625 Butt-Weld Fittings 1/2” – 8”
  • Alloy 625 Flanges 1/2” – 24”
  • Alloy 625 Bar 1/8” – 11”
  • Alloy 625 Seamless Pipe 1/4” – 8”
  • Alloy 625 Plate 1/8” – 3”
  • Alloy 625 Seamless Tube 1/8” – 1”
  • Alloy 625 Pressure Fittings 1/4” – 2”

Specifications

  • ASTM B443, B705, B366, B446, B564
  • ASME SB443, SB705, SB366, SB446, SB564

Tensile Requirements

Tensile Strength (KSI) 120
Yield Strength (KSI) 60
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.

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