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Alloy 625 - 2.4856

Wst. 2.4856

UNS N06625 (code 1)

Stock program: 1,5 – 25 mm OD / 1/16” – 1” OD

Specification: ASTM B 444 / DIN17751 / DIN 17741 / EN ISO 1127 / NACE MR0175

Maximum expose temperature: 980°C /1800°F


Alloy 625 is a nickel-chromium-molybdenum alloy with an addition of niobium used for its high strength, excellent fabric ability and outstanding corrosion resistance. The addition of molybdenum acts with the niobium to stiffen the alloy matrix, providing a high strength without a strengthening heat-treatment. This combination of chemical elements is also 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.


Characteristics

  • Excellent strengths and stress-corrosion cracking resistance to chloride ions
  • Seawater pitting and crevice corrosion resistant
  • High creep-rupture strength
  • High temperature resistance up to 980°C/1800°F
  • Non magnetic

Market applications:

  • Control and instrumentation tubes
  • Chemical processing
  • Oil refineries
  • Oil & gas
  • Aircraft and aerospace
  • Seawater equipment

Technical details

Technical composition (%) Fe Cr Ni Mo Mn Si P C S Ti Nb Al
625 min   -   20.0   58.0   8.0   -   -   -   -   -   -   3.15   -
  max   5.0   -   -   10.0   0.50   0.50   0.015   0.100   0.015   0.40   4.15   0.40
Mechanical properties 625
Tensile strenght (mpa, min)   827
Yield strength (0.2% offset mpa, min)   414
Elongation (%, min)   30
Density / weight (g / cm3 / kg)   8.44

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