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Alloy – 59

Alloy 59 consumables provide a strong, tough Nb-free weld metal for dissimilar welds in superaustenitic and superduplex stainless steels, as well as their combinations with nickel base alloys. Certain authorities have prohibited or discontinued the use of 625 type consumables in such applications due to the possibility of harmful Nb-rich precipitates forming in diluted or partially mixed regions near the fusion boundary. Alloy C276 may be a more cost-effective alternative depending on the properties required in this situation.

In addition to having exceptional mechanical strength and corrosion resistance, the nickel-chromium-molybdenum alloy Alloy 59 also has excellent ductility. Other than that, the alloy is very resistant to stress corrosion cracking, chloride pitting, and oxidising and reducing media, as well as other types of corrosion.

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Chemical Analysis :

Element Content (%)
Nickel, Ni 56 - 63
Chromium, Cr 22 - 24
Molybdenum, Mo 15 - 16.5
Iron, Fe ≤1.5
Manganese, Mn ≤0.5
Cobalt, Co ≤0.3
Aluminum, Al 0.1-0.4
Silicon, Si ≤0.1
Phosphorous, P ≤0.015
Carbon, C ≤0.3
Sulfur, S ≤0.005

Mechanical Properties :

Properties Metric) Imperial
Tensile strength (@sheet and strip 0.5 to 6.4 mm) 690 MPa 100000 psi
Yield strength (@rod, bar, forgings > 100 mm) 320 MPa 46400 psi
Modulus of elasticity 210 GPa 30500 ksi
Elongation at break 40% 40%


The following are some of the major applications of alloy 59:

  • Flue gas scrubber components,
  • Pulp and paper industry,
  • Sulfuric acid coolers,
  • Seawater equipment
  • Waste incinerators
Work Process

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