J&J Alloys

J & J Alloys is and industry leading manufacturer of nickel alloy fitting and flanges with a wide array of standard as well as specialty products we are capable of producing.

Alloy 625

Description

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 molybdenum and columbium on its Nickel-Chromium matrix; thus precipitationhardening 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.

Design Features

  • Outstanding resistance to pitting, crevice corrosion, impingement corrosion and intergranular attack.
  • Almost complete freedom from Chlorideinduced 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 braze-ability make it good choice in the aerospace industry
AVAILABILITY SPECS
FLANGES 1/2" - 8" B444, B564, B16.5
FORGINGS B564
TENSILE REQUIREMENTS
TENSILE STRENGTH (KSI) 120 - 150
YIELD STRENGTH (KSI) 60 - 95
ELONGATION 30% MIN.
C CR FE NI AL TI MO CB + TA MN SI P S CO
MAX MAX MIN MAX MAX MAX MAX MAX MAX MAX
0.10 20.0 - 23.0 5.0 58.0 0.40 0.40 8.0 - 10.0 3.15 - 4.15 0.50 0.50 0.015 0.015 1.0
GRADE 1 - CHEMICAL COMPOSITION %