Alloy 625 Sheet, Bar, Plate, Coil - AMS 5599, 5666, N06625

Inconel® 625 is a nickel-based superalloy with excellent resistance to oxidation and corrosion, in conditions ranging from jet engine propulsion systems to chemical processing of oxidizing and reducing acids. The nickel-chromium matrix of Inconel® 625 is reinforced by the addition of molybdenum and niobium, which is alloyed through solid solution strengthening, and this allows it to maintain high strength and toughness at temperatures ranging from cryogenic up to 2000°F (1093°C). It is non-magnetic, austenitic, and displays high tensile strength, fabricability, and brazeability. Due to its high nickel content, this alloy is nearly immune to chloride ion stress-corrosion cracking and pitting, which is commonly found in metals in seawater applications like heat exchangers, fasteners, and cable sheathing.


625 Inventory Size Ranges

Sheet & Coil

0.016" - 0.130"

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Plate

0.1875" - 2.000"

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Bar

0.375" - 7.000"

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Standard Inventory Specifications

625 Sheet, Coil and Plate:

  • UNS N06625
  • UNS N06626-625LCF
  • AMS 5599
  • ASTM B 443 Gr 1
  • ASME SB 443 Gr 1

625 Bar:

  • UNS N06625
  • UNS N06626-625LCF
  • AMS 5666
  • ASTM B 446

Other industry standards we comply with:

  • EMS95377
  • EN 2.4856
  • EN 10204
  • DFARS Compliant
  • RR SABRe Edition 2
  • S1000 / S-SPEC-1
  • GE Aviation S-SPEC-35 AeDMS S-400
  • PWA LCS

Common Trade Names

  • Alloy 625
  • Nickel 625
  • Inconel 625 (® Special Metals)
  • Haynes 625 (® Haynes International)

Common Applications of 625

  • Aerospace components
  • Propeller blades
  • Submarine propulsion motors
  • Utility boat exhaust ducts
  • Steam-line bellows
Chemical Composition of Inconel 625
Element Percent by Weight
C Carbon 0.010 maximum
Mn Manganese 0.50 maximum
P Phosphorus 0.015 maximum
S Sulfur 0.015 maximum
Si Silicon 0.50 maximum
Cr Chromium 20.00 - 23.00
Ni Nickel Balance
Mo Molybdenum 8.00 - 10.00
Nb Columbium 3.15 - 4.15
Ti Titanium 0.40 maximum
Al Aluminum 0.40 maximum
Ta Tantalum 0.05 maximum
Fe Iron 5.00 maximum

Physical Properties

  • Density: 0.303 lb/in3 (8.44 g/cm3
  • Specific Gravity: 8.44
  • Melting Range: 2350 - 2460°F (1280 - 1350°C)
  • Specific Heat: 0.098 Btu/lb x °F (410 Joules/kg x °K)
  • Magnetic Permeability (75°F, 200 oersted): 1.0006

Thermal Conductivity

Temperature Range Linear Coefficients of Thermal Expansion1 · 10-6 Thermal Conductivity2 3
°C °F /°C /°F W/m·K Btu/(hr/ft²/in/°F)
-157 -250 - - 7.3 4.2
-129 -200 - - 7.4 4.3
-73 -100 - - 8.3 4.8
-18 0 - - 9.2 5.3
21 70 - - 9.9 5.7
38 100 - - 10.0 5.8
93 200 12.8 7.1 10.7 6.3
204 400 13.1 7.3 12.6 7.3
316 600 13.3 7.4 14.2 8.2
427 800 13.7 7.6 15.7 9.1
538 1000 14.0 7.8 17.5 10.1
649 1200 14.8 8.2 19.0 11.0
760 1400 15.3 8.5 20.8 12.0
871 1600 15.8 8.8 22.8 13.2
927 1700 16.2 9.0 - -
982 1800 - - 25.3 14.6
  1. Average coefficient from 70°F (21°C) to temperature shown
  2. Measurements made at Battelle Memorial Institute
  3. Material annealed 2100°F (1149°C)

Electrical Resistivity

Temperature microhm-cm
°C °F
21 70 128.9
38 100 129.6
93 200 131.9
204 400 133.9
316 600 134.9
427 800 135.9
538 1000 137.9
649 1200 137.9
760 1400 136.9
871 1600 135.9
982 1800 134.9
1093 2000 133.9

Mechanical Properties and Yield Strength

Mechanical Properties and Yield Strength of Alloy 625

Temperature 0.2% Yield Strength Ultimate Tensile Strength Elongation Percent
°F °C psi MPa psi MPa
1920 1065 63,000 430 136,000 940 51.5

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.


Please contact us for more details. The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.