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Alloy 625 Plates


Alloy 625 plates or Inconel 625 is a nickel-base alloy used both for its high electricity and excellent aqueous corrosion resistance. The strength of alloy 625 is mostly a strong solution effect from molybdenum and columbium. Alloy 625 has great weldability and is frequently used to weld AL-6xn alloy. Matching filler metals also are used to enroll in distinctive metals.

Chemistry

  Cr Ni Mo Co Cb+Ta Al Ti C Fe Mn Si P S
MIN 20.0 - 8.0 - 3.15 - - - - - - - -
MAX 23.0 Balance 10.0 1.0 4.15 0.4 0.4 0.1 5.0 0.5 0.5 0.015 0.015

Specifications

• AMS 5666, AMS 5837
• ASME SB 443 Gr 1, ASME SB 446 Gr 1
• ASTM B 443 Gr 1, ASTM B 446 Gr 1
• EN 2.4856
• ISO 15156-3
• NACE MR0175-3
• UNS N06625
• Werkstoff 2.4856

Inventory

625 Coil, 625 Plate, 625 Round Bar, 625 Sheet, 625 Weld Wire

Common Trade Names

Inconel® 625, Alloy 625, Nickel 625

Features

• High creep-rupture strength
• Oxidation resistant to 1800°F
• Good fatigue resistance
• Excellent weldability
• Outstanding resistance to chloride pitting and crevice corrosion
• Immune to chloride ion stress corrosion cracking
• Resistant to seawater under both flowing and stagnant conditions and under fouling

Applications

• Aircraft ducting systems
• Jet engine exhaust systems
• Engine thrust-reverser systems
• Bellows and expansion joints
• Turbine shroud rings
• Flare stacks
• Seawater components
• Chemical process equipment handling mixed acids both oxidizing and reducing.

Physical Properties

Density: 0.305 lb/in 3
Melting Point: 2350-2460°F

Temperature, °F 70 400 600 800 1000 1200 1400 1600
Coefficient* of Thermal Expansion, in/in°F x 10 -6 - 7.3 7.4 7.6 7.8 8.2 8.5 8.8
Thermal Conductivity
Btu • ft/ft2 • hr • °F
5.7 7.2 8.2 9.1 10.1 11.0 12.0 13.2
Modulus of Elasticity, Dynamic psi x 10 6 30 28 28 27 26 24 23 -
* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties, Bar

Temperature,°F 70 400 600 800 1000 1200 1400 1600
Ultimate Tensile Strength, ksi 144 134 132 132 130 119 78 40
0.2% Yield Strength, ksi 84 66 63 61 61 60 59 39
Elongation, % 44 45 42.5 45 48 34 59 117

Typical Rupture Strength Bar, Stress to Rupture at Indicated Time

Temperature, °F 1200 1300 1400
100 Hours, ksi 59 34 18
1,000 Hours, ksi 43 23 12
INCONEL and INCOLOY are registered trademarks of Special Metals (PCC)

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