What is the difference between Inconel 600 and incoloy 825?
Incoloy 825 (Nickel 825) Strip, Coil, Foil, Wire, AMS 5542, ASTM B424
Applications
Chemical Processing Components
Pollution Control
Oil and Gas Recovery
Pickling Tank Components
Nuclear Fuel Processing
Description of Incoloy 825
The two most important nickel alloys used in the oil and gas industry are Inconel 625 and Incoloy 825. Incoloy 825 is an austenitic nickel-iron-chromium-molybdenum-copper alloy containing high levels of chromium, nickel, copper, and molybdenum to provide a high level of corrosion resistance in both moderately oxidizing and moderately reducing environments. This balance of alloying elements gives this alloy excellent resistance to chloride stress corrosion cracking as well as crevice and general corrosion. The high nickel content, along with high molybdenum and copper contents in this nickel alloy provide significantly improved corrosion resistance in corrosive environments, such as reducing environments, compared to stainless steel. The addition of titanium to this alloy also helps stabilize the alloy against intergranular corrosion. Chloride stress corrosion cracking is a localized intergranular corrosion that occurs when a material is subjected to tensile strength, high temperatures, and an environment containing oxygen and chloride ions, such as seawater.
Chemical Composition Typical Values
Nickel: 38.00 - 46.00
Chromium: 19.50 - 23.50
Iron: 22.00 min
Titanium: 0.06 - 1.2
Molybdenum: 2.50 - 3.50
Copper: 1.50-3.00
Carbon: 0.05 max
Manganese: 1.0 max
Sulfur: 0.03 max
Silicon: 0.5 max
Aluminum: 0.2 max
Physical Properties
Density: 0.294 lbs/in3, 8.14 g/cm3
Specific Heat, (32 - 212 ° F), Btu/lb•° F, (0 - 100 ° C), J/kg•° C: 0.105 (440)
Average Coefficient of Thermal Expansion: in/inl° F (mm/ml° C):
70 - 212 ° F (20 - 100 ° C): 7.7 x 10-5 (13.9)
Thermal Conductivity: BTU/h-ft-° F (W/m-° K) 70 ° F (21 ° C): 6.4 (11.1)
Modulus of Elasticity: ksi (MPa)
28.4 x 103 (196 x 103) tensile
Permeability at 70 ° F (21 ° C) H = 200 Oersted:
Annealed: 1.005
Melting Point: 2500 - 2550 ° F (1370 - 1400 ° C)
Forms
Coil
Strip
Foil
Tape
Wire
Profile
Round
Flat
Square
Mechanical Properties of Incoloy 825 at Room Temperature
Annealed Typical Values
Ultimate Tensile Strength: 85 KSI Min (586 MPa Min)Yield Strength: (0.2% Shift) 35 KSI Min (241 MPa Min)Elongation: 30% mi
Tempering:
Incoloy® 825 can be cold rolled to various tempers. Contact Ulbrich Technical Service for more information.
Other Properties
Corrosion Resistance of Incoloy 825
See recommendations from NACE (National Association of Corrosion Engineers).
Surface Finishes
#1 - Hot rolled annealed and descaled. Available in strip, foil and ribbon. For applications where a smooth decorative surface is not required.
#2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and parts where lubricant retention during forming is required. #2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass with polished rolls after annealing gives a brighter finish than 2D.
#BA- Bright Annealed Cold Rolled and Bright Annealed
#CBA- Coarse Bright Annealed Cold Rolled Matte Finish and Bright Annealed
#2 - Cold Rolled
#2BA- A smooth finish produced by cold rolling and bright annealing. A light pass with highly polished rolls produces a glossy finish. The 2BA finish can be used for light forming applications where a glossy finish is desired for the formed part. Polished - Various grit finishes for specific polished surface requirements. * Not all finishes are available on all alloys - contact Ulbrich Sales for more information.
Wire Finishes
XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled Grease - Extra Bright Finish (for decorative applications) Soap - Soap coating on tempered wire used as a lubricant. * Contact Ulbrich Wire for custom wire finishes.
Heat Treatment
Lncoloy 825 cannot be heat treated for hardening.
