Alloy 825 (UNS N08825)
TECHNICAL DATA SHEET
Alloy 825
(UNS N08825) NICKEL
ALLOY
Chemical Composition Chemical Composition (wt%) limits as specified in ASTM B425*
Description
Alloy 825 is an austenitic nickel-iron-chromium-molybdenum-copper alloy containing high levels of chromium, nickel, molybdenum and copper to provide high levels of corrosion resistance to both moderately oxidizing and moderately reducing environments. The alloy has a high level of nickel, which in combination with the level of molybdenum and copper, produces substantially improved corrosion resistance in reducing environments compared to the standard stainless steels. The nickel content is sufficiently high to provide superb resistance to chloride stress corrosion cracking. The chromium and molybdenum content of the alloy provides a level of resistance to chloride ion pitting. In addition, the alloy is stabilized against sensitization in the welded condition by the addition of a specified level of titanium. Because of this stabilization, the material is resistant to intergranular attack after exposure in the temperature range, which would sensitize unstabilized stainless steels. Alloy 825 has a long history of use in many corrosive environments and has been incorporated in ASTM and ASME specifications for many years. As an austenitic, nickel-base alloy, the material is ductile over a wide range of temperatures from cryogenic to well in excess of 1000°F (538°C).
Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. © 2015 Double Eagle Alloys Inc. All rights reserved.
Element Carbon Chromium Nickel Iron Molybdenum Titanium Manganese Silicon Copper Aluminum Sulfur
Alloy 825 0.05 19.5-23.5 38.0-46.0 22.0 min 2.5-3.5 0.6-1.2 1.0 0.5 1.5-3.0 0.1-0.5 0.03
* Maximum, unless range is indicated
Mechanical Properties Mechanical property requirements as specified for annealed product in ASTM B 425 Property Yield Strength, min. (ksi) Tensile Strength, min. (ksi) Elongation, min. (%)
Physical Properties Physical properties for Alloy 825 Property Density, lb/in3 Modulus of Elasticity, psi Coefficient of Thermal Expansion, 68-212˚F, /˚F Thermal Conductivity, Btu/ft hr ˚F Specific Heat, Btu/lb ˚F Electrical Resistivity, Microhm-in
Standards Typical standards for Alloy 825
Double Eagle Alloys 1660 N 168th E Avenue Tulsa, OK 74116 Phone: (918) 254-1100 Fax: (918) 254-1101
w w w. d o u b l e e a g l e a l l o y s . c o m
Alloy 825 35 85 30
Alloy 825 ASTM B425 ASME SB 425
Alloy 825 Data 0.293 28.3 x 106 7.7 x 10-6 6.4 0.12 44.5
Alloy 825
(UNS N08825) NICKEL
ALLOY
Chemical Composition Chemical Composition (wt%) limits as specified in ASTM B425*
Description
Alloy 825 is an austenitic nickel-iron-chromium-molybdenum-copper alloy containing high levels of chromium, nickel, molybdenum and copper to provide high levels of corrosion resistance to both moderately oxidizing and moderately reducing environments. The alloy has a high level of nickel, which in combination with the level of molybdenum and copper, produces substantially improved corrosion resistance in reducing environments compared to the standard stainless steels. The nickel content is sufficiently high to provide superb resistance to chloride stress corrosion cracking. The chromium and molybdenum content of the alloy provides a level of resistance to chloride ion pitting. In addition, the alloy is stabilized against sensitization in the welded condition by the addition of a specified level of titanium. Because of this stabilization, the material is resistant to intergranular attack after exposure in the temperature range, which would sensitize unstabilized stainless steels. Alloy 825 has a long history of use in many corrosive environments and has been incorporated in ASTM and ASME specifications for many years. As an austenitic, nickel-base alloy, the material is ductile over a wide range of temperatures from cryogenic to well in excess of 1000°F (538°C).
Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice. We make no representation or warranty as to its accuracy and assume no duty to update. Actual data on any particular product or material may vary from those shown herein. © 2015 Double Eagle Alloys Inc. All rights reserved.
Element Carbon Chromium Nickel Iron Molybdenum Titanium Manganese Silicon Copper Aluminum Sulfur
Alloy 825 0.05 19.5-23.5 38.0-46.0 22.0 min 2.5-3.5 0.6-1.2 1.0 0.5 1.5-3.0 0.1-0.5 0.03
* Maximum, unless range is indicated
Mechanical Properties Mechanical property requirements as specified for annealed product in ASTM B 425 Property Yield Strength, min. (ksi) Tensile Strength, min. (ksi) Elongation, min. (%)
Physical Properties Physical properties for Alloy 825 Property Density, lb/in3 Modulus of Elasticity, psi Coefficient of Thermal Expansion, 68-212˚F, /˚F Thermal Conductivity, Btu/ft hr ˚F Specific Heat, Btu/lb ˚F Electrical Resistivity, Microhm-in
Standards Typical standards for Alloy 825
Double Eagle Alloys 1660 N 168th E Avenue Tulsa, OK 74116 Phone: (918) 254-1100 Fax: (918) 254-1101
w w w. d o u b l e e a g l e a l l o y s . c o m
Alloy 825 35 85 30
Alloy 825 ASTM B425 ASME SB 425
Alloy 825 Data 0.293 28.3 x 106 7.7 x 10-6 6.4 0.12 44.5
