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Inconel 825 Sheet & Plate

Inconel 825 Sheet & Plate (UNS N08825)

Inconel 825, also known as UNS N08825, is a nickel-iron-chromium alloy with molybdenum, copper, and titanium added. It is designed to offer excellent resistance to various corrosive environments, making it a preferred material for demanding applications in industries like chemical processing, marine engineering, and oil and gas.

 

Key Feature

Exceptional Corrosion Resistance: Inconel 825 demonstrates outstanding resistance to reducing and oxidizing acids, such as sulfuric and phosphoric acids. It is also resistant to stress-corrosion cracking, pitting, and crevice corrosion.
High-Temperature Stability: It performs effectively at elevated temperatures, retaining its mechanical properties in challenging conditions.
Versatile Mechanical Properties: The alloy combines high strength with good weldability and formability, making it suitable for various manufacturing processes.

 

Technical Specifications:

  • UNS Number: N08825
  • Standards Compliance: ASTM A240/A240M

Available Thickness

3/16″1/4″3/8″1/2″5/8″3/4″
4.8mm6.3mm9.5mm12.7mm15.9mm19mm
1″1 1/4″1 1/2″1 3/4″2″
25.4mm31.8mm38.1mm44.5mm50.8mm
inconel-825-sheet-plate

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M

Equivalent Grade for Inconel 825

CountryStandardGrade
USAASTMB425 (Nickel 825)
EuropeENNiCr21Mo
GermanyDIN2.4858
FranceAFNORNCF 825
UKBS625
JapanJISNCF 825
ChinaGBGH825
IndiaIS625
RussiaGOST825
South KoreaKSX-825

Corrosion Resistance

  • Acid Resistance: Effective against sulfuric acid, phosphoric acid, and nitric acid, making it suitable for use in chemical processing environments.
  • Oxidation Resistance: Provides good protection against oxidation at high temperatures.
  • Sulfidation Resistance: Offers resistance to sulfidation, which is beneficial in environments where sulfur compounds are present.
  • Stress-Corrosion Cracking: Resists stress-corrosion cracking, particularly in environments where chlorides and other aggressive substances are present.
  • General Corrosion: Performs well in various media, including seawater and high-temperature industrial environments.

Inconel 825 Chemical Composition

ElementComposition (%)
Nickel (Ni)38.0 – 46.0
Iron (Fe)22.0 – 26.0
Chromium (Cr)19.0 – 23.0
Copper (Cu)1.5 – 3.0
Molybdenum (Mo)2.5 – 3.5
Titanium (Ti)0.6 – 1.2
Aluminum (Al)0.2 max
Carbon (C)0.05 max
Manganese (Mn)1.0 max
Sulfur (S)0.03 max

Inconel 825 Physical Properties

PropertyValue
Density8.15 g/cm³
Melting Point1,350°C (2,462°F)
Thermal Conductivity~10.7 W/m·K
Specific Heat Capacity~0.43 J/g·K

Inconel 825 Mechanical Properties

PropertyValue (at room temperature)
Yield Strength~310 MPa (45 ksi)
Ultimate Tensile Strength~620 MPa (90 ksi)
Elongation~30%
Hardness (Rockwell B)~85 B

Fabrication Data

  • Forming: Alloy 825 can be cold worked using conventional techniques. Hot working should be performed at temperatures between 950-1200°C (1740-2190°F).
  • Welding: Suitable for various welding methods, including MIG, TIG, and SMAW. It’s important to use proper filler materials and preheat if necessary.
  • Machining: Nickel 825 is generally machinable using standard procedures for nickel alloys, though it can be tough and may require specialised tools and techniques.
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