Nickel Alloy 825 pipe (UNS N08825)

Maass Special Alloys supplies Alloy 825 pipes for the most demanding corrosive environments. This titanium-stabilized nickel-iron-chromium alloy delivers exceptional resistance to both oxidizing and reducing acids. Seamless pipe directly from stock or welded options for large-scale projects.

High-quality Alloy 825 pipes

Designed for critical piping in corrosive service

Corrosion resistance

Performs in oxidizing and reducing media

Acid performance

Highly resistant to aggressive acids

SCC resistant

Prevents chloride stress-corrosion cracking

Pitting resistant

Outstanding pitting and crevice resistance

Temperature range

Cryogenic performance up to 1000°F/540°C

Alloy 825 pipes in stock

Responsive Specificatie Tabel
Standard Material Size range Schedules
ASTM/ASME SB 423 UNS N08825 ½″ – 8″ Schedule 10S to Schedule XXS

Need 825 nickel alloy welded pipe for a specific requirement? We supply seamless pipe from stock, with additional options available for project-driven requirements. All piping can be supplied with the complete certified documentation and service options needed to meet your technical and procurement standards.

825 pipe manufacturers: Nippon Steel Corporation (NSC) & Tubacex

Certified supply & additional information

  • EN 10204 / 3.1 certified
  • Dual certified in accordance with ASTM / ASME
  • Material in compliance to International specification
  • Random lengths or cut-to-length
  • Stock delivery times

Upon request

  • Bevelling
  • Additional testing
  • Third-party inspection

Chemical composition

The chemical composition of Alloy 825 / UNS N08825 is designed to provide strong corrosion resistance across a wide range of industrial environments.

The chemical composition limits below are provided for quick reference. Final compliance is confirmed by the Mill Test Certificate (EN 10204 3.1) and the order specification.

Element Limit (%)
Nickel (Ni)38.0 – 46.0
Chromium (Cr)19.5 – 23.5
Iron (Fe)22.0 min.
Molybdenum (Mo)2.5 – 3.5
Copper (Cu)1.5 – 3.0
Titanium (Ti)0.6 – 1.2
Carbon (C)0.05 max.
Manganese (Mn)1.0 max.
Silicon (Si)0.5 max.
Sulfur (S)0.03 max.
Aluminum (Al)0.2 max.

Typical physical and mechanical properties of Alloy 825

The values below provide a general indication of the typical physical and mechanical properties of Alloy 825 across a range of temperatures.
Property Unit 70°F 200°F 400°F 600°F 800°F 1000°F 1200°F
Density lbs/in³ 0.294 - - - - - -
Thermal Expansion x10-6/°F - 7.8 8.3 8.5 8.7 9.5 9.6
Elastic Modulus 10³ ksi 28.3 27.9 27.1 26.0 25.2 23.52 22.37
Poisson’s Ratio - 0.30 0.30 0.30 - - 0.367 0.377
Thermal Conductivity Btu-in/hr-ft²-°F - 85 97.5 109.6 119.7 139 152
Specific Heat Btu/lb-°F 0.105 0.11 0.117 0.123 0.123 0.13 0.14
Yield Strength ksi 35 30 26 25 23 12 11
Tensile Strength ksi 85 77 75 73 71 52 44

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sales@maass-special-alloys.com

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+31 (0)30 8200 370