• BS 3076 NA16
  • 2.4858
  • NiCr 21 Mo
  • NFe 32 C 20 DU
  • ASTM B425
  • UNS N08825
  • API 6CRA 825
View Data Tables For This Product

Alloy 825 HS110 (UNS N08825 110ksi)

Alloy 825 HS110 is a high strength nickel-iron-chromium alloy with additions of molybdenum, copper and titanium (NiCr21Mo), supplied in the hot worked, annealed and cold worked condition. Alloy 825 is often referred to as Incoloy 825 (where Incoloy is a trademark of Special Metals Corp). Controlled cold working ensures that the product achieves significantly increased yield strengths over the annealed product, whilst retaining good ductility and toughness.

It achieves good mechanical properties from cryogenic to medium-high temperatures (5400C) and can be significantly strengthened through cold working. The high nickel content ensures resistance to stress corrosion cracking, combined with molybdenum and copper to strongly resist reducing environments such as sulphuric and phosphoric acids. The addition of chromium helps to resist oxidising environments such as nitric acid whilst titanium inhibits intergranular corrosion, and overall resistance to pitting and crevice corrosion.

alloy 825 HS110


  • BS 3076 NA16
  • 2.4858
  • NiCr 21 Mo
  • NFe 32 C 20 DU
  • ASTM B425
  • UNS N08825
  • API 6CRA 825
View Data Tables For This Product

Data Tables

Chemical Composition:


Mechanical Properties:

0.2% Proof Stress758 N/mm2 (110ksi)965 N/mm2 (140ksi)
Tensile Strength793 N/mm2 (115ksi)
Elongation, 5.65√S0 and 4D11%
Reduction of Area
Hardness (Rockwell C)35


  1. Testing shall be carried out in accordance with ASTM A370 or EN ISO 6892-1 (tensile), EN ISO 6506-1 (hardness)
  2. Minimum properties quoted (tested at room temperature in a longitudinal direction)
  3. Testing performed on each melt of material per heat treatment batch

Physical Properties:

Density (Kg.m-1)81.4
Magnetic Permeability (20°C)1.005
Curie Temperature (°C)-196
Young’s Modulus (N/mm2)196
Specific Heat, 20°C (J/(g.K))440
Specific Electrical Resistance, 20°C (Ω-m)0.00113
Thermal conductivity, 20°C (W/(m.K))10.8
Mean coefficient of thermal expansion, 20-100°C (/K)14.1 x 10-6

Product Features

Key Features:

  • Excellent corrosion resistance in a wide variety of corrosive environments including seawater and industrial acids
  • Readily formable and weldable
  • Excellent resistance to stress corrosion cracking


  • Chemical process equipment
  • Pollution control systems and wet scrubbers
  • Waste heat recovery exchangers
  • Tanks, vessels and agitators
  • Downhole equipment for corrosive/sour service
  • Nuclear reprocessing and handling
Datasheet NA Alloy 825 HS110
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