NeoNickel

Alloy 22

A nickel-chromium-molybdenum grade, Alloy 22 exhibits excellent resistance to both oxidising and reducing environments.

With the addition of tungsten, alloy 22 provides exceptional resistance to pitting and crevice corrosion, in oxidising acid halide environments.

  • UNS Number: N06022
  • Werkstoff Number: 2.4602
  • ASTM: B564, B574, B575, B619, B622, B626, B366, B462, B775

Product availability

Coil
Coiled Weld Wire
Flanges
Pipe (Seamless)
Pipe (Welded)
Pipe Fittings
Plate
Round Bar
Round Tube
Sheet
Welding Wire

Chemical analysis

%NiCrMoFeWCoCMnSiVPS
MinBalance2012.522.5-------
Max-22.514.563.52.50.0150.50.080.350.020.02

Key Properties

  • Density: 8.61g/cm³
  • Melting Range: 1351-1387°C
  • Hardness: 89 HRB
  • Specific Heat Capacity: 381 J/kg.°C
  • Electrical Resistivity: 1.215µΩ.m
  • Curie Temperature: < -196°C
  • Poisson's Ratio: 0.3

About Alloy 22

Due to its high nickel content, Alloy 22 is immune to chloride-induced stress corrosion cracking.

The alloy demonstrates outstanding resistance to pitting and crevice corrosion particularly in high chloride containing environments.

Alloy 22 has exceptional resistance to a large range of chemical process environments, including ferric chlorides, chlorine, hot contaminated solutions, acetic acids, seawater and brine solutions. Alloy 22 is the ideal choice when considering alloys for use in extreme corrosive environments.

If you require any additional information on this alloy, then please don’t hesitate to contact us.

Mechanical & Physical Properties

Mechanical & Physical Properties-196⁰C20⁰C100⁰C200⁰C300⁰C400⁰C
Ultimate Tensile Strength for sheet ≤ 50 mm thick690-950
Ultimate Tensile Strength for bar ≤ 90 mm thick690-951
0.2% Yield Strength for sheet ≤ 50 mm thick310270225195175
0.2% Yield Strength for bar ≤ 90 mm thick310290245215195
Elongation, % for sheet ≤ 50 mm thick45
Elongation, % for bar ≤ 90 mm thick45
Charpy Impact V-notch men value / J96120
Thermal Conductivity 10.111.113.415.517.5
Modulus of Elasticity / 105MPA2.051.971.85

Aqueos Corrosion Data

MediaCommon NameTemp. °F (°C)Corrosion Rate (mpy)
99% C2H4O2Acetic AcidBoilingNIL
10% FeCl3Ferric ChlorideBoiling1
88% CH2O2Formic AcidBoiling<1
1% HClHydrochloric AcidBoiling3
5% HClHydrochloric Acid158 (70)19
10% HClHydrochloric AcidBoiling400
5% HCl + 42 g/l Fe2(SO4)3Mixed Acid150 (66)2
5% HCl + 2% HFMixed Acid158 (70)59
5% HFHydrofluoric Acid158 (70)14
85% H3PO4Phosphoric AcidBoiling13
44% P2O5Phosphoric Oxide240 (116)21
38% P2O5 + 2000ppm ClMixed Acid185 (85)1
38% P2O5 + 0.5% HFMixed Acid185 (85)7
10% HNO3Nitric AcidBoiling<1
65% HNO3Nitric AcidBoiling134
5% HNO3 + 6% HFMixed Acid140 (60)67
5% HNO3 + 25% H2SO4 + 4% NaClMixed AcidBoiling12
5% HNO3 + 1% HClMixed AcidBoiling<1
5% HNO3 + 2.5% HClMixed AcidBoiling2
8.8% HNO3 +15.8% HClMixed Acid126 (52)4
2% H2SO4Sulphuric AcidBoiling5
10% H2SO4Sulphuric AcidBoiling12
20% H2SO4Sulphuric AcidBoiling33
50% H2SO4Sulphuric Acid174 (79)16
80% H2SO4Sulphuric Acid199 (93)68
10% H2SO4 + 1% HClMixed Acid194 (90)94
25% H2SO4 + 200 ppm Cl-Mixed Acid158 (70)11
23% H2SO4 + 1.2% HCl + 1% FeCl3 + 1% CuCl2ASTM G28BBoiling8
50% H2SO4 + 42g/l Fe2(SO4)3ASTM G28ABoiling40

Applications

  • Reactors and pressure vessels
  • Nutsche pressure filters
  • Centrifugers and dryers
  • Agitators and mixers
  • Containment vessels and glove boxes
  • Pollution control equipments
  • Flue gas desulphurisation (FGD) lined ducts and dampers
Proud members of the British Valve & Actuator AssociationProud members of the British Valve & Actuator Association