Also referred to as C22, Hastelloy C22® is an extremely versatile nickel-chromium-molybdenum-tungsten alloy. This nickel alloy is majorly characterized by its high resistance to chloride-induced pitting. Hastelloy C22® also has a commendable resistance capacity against stress corrosion and crevice corrosion cracking. The tungsten and molybdenum content of this material provides it with good resistance to reducing media, while its high chromium level offers great resistance to oxidizing media. This popular nickel steel alloy boasts of having an incredible resistance to diverse types of oxidizing aqueous media, which includes oxidizing acids with chlorine ions, mixtures containing nitric acid, as well as wet chlorine.

The Hastelloy C22® is a nickel alloy that also offers high resistance to environments in which oxidizing and reducing conditions tend to be process streams, and therefore ideal for use in multi-purpose plants where such types of “upset” conditions take place quite frequently.

The high chromium content of the Hastelloy C22® enables it to enjoy much superior resistance to oxidizing media than the typical C-276 alloy and is known to impart incredible resistance to chloride-induced pitting, which is an unpredictable and insidious form of attack. The stainless steel tends to be prone to such types of attacks.

Hastelloy C22® is quite a ductile material, much like all the other nickel alloys. Hastelloy C22® additionally has the capacity to resist grain-boundary precipitate formation in the weld heat-affected zone. This feature of Alloy C-22 makes it ideal for use in the as-welded condition in the majority of chemical process applications. It, however, is important to note that the Alloy C-22 must not be used in environments where service temperatures can go above 1250°F. This is due to the fact that detrimental phases can form above this temperature level.

Hastelloy C22® Application field

The Hastelloy C22® is quite extensively used in the petrifaction and chemical field. It is quite commonly used for the elements of chloride organic and catalyzes the system there. Alloy C-22 is especially well suited for sea-water corrosion environments and high-temperature environments.

Hastelloy C22® Available Formats

At Midland Alloys you can find high-quality Hastelloy C22® in a plethora of forms. These include:

  • Forgings
  • Pipe fittings
  • Flanges
  • Seamless and Welded pipe
  • Seamless Tube and Welded tube
  • Weld Rod
  • Bar
  • Wire
  • Sheet
  • Plate

The Hastelloy C22® sheets are available in diverse thicknesses, which range from .038 to .141. You can also find Hastelloy C22® strip in coil. They tend to be available in lighter gauges up to 12″ wide, while on the other hand Alloy C-22 plate is available up to 2″ thick.

Hastelloy C22® is available in a wrought bar having up to 11″ diameter, and larger shapes and sizes of it can be forged to order.

Hastelloy C22 Chemical Composition

Hastelloy C22NiCMoMnSiFePSCoCr
Balance0.010 max12.5 – 14.50.50 max0.08 max2 – 60.02 max0.02 max2.5 max20 – 22.5

Hastelloy C22 Mechanical Properties

DensityMelting PointYield Strength (0.2%Offset)Tensile StrengthElongation
8.69 g/cm31399 °C (2550 °F)Psi – 45000 , MPa – 310Psi – 1,00,000 , MPa – 69045 %

Hastelloy C22 Melting Point

1399 °C (2550 °F)

In what forms is Hastelloy C22 Available at Steel Tubes India?

  • Sheet
  • Plate
  • Bar
  • Pipe & Tube (welded & seamless)
  • Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
  • Wire

Hastelloy C22 Chemical Composition, %

.010 max20-22.52.5 max2.0-6.0.50 max12.5-14.5Balance.02 max
.08 max.02 max2.5-3.5.35 max    

ASTM Specifications of Hastelloy C22 Products

Pipe SmlsPipe WeldedTube SmlsTube WeldedSheet/PlateBarForgingFitting

C22 alloy steel equivalent

Hastelloy C22N060222.4602NiCr21Mo14WNW 6022

One can also avail Hastelloy C22® seamless pipe up to 2″ NB. Larger sizes of it can be fabricated to order, and also tends to be available in welded construction. No matter the quantity, Alloy C-22 redrawn tubes and tubing having tight tolerances are usually supplied in almost any size.

Renowned forged fittings manufacturers like the Midland Alloys also offer butt-weld and forged fittings that are made up of Hastelloy C22®.

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