Hastelloy Availability

Neeka Tubes supplies Hastelloy C276C22, X, B3 and B2. Most of these alloys are available in the form of plate, sheet, bar, pipe, tubing, pipe fittings, flanges and welding material. Request a Quote today on any of these alloys.

The registered trademark name, Hastelloy, is applied as the prefix name to more than twenty different highly corrosion resistant metal alloys produced by Haynes International, Inc. These superalloys, or high performance alloys, developed by Haynes International, are nickel-based steel alloys that exhibit traits that include high resistance to uniform attack, localized corrosion/oxidation resistance, stress corrosion cracking resistance and ease of welding and fabrication.

Alloys of identical chemical and mechanical properties are available from other manufacturers and offer excellent alternatives to the various Hastelloy® brand alloys.

The corrosion-resistant superalloys are widely used by the chemical processing, aerospace, and industrial gas turbine and marine industries. Additionally, due to the their reliable performance, areas of energy, health and environmental, oil and gas, pharmaceutical and flue gas desulfurization industries are increasingly using them.

What are the Characteristics of Hastelloy?

  • High resistance to uniform attack
  • Outstanding localized corrosion resistance
  • Excellent stress corrosion cracking resistance
  • Good resistance to acids such as sulfuric, nitric, hydrochloric, hydrofluoric and chromic
  • Ease of welding and fabrication
  • High resistance to oxidation at elevated temperatures

In what Applications are Hastelloy alloys used?

  • Chemical Processing Industry
  • Aerospace
  • Pharmaceutical
  • Oil and gas production
  • Components where exposure to high mechanical stress and sea water are required
  • Components exposed to flue gas or flue gas desulfurization plants

Superalloys, also known as high performance alloys, have become the steel of choice for corrosion resistance and versatility.

HASTELLOY C-22

 

Hastelloy C22, also known as alloy C22, is a versatile austenitic nickel-chromium-molybdenum-tungsten alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking. The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. Other corrosives Hastelloy C-22 has resistance to are oxidizing acid chlorides, wet chlorine, formic and acetic acids, ferric and cupric chlorides, sea water, brine and many mixed or contaminated chemical solutions, both organic and inorganic. This nickel alloy also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. This is beneficial in multi- purpose plants where such “upset” conditions occur frequently.

This nickel alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition.

Alloy C-22 should not be used in service temperatures above 1250° F due to the formation of detrimental phases which form above this temperature.

 

What are the characteristics of Hastelloy C22?

  • Resistant to pitting, crevice corrosion and stress corrosion cracking
  • Outstanding resistance to both reducing and oxidizing media
  • Excellent resistance to oxidizing aqueous media
  • Exceptional resistance to a wide variety of chemical process environments including strong oxidizers such as ferric acids, acetic anhydride, and seawater and brine solutions
  • Resists the formation of grain-boundary precipitates in the weld heat-affected zone
  • Excellent weldability

Chemical Composition, %

C
Cr
Co
Fe
Mn
Mo
Ni
P
.010 max
20-22.5
2.5 max
2.0-6.0
.50 max
12.5-14.5
Balance
.02 max
Si
S
W
V
 
 
 
 
.08 max
.02 max
2.5-3.5
.35 max
 
 
 
 

 

In what applications is Hastelloy C22 used?

  • Pharmaceutical industries use alloy C-22 fittings and tubing to avoid contamination caused by corrosion related failures
  • Cellophane manufacturing
  • Chlorination systems
  • Pesticide production
  • Incineration scrubber systems
  • Chemical process industry in equipment like flue gas scrubbers, chlorination systems, sulfur dioxide scrubbers, pulp and paper bleach plants, pickling systems, and nuclear fuel reprocessing
  • Waste water processing

Fabrication of Hastelloy C-22

Although ductile enough to be formed by cold working, intermediate annealing may be necessary due to work hardening. Forging should be performed between 1750-2050° F followed by rapid cooling. Annealing can be performed at a temperature range between 2020-2150° F followed by a rapid quench. Cooling at an accelerated rate avoids the formation of detrimental phases which form between 1400-1800° F. Welding can be done by gas tungsten-arc, gas metal-arc and shielded metal-arc processes.

ASTM Specifications

Pipe Smls
Pipe Welded
Tube Smls
Tube Welded
Sheet/Plate
Bar
Forging
Fitting
B622
B619
B622
B626
B575
B574
B564
B366

 

Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Material

Product Form
Tensile (ksi)
.2% Yield (ksi)
Elongation %
Hardness (HRb)
Plate (.25”-1.75”)
112
53
62
89
Sheet (.038”-.15”)
122
63
54
93
Bar (.50”-5.50”)
115
55
60
89

 

HASTELLOY C-276

 

Hastelloy C276 is a nickel-molybdenum-chromium superalloy with an addition of tungsten designed to have excellent corrosion resistance in a wide range of severe environments. The high nickel and molybdenum contents make the nickel steel alloy especially resistant to pitting and crevice corrosion in reducing environments while chromium conveys resistance to oxidizing media. The low carbon content minimizes carbide precipitation during welding to maintain corrosion resistance in as-welded structures. This nickel alloy is resistant to the formation of grain boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process application in an as welded condition.

Although there are several variations of the Hastelloy nickel alloy, Hastelloy C-276 is by far the most widely used.

Alloy C-276 is widely used in the most severe environments such as chemical processing, pollution control, pulp and paper production, industrial and municipal waste treatment, and recovery of sour natural gas.

Corrosion Resistant Hastelloy C276

Considered one of the most versatile corrosion resistant alloys available, Hastelloy C-276 exhibits excellent resistance in a wide variety of chemical process environments including those with ferric and cupric chlorides, hot contaminated organic and inorganic media, chlorine, formic and acetic acids, acetic anhydride, seawater, brine and hypochlorite and chlorine dioxide solutions. In addition, alloy C-276 resists formation of grain boundary precipitates in the weld heat affected zone making it useful for most chemical processes in the as-welded condition. This alloy has excellent resistance to pitting and stress corrosion cracking.

What are the characteristics of Hastelloy C276?

  • Excellent corrosion resistance in reducing environments
  • Exceptional resistance to strong solutions of oxidizing salts, such as ferric and cupric chlorides
  • High nickel and molybdenum contents providing good corrosion resistance in reducing environments
  • Low carbon content which minimizes grain-boundary carbide precipitation during welding to maintain resistance to corrosion in heat-affected zones of welded joints
  • Resistance to localized corrosion such as pitting and stress-corrosion cracking
  • One of few materials to withstand the corrosive effects of wet chlorine gas, hypochlorite and chlorine dioxide

Chemical Composition, %

Ni
Mo
Cr
Fe
W
Co
Mn
C
Remainder
15.0-17.0
14.5-16.5
4.0-7.0
3.0-4.5
2.5 max
1.0 max
.01 max
V
P
S
Si
 
 
 
 
.35 max
.04 max
.03 max
.08 max
 
 
 
 

 

In what applications is Hastelloy C-276 used?

  • Pollution control stack liners, ducts, dampers, scrubbers, stack-gas reheaters, fans and fan housings
  • Flue gas desulfurization systems
  • Chemical processing components like heat exchangers, reaction vessels, evaporators, and transfer piping
  • Sour gas wells
  • Pulp and paper production
  • Waste treatment
  • Pharmaceutical and food processing equipment

Fabrication with Hastelloy C-276

Hastelloy C-276 alloy can be forged, hot-upset and impact extruded. Although the alloy tends to work-harden, you can have it successfully spun, deep-drawn, press formed or punched. All of the common methods of welding can be used, although the oxyacetylene and submerged arc processes are not recommended when the fabricated item is for use in corrosion service.

Hastelloy C-276 Welding Material

Alloy C276 welding products are used as matching composition filler material for welding C276 alloy wrought and cast products, for dissimilar welding applications including other nickel-chromium-molybdenum alloys and stainless steels, and for weld overlay or cladding of steels.

Specifiacations: ASME-SFA-5.14 ERNiCrMo-4

Forms of C276 Filler Metal Available at Neeka Tubes

  • .031 in or .8 mm in diameter
  • .035 in or .9 mm in diameter
  • .039 in or 1.0 mm in diameter
  • .045 in or 1.1 mm in diameter
  • .047 in or 1.2 mm in diameter
  • .062 in or 1.6 mm in diameter
  • .078 in or 2.0 mm in diameter
  • .093 in or 2.4 mm in diameter
  • .125 in or 3.2 mm in diameter

Filler metals are available in spools and in cut lengths from the above diameters. Straight lengths are available in 36" lengths.

ASTM Specifications

Pipe Smls
Pipe Welded
Tube Smls
Tube Welded
Sheet/Plate
Bar
Forging
Fitting
Wire
B622
B619
B622
B626
B575
B574
B564
B366

Mechanical Properties

Typical Room Temperature Tensile Properties of Annealed Material

Product Form
Tensile (ksi)
.2% Yield (ksi)
Elongation %
Bar
110.0
52.6
62
Plate
107.4
50.3
67
Sheet
115.5
54.6
60
Tube & Pipe
105.4
45.4
70