Hastelloy is a nickel-based corrosion-resistant alloy, mainly divided into two categories: nickel-chromium alloys and nickel-chromium-molybdenum alloys. Hastelloy has good corrosion resistance and thermal stability, and is mostly used in the aviation business, chemical field, etc.
Hastelloy plates are suitable for use in a variety of chemical industries that contain oxidizing and reducing media. The higher molybdenum and chromium content enables the alloy to resist chloride ion corrosion, and the tungsten element further improves corrosion resistance. Meanwhile C-276 Hastelloy tube is one of only a few materials resistant to corrosion by moist chlorine, hypochlorite and chlorine dioxide solutions, and has significant corrosion resistance to highly concentrated chloride salt solutions such as ferric chloride and copper chloride.Application areas: heat exchangers, bellows compensators, chemical equipment, flue gas desulfurization and denitrification, paper industry, aerospace applications, acidic environments .
The advantages of using Hastelloy casting instead of traditional metals include increased strength, higher corrosion resistance, improved temperature tolerance, and better wear resistance.
Hastelloy is Resistant to Corrosion
One of the most important properties of Hastelloy is its resistance to corrosion. This alloy is resistant to both acidic and basic solutions, as well as salt water. Additionally, Hastelloy does not corrode in the presence of chlorine or other halides.
Hastelloy is Strong and Durable
Another advantage of Hastelloy is that it is a strong and durable metal. This alloy can withstand high temperatures without losing its strength or becoming brittle. Additionally, Hastelloy does not expand or contract when exposed to extreme temperatures, making it ideal for use in high-pressure applications.
Hastelloy is Non-magnetic
Hastelloy is also non-magnetic, which makes it ideal for use in applications where magnetic materials are not desired. This property also makes Hastelloy resistant to electromagnetic interference.
Hastelloy is Easy to Work With
Hastelloy is relatively easy to work with compared to other alloys. It can be welded, machined, and formed using standard methods and equipment. Additionally, Hastelloy can be cold worked without becoming brittle
Hastelloy alloy is a generic name for the commercial grades of nickel-based corrosion-resistant alloys produced by Hastelloy International, Inc. These include nickel-molybdenum Hastelloy B-2, nickel-chromium-molybdenum Hastelloy C-4, etc.
Hastelloy grades include the following grades.
HASTELLOY B-2 Nickel-molybdenum alloy with excellent corrosion resistance in reducing environments HASTELLOY B-3 An upgraded version of B-2 with excellent corrosion resistance to hydrochloric acid at any temperature and concentration.
HASTELLOY C-4 Better thermal stability, good toughness and corrosion resistance at 650-1040 degrees C
HASTELLOY C-22 Better resistance to uniform corrosion in oxidizing media than C-4 and C-276, excellent resistance to localized corrosion HASTELLOY C-276 Better resistance to oxidizing and moderate reducing corrosion, excellent resistance to stress corrosion HASTELLOY C-2000 The most versatile corrosion resistant alloy, in both oxidizing and reducing environments Excellent resistance to uniform corrosion.
HASTELLOY G-35 An upgrade of G-30 with better corrosion resistance and thermal stability HASTELLOY G-30 A nickel-based alloy with high chromium content that performs well in phosphoric acid and other strong oxidizing acid mixtures
HASTELLOY X combines high strength, oxidation resistance and easy processing characteristics of each grade above have specific chemical composition, mechanical properties, each has its own strengths, can not be generalized to say what characteristics of Hastelloy.
The Corrosion-Resistant HASTELLOY alloys are widely used by the chemical processing industries. The need for reliable performance leads to their acceptance and growth in the areas of energy, health and environmental, oil and gas, pharmaceutical and flue gas depressurization industries.
The attributes of HASTELLOY alloys include:
High resistance to uniform attack
Outstanding localized corrosion resistance
Excellent stress corrosion cracking resistance
Ease of welding and fabrication.
Hastelloy is widely used in acidic environments.
Monel is widely used for marine applications.
Hastelloy is relatively cheaper due to the low amount of nickel (Usually less than 60% nickel)
Monel is relatively costlier as it has more nickel (60 to 70% nickel)
Hastelloy has a higher melting point (around 2550 Deg F)
Monel has a melting point of 2460 Deg F.
The tensile strength of Hastelloy is lower (in the range of 690 to 783 Mpa)
Monel has a higher tensile strength (550 to 1100 Mpa)
|Weight Content (wt%)||51 – 63.5||0 – 2.5||14.5 – 16.5||15 – 17||4 – 7||3 – 4||0 – 1||0 – 0.35||0 – 0.08||0 – 0.01||0 – 0.5||0 – 0.04||0 – 0.03|
|Atomic Content (at%)||54.6 – 67.4||0 – 2.7||17.4 – 20||10 – 11||4 – 8||1 – 1 ?||0 – 1.14||0 – 0.43||0 – 0.18||0 – 0.05||0 – 0.49||0 – 0.08||0 – 0.06|
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