Hastelloy
Hastelloy is the brand name of a nickel-based alloy from Haynes International , Inc. The group of materials it describes is resistant to many aggressive chemicals.
Varieties
Hastelloy B
| Type | Material number | EN short name |
|---|---|---|
| Hastelloy B | 2.4617 | NiMo28 |
| Hastelloy B-2 | 2.4617 | NiMo28 |
| Hastelloy B-3 | 2.4600 | NiMo29Cr |
The Hastelloy-B alloys belong to the group of highly corrosion-resistant nickel-molybdenum alloys. Hastelloy B contains 26 to 30% molybdenum .
These materials are characterized by their very good resistance in reducing media, e.g. B. in hydrochloric acid in the entire concentration and temperature range.
| property | Temperature in ° C | ||||||
|---|---|---|---|---|---|---|---|
| 0 | 100 | 200 | 300 | 400 | 500 | 600 | |
| Density in kg / m 3 | 9217 | - | - | - | - | - | - |
| Electrical resistance in µΩ · m | 1.37 | 1.38 | 1.38 | 1.39 | 1.39 | 1.41 | 1.46 |
| Thermal conductivity in W / (m K) | 11.1 | 12.2 | 13.4 | 14.6 | 16.0 | 17.3 | 18.7 |
| Specific heat capacity in kJ / (kg K) | 0.373 | 0.389 | 0.406 | 0.423 | 0.431 | 0.444 | 0.456 |
Hastelloy C
Hastelloy C was originally developed as a material for drive nozzles in jet engines. The very good temperature resistance also led to its use in other areas of technology. These nickel-chromium-molybdenum alloys are characterized by their excellent resistance in oxidizing and reducing media, even at elevated temperatures. The alloy CX2M [Hastelloy C-22] offers good resistance to wet media, e.g. B. sulfuric acid , phosphoric acid , nitric acid , chlorine gas , acid mixtures of sulfuric acid and oxidizing acids with chloride ions. A special feature of this alloy is its high resistance to crevice, pitting and stress corrosion cracking at elevated temperatures under oxidizing and reducing conditions.
Hastelloy C-276
Hastelloy C-276 is a nickel-molybdenum-chromium alloy with very good corrosion resistance.
Hastelloy G.
Hastelloy G is an alloy (G-30) that is particularly resistant to corrosion by phosphoric acid and is therefore well suited for use in fertilizer production plants.
Hastelloy X
Hastelloy X is an alloy made from molybdenum, chromium, iron and other elements. It is primarily used in the manufacture of melting furnaces because it is extremely heat-resistant. It is easy to weld.
use
Hastelloy is frequently used, for example, in reactors, pipelines and valves in the chemical and pharmaceutical industries or in pressure vessels in nuclear power plants . In addition to other nickel-based alloys, there are alternatives in chemical plant construction as well as steel or GRP components that have a chemically resistant lining, e.g. B. from perfluoroalkoxylalkane (PFA) are provided.
Web links
- Hastelloy B-3 alloy . Haynes International, accessed January 5, 2010 (information brochure; English; PDF file; 109 kB).
Individual evidence
- ↑ Otto-Albrecht Neumüller (Ed.): Römpps Chemie-Lexikon. Volume 3: H-L. 8th revised and expanded edition. Franckh'sche Verlagshandlung, Stuttgart 1983, ISBN 3-440-04513-7 , p. 1640.
- ↑ a b c Kuhn stainless steel. (No longer available online.) Formerly in the original ; Retrieved January 5, 2010 . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ^ Daniel S. Christen: Practical knowledge of chemical process engineering: Handbook for chemists and process engineers . Springer DE, 2005, ISBN 3-540-40322-1 , pp. 102 ( limited preview in Google Book search).
- ↑ a b Hastelloy B and B-2 TECHNICAL DATA ( Memento of December 18, 2010 in the Internet Archive ) www.hightempmetals.com, accessed on January 5, 2010.
- ↑ Hastelloy C-276 on haynesintl.com ( Memento of the original from February 18, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. in English.
- ↑ Hastelloy G-30 on haynesintl.com ( Memento of the original from February 11, 2015 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. in English.
- ↑ Hastelloy G-30 on ulbrich.com in English.
- ↑ Hastelloy X on hightempmetals.com in English.
