Haynes Alloy

Haynes alloy 556 exhibits useful resistance to a wide variety of high-temperature corrosive atmospheres as well as molten salts. The presence of approximately 18% cobalt results in more resistance to sulfidation than 

Alloy 556 exhibits excellent resistance to hydrochloric, phosphoric, and organic acids, alkalies, salts, seawater, and chlorine stress corrosion cracking. It also offers good resistance to sulfuric acid, hydrofluoric acid, and nitric add. 

T)rpical applications include internals of munidpal waste incinerators and refractory anchors in refinery tail gas huming units. 

The chemical composition of alloy 214 will he foimd in Table 15.21. This is a nickel-hased alloy with excellent resistance to 2200 (1204°C). The excellent oxidation resistance is the result of the tenadous aluminum oxide film that protects the metal during prolonged exposiue. 

The alloy possesses the highest oxidation resistance to hoth static and dynamic environments among the nickel-hased alloys. The alumina film also lends superior resistance to carhiuizing environments and complex environments containing chlorine and oxygen. However, as typical of many high-temperature alloys, alloy 214 does not possess good resistance to aqueous chloride solutions therefore dew point conditions must he avoided. 

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Haynes alloy 6B, composition of wear-resistant alloy, 7 22 It Haynes alloy 25, 7 225 properties, 7 225t... 

Haynes alloy 25 (L605), composition of wear-resistant alloy, 7 22 It Haynes alloy 188, composition of wear-resistant alloy, 7 22 It Hayward Tyler agitator, 1 739 HAZARD I method, 11 449 Hazard acceptance, 13 170 Hazard Analysis and Critical Control Point (HACCP) protocol, 15 260 Hazard analysis and risk assessment,... 

Recommended bellows material INCONEL 625 Grade 2 (LCF) - annealed after forming or HAYNES ALLOY 230. ASTM B435 UNS N06230 is preferred above 650 °C but is rather expensive. 

The Research Centre of Karlsruhe conducted tests with a view to finding materials capable of withstanding the oxidizing, corrosive conditions involved in the use of supercritical water. The materials examined included various alloys such as austenite, AISl type 316 SS austenitic CrNi stainless steel and several Ni-based alloys (viz. Inconel 625, Hastelloy C-276, Nicrofer 5923, Nicrofer 6025 and Haynes alloy 214) that were used to fabricate pressure tubes for exposure to supercritical water containing 0.5-5 mol O /kg and/or 0.05-0.5 mol HCI/kg over a period of 150 h (a preliminary step on this line) [190]. 

Models 2400 (aortic) and 6400 (mitral) Starr-Edwards composite track valve prostheses are closed single-cage hollow metallic ball valve prostheses. The cage struts, poppets, and metallic closure supports on the inner aspect of the base ring are made of Haynes alloy No. 21 (Stellite alloy No. 21) and are easily seen radiographically. The inner aspect of the cage struts has no cloth covering and hence no metal-cloth contact. 

Jansen, D. H. and Hoffman, E. E., Type 316 Stainless Steel, Inconel, and Haynes Alloy No. 25 Natural Circulation Boiling-Potassium Corrosion Test Loops, Oak Ridge National Laboratory Report, ORNL-3790, 1965. 

HAYNES alloy No. 25 is a cobalt-base alloy which combines good formability, wear and corrosion resistance with excellent high-temperature properties to 1900°F (1038°C). 

CORROSION RESISTANCE OF HAYNES ALLOY NO. 25 All results are expressed in mils (mm) penetration per year. Acid strengths are given in percent by weight. In some instances, no measurable penetration could be observed. These instances are noted by the word, "Nil." All data are steady-state as calculated from a minimum of five 24 hr test periods. 

Media Concentration HASTELLOY and Temperature alloy C DELORO alloy No. 40 DELORO alloy No. 50 DELORO alloy No. 60 STELLITE HAYNES alloy alloy No. 6 No. 716 ... 

Unit No. 9 Unit No. 9 grips the rod with Stellite 3 shoes instead of with stainless steel fingers as do Units No. 7 and 8. The magnetic parts are USS Stainless W and the rollers and roller races are Stellite 3. Unit No. 9 operated with a Type 347 stainless steel rod for 23 hr (83,000 steps) before the rod galled enough to malfunction. It was then operated with a Haynes Alloy 25 rod for 32-1/2 hr (116,000 steps). The rod and mechanism show no galling or measurable wear. 

C-22 (Haynes Alloy) Composite/ 304H (Mitsubishi Materials) 22.5 14.5 6.0 3.5 (Japan) ... 

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