HAYNES® 556™ alloy - Haynes International, Inc.

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Comparative Oxidation in Flowing Air 1800°F (980°C) for 1008 HoursMicrostructures shown are forcoupons exposed for 1008hours at 1800°F (980°C) in airflowing 7.0 feet/minute (212.0cm/minute) past the samples.Samples were descaled bycathodically charging thecoupons while they wereimmersed in a molten saltsolution. The black area shownat the top of each picturerepresents actual metal lossdue to oxidation. The dataclearly show HAYNES ® 556alloy to be superior to bothRA330 ® alloy and Type 304stainless steel as well as theother iron-base alloys shown inthe table on the previous page.45626HAYNES 556 alloyAverage Metal Affected =1.1 mils (20 µm)49258RA330 alloyAverage Metal Affected =4.3 mils (110 µm)Type 304 Stainless SteelAverage Metal Affected =8.1 mils (205 µm)Comparative Burner Rig Oxidation Resistance 1000 Hour Exposure at 1800°F (980°C)Material230 ® alloy556 alloyRA330 alloyMULTIMET ® alloyalloy 800HType 310 Stainless Steelalloy 600alloy 601*Metal Loss + Maximum Internal PenetrationOxidation Test ParametersBurner rig oxidation tests wereconducted by exposing, in arotating holder, samples 0.375inch x 2.5 inches x thickness(9.5mm x 64mm x thickness) toHAYNES ® 556 TM alloyMetal LossMils µm0.8 0.021.7 0.047.8 0.2011.8 0.3012.3 0.3113.7 0.3512.3 0.313.0 0.08**Extrapolated from 917 hoursthe products of combustion offuel oil (2 parts No. 1 and 1 partNo. 2) burned at a ratio of air tofuel of about 50:1. (Gasvelocity was about 0.3 mach).Samples were automatically10Average Metal Affected*Mils µm3.5 0.096.2 0.1611.8 0.3014.8 0.3815.3 0.3916.5 0.4217.8** 0.45**20.0 0.51removed from the gas streamevery 30 minutes and fan cooledto less than 500°F (260°C)and then reinserted into theflame tunnel.
APPLICATIONSThis high-temperature fan for a heattreatfurnace of HAYNES 556 alloywas selected to resist a number ofatmospheres at 1700 to 1800°F (925to 980°C).HAYNES ® 556 alloy was chosen for componentsof this waste ash handling system operatingat 1650°F (900°C). It has more than doubledthe life of previously used stainless steel.A deposit of HAYNES 556 alloy protectselbows in a piping system at a titaniumdioxide plant. The elbows, coated with 556alloy has lasted over hour times as long asthose hardfaced with a cobalt-base alloy.The inside of the elbow is scoured byabrasive TiO 2and corrosive Cl 2at temperaturesto 1600°F (870°C).HAYNES 556 refractory anchors haveoutperformed other alloys in this tailgasburner which removes high-sulfur gasesfrom effluent of refining operations.11HAYNES ® 556 TM alloy
Page 1 and 2: HIGH-TEMPERATURE ALLOYSHAYNES ® 55
Page 3 and 4: PRINCIPAL FEATURESHigh Strength and
Page 5 and 6: Field Experience - Municipal Waste
Page 7 and 8: Comparative 1700°F (925°C) Mix Ga
Page 9: OXIDATION RESISTANCEHAYNES ® 556 a
Page 13 and 14: OTHER HIGH TEMPERATURE ENVIRONMENTS
Page 15 and 16: Typical Physical Properties (contin
Page 17 and 18: TYPICAL TENSILE PROPERTIESCold-Roll
Page 19 and 20: TYPICAL CREEP AND STRESS-RUPTURE PR
Page 21 and 22: Thermal Stability (continued)Room-T
Page 23 and 24: Fabrication Characteristics (contin
Page 25 and 26: Manual Gas Tungsten Arc WeldingV-or
Page 27 and 28: MACHININGHAYNES ® 556 alloy is sim

HAYNES® 556™ alloy - Haynes International, Inc.

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