HAYNES® 556™ alloy - Haynes International, Inc.

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RESISTANCE TO CHLORINE-BEARING ENVIRONMENTSHAYNES ® 556 alloy can beconsidered resistant to hightemperatureoxidizing environmentscontaining chlorine.Although not as resistant asHAYNES 214 alloy at temperaturesabove 1650°F(900°C), 556 alloy has resistancecomparable to that of 214alloy at temperatures at orbelow 1650°F (900°C). This isshown by the test results givenfor 400 hour exposures at1650°F (900°C) in a flowing gasmixture of Ar+20%O 2+0.25%Cl 2. Note that 556 alloy showsvery low metal loss compared tomost of the alloys tested, whichincluded alloys 600, 625,INCONEL alloy 601 andHASTELLOY C-276 alloy.47535Alloy 60047263HAYNES 556 alloy1412AverageInternalPenetrationMetal Loss Ar-20%O 2-0.25%Cl 2for 400 hours1650°F (900°C)C-276350300Average Metal Affected (mils)10864214 5566006016252502001501002500HAYNES ® 556 TM alloy 12
OTHER HIGH TEMPERATURE ENVIRONMENTSMolten Chloride SaltsMaterialHAYNES 188 alloyHASTELLOY X alloyHAYNES 556 alloyType 304 stainless steelType 310 stainless steelAlloy 600INCONEL alloy 601HAYNES ® 556 alloy exhibitsreasonable resistance to neutralNaCl-KCl-BaCl 2-type heattreatingsalts at temperaturesup to 1550°F (845°C) basedupon actual field tests in amolten salt pot heat treatingfacility. Coupons were exposedfor 30 days.Average Metal AffectedMils mm28 0.738 1.042 1.174 1.979 2.094 2.4115 2.9Phosphorus-Bearing Combustion EnvironmentMaterialHASTELLOY X alloyHAYNES 556 alloyHAYNES 214 alloyHASTELLOY S alloyHAYNES 188 alloyAlloy 800HType 304 stainless steelBased upon field tests performedin the combustionchamber of a fluid bed dryerused to dry sodium tripolyphosphatecompounds, HAYNES556 alloy exhibits very goodresistance to corrosion causedby formation of low-meltingpoint eutectics involving phosphorus.Samples were exposed30 days at a temperatureof about 1475°F (800°C).Maximum Metal AffectedMils µm3.0 756.0 1508.0 2059.0 2309.0 23011.0 28015.0 380Molten ZincResistance to molten zinc is animportant consideration forstructural components ingalvanizing operations. Laboratorytests were performed at850°F (455°C) for 50 hours inmolten zinc to determinesuitability for such operations.Results are given below:MaterialHAYNES 556 alloyHAYNES 25 alloyHAYNES 188 alloy1010 Carbon Steel446 Stainless SteelMetal Loss* mils (µm)1.6 412.3 582.5 649.2 2349.3 236MaterialAlloy 800H304 Stainless SteelHAYNES 625 alloyHASTELLOY X alloy**dissolvedMetal Loss* mils (µm)11.0 28014.1 358>24.0** >610**>24.0** >610***no internal attack noted for any of the alloys tested13HAYNES ® 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 and 10: OXIDATION RESISTANCEHAYNES ® 556 a
Page 11: APPLICATIONSThis high-temperature f
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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