HAYNES® 556™ alloy - Haynes International, Inc.

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THERMAL STABILITYHAYNES ® 556 exhibitsreasonable retained ductilityafter long term thermal exposureat intermediate temp-eratures. It does not exhibitsignificant sigma phase formationeven after 16,000 hoursexposure at 1000 to 1600°F(540 to 870°C). Principalphases precipitated from solidsolution are carbides andcarbonitrides.Room-Temperature Tensile Properties of Bar Following Thermal Exposure*ExposureTemperatureUltimateTensileStrengthYield Strengthat 0.2% OffsetElongation in2 in. (50.8 mm)°F °CHoursKsiMPaKsiMPa%1200 6500113.4 78062.5 43046.51000120.5 83059.7 41036.04000121.2 83557.4 39533.08000127.3 88059.8 41029.41400 7600113.4 78062.5 43046.51000128.7 88560.8 42024.84000127.1 87557.4 39525.88000125.1 86554.6 37524.71600 8700113.4 78062.5 43046.51000112.9 78052.3 36032.84000111.5 77042.8 29529.08000108.1 74543.9 30529.5* Average of three tests for each conditionElevated-Temperature Tensile Properties of Bar Following 16,000-Hour Thermal Exposures*TestTemperatureUltimateTensileStrengthYield Strengthat 0.2% OffsetElongation in2 in. (50.8 mm)°F °CKsiMPaKsiMPa%1000 53795.7 66037.4 26048.01200 64888.8 61037.8 26023.41400 76072.3 50035.1 24025.31600 87142.1 29021.9 15029.5HAYNES ® 556 TM alloy 20
Thermal Stability (continued)Room-Temperature Tensile Properties of Sheet Following1000-Hour Thermal Exposures*TestTemperature°F °CUltimateTensileStrengthKsi MPaYield Strengthat 0.2% OffsetKsi MPaElongation in2 in. (50.8 mm)%RoomRoom118.1 81559.5 41047.71200 6481400 760118.4 815118.8 82053.4 37053.8 37037.917.01600 871111.0 76546.6 32020.4* Average of two or more testsFABRICATION CHARACTERISTICSHeat TreatmentHAYNES ® 556 alloy isnormally final solution heattreatedat 2150°F (1175°C) fora time commensurate withsection thickness. Solutionheat-treating can be performedat temperatures as low as about2125°F (1165°C), but resultingmaterial properties will bealtered accordingly. Annealingduring fabrication can beperformed at even lowertemperatures, but a final,subsequent solution heattreatment is needed to produceoptimum properties and structure.Please refer to followingsections and publication H-3159for additional information.Typical Hardness PropertiesHardness, R A7472706866646260Sheet Hardness atRoom Temperature454035302520Hardness, R CSolution AnnealedRoom Temperature HardnessFormR BSheet 91.0Plate 96.558560 10 20 30 40 50% Cold Reduction21HAYNES ® 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 and 12: APPLICATIONSThis high-temperature f
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: TYPICAL CREEP AND STRESS-RUPTURE PR
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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