HAYNES® 556™ alloy - Haynes International, Inc.

More documents

Recommendations

Info

$P:\P25065\H-# Literature\H-2082 - Haynes International, Inc.$

CARBURIZATION RESISTANCEHAYNES ® 556 alloy hasexcellent resistance to carburization,as measured in bothmixed gas exposure tests andpacked graphite exposure tests.Results for these tests arepresented in the followingpages.All results are presented interms of the mass of carbonabsorption per unit area, whichwas obtained from the equationM = C(W/A) where M = themass of carbon absorption perunit area (mg/cm 2 ). C = differencein carbon (weightfraction) before and afterexposure , W = weight of theunexposed specimen (mg) andA = surface area of the specimenexposed to the test environment(cm 2 ).Packed Carburization ResistanceCarbon absorption observed for556 alloy following 500 hourexposure in packed graphite at1800°F (980°C) was negligible,as shown below. Similarresistance was exhibited byHAYNES HR-120 ® alloy. Thisis in contrast to other alloystested, all of which exhibitedmeasurable carbon absorption.In particular, the resistanceto carburization of 556alloy was significantly betterthan that for the stainless steeltype materials.1210500 Hours @ 1800°F (980°C)in packed graphiteCarbon Absorption (mg/cm 2 )86420HR-120 ®alloy556 TMalloy230 ®alloyalloy601RA330 ®alloy310Stainless253 MA ®alloyMixed Gas Carburization TestsCarbon absorption observed for556 alloy following exposure atboth 1700°F (925°C) and1800°F (980°C) to a carburizinggas mixture was significantlylower than that for most othermaterials tested. This is shownin the graphs on the followingpages. For these tests, theexposure was performed in agas environment consisting of(by volume %) 5.0% H 2, 5.0%CO, 5.0% CH 4and the balanceargon. The calculated equilibriumcomposition (volume %) at1800°F (980°C) and one atmwas 14.2% H 2, 4.8%CO,0.003% CO 2, 0.026% CH 4,0.011% H 2O and the balanceargon. The activity of carbonwas 1.0 and the partial pressureof oxygen was 9 x 10 -22 atm at1800°F (980°C).HAYNES ® 556 TM alloy 6
Comparative 1700°F (925°C) Mix Gas Carburization TestsHAYNES ® 556 TM alloy1700°F (925°C) for 217 HoursAlloy 800HAlloy 600HASTELLOY X alloyINCONEL alloy 601INCONEL alloy 617Type 310 stainless steel12 3 4 5 6 7Carbon Absorption Per Unit Area (mg/cm 2 )Typical Carburized Microstructures (Unetched) After ExposureFor 215 Hours At 1700°F (925°C)4486144708HAYNES 556 alloyType 310 Stainless Steel7HAYNES ® 556 TM alloy
Page 1 and 2: HIGH-TEMPERATURE ALLOYSHAYNES ® 55
Page 3 and 4: PRINCIPAL FEATURESHigh Strength and
Page 5: Field Experience - Municipal Waste
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 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.

Create successful ePaper yourself

Delete template?

Save as template?