HAYNES ® 188 alloy - Haynes International, Inc.

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LOW CYCLE FATIGUE PROPERTIESHAYNES® 188 alloy exhibits for strain-controlled tests run machined from bar. Tests werevery good low cycle fatigue in the temperature range from run with fully reversed strainproperties at elevated tempera- 800°F (425°C) to 1600°F (R = -1) at a frequency oftures. Results shown below are (870°C). Samples were 20 cpm (0.33 Hz).2.52.0 -*wCDzzI(1)1.5 -1.00.90.80.70.60.5 -0.4 -x800°F (425°C)j*~discontinued0.3 -tl6000F (870°c)02I1 o3I10~CYCLES TO FAILURE10° 10~COMPARATIVE LOW CYCLE FATIGUE PROPERTIESThe graph below compares (760°C)/1 000 hour pre- again run with fully reversedthe low cycle fatigue lives of a exposed condition. Samples strain (R — 1) at a frequency ofnumber of alloys tested at were machined from plate or 20 cpm (0.33 Hz). TSR = Total800°F (425°C) in both the bar, after exposure for ex- Strain Range.as-received and 1400°Fposed samples. Tests were800°F (425°C) LCF Life for Various Alloys1 60TSR= 10%~50.5 .5woDLiir 40DTSR=065%—30oI—(1) s U)w tu 20-3o 010 —0 0188 230 X 625 617 188 230 X 625 617C As Received1400°F (760°C)/1000 Hr prior exposureHAYNES 188 alloy 10
OXIDATION RESISTANCEHAYNES® 188 alloy exhibits environments, and can be used sures of short duration, 188very good resistance to both air for long-term continuous expo- alloy can be used at higherand combustion gas oxidizing sure at temperatures up to temperatures.2000°F (1095°C). For expoCOMPARATIVE BURNER RIG OXiDATION RESISTANCE1000 HOUR EXPOSURE AT 1100°F (980°C)MetalLossAverageMetal AffectedMaximumMetal AffectedMaterial Mils pamMils pamMils pam230® alloy 0.8 20 2.8 71 3.5 89HAYNES® 188 alloy 35 89 4.2 107HASTELLOY X alloy 2.7 69 5.6 142 6.4 153625 alloy 4.9 124 7.1 180 7.6 193617 alloy 2.7 69 9.8 249 10.7 272Oxidation Test ParametersBurner r g ox dation tests were combustion of No. 2 fuel oil from the gas stream every 30conducted by exposing sam- burned at a ratio of air to fuel of minutes and fan-cooled to nearpIes 3/8 in. x 2.5 in. x thickness about 50:1. (Gas velocity was amb ent temperature and then(9 mm x 64 mm x thickness), in about 0.3 mach). Samples reinserted into the flame tunnel.a rotating holder, to products of were automatically removedCOMPARA1HVE BURNER RIG OXIDATION RESISTANCE AT 2000°F (1095°C) FOR 500 HOURSOXDATION DAMAGE100 200 300 400 500 600 700 800 900sMMaximum230® alloy Metal Internal188 alloyLossPenetrationx alloy617 alloy (>24 mils)625 alloy (>31 mils)5 10 15 20 25 30 35OXIDATION DAMAGE, MILSHAYNES 188 alloy
Page 4 and 5: CREEP AND STRESS-RUPTURE STRENGTHHA
Page 6 and 7: TYPICAL TENSILE PROPERTIESCOLD-ROLL
Page 8 and 9: TYPICAL PHYSICAL PROPERTIESTemp.,
Page 12 and 13: COMPARATIVE OXIDAT~ON RESISTANCE IN
Page 14 and 15: WELDINGHAYNES 188 alloy is readi yw
Page 16: STANDARD PRODUCTSBy Brand or Alloy

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