HAYNES ® 188 alloy - Haynes International, Inc.

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COMPARATIVE OXIDAT~ON RESISTANCE IN FLOWING A~R*Average Metal Affected in 1008 Hours”1800°F (980°C) 2000°F (1095°C) 2100°F (1150°C)Material Mils jim Mils jim Mils jim230®alloy 0.7 18 1.3 33 3.4 86HAYNES® 188 alloy 8.0 2036l7alloy 1.3 33 1.8 46 3.4 86HASTELLOY®Xalloy 0.9 23 2.7 69 5.8 147625 alloy 0.7 18 4.8 122 18.2 462Flowing air at a velocity of 7.0 ftimin. (213.4 cnvmin.) past the samples. samples cycled to room temperature once-a-week.• * Metal Loss + Average Internal Penetration.HOT CORROSION RESISTANCE AT 1650°F (900°C)HAYNES 188 alloy exhibits No. 2 Fuel oil with 0.4 percent cycled out of the gas streamexcellent resistance to sulfate sulfur. The air:fuel ratio was once-an-hour and cooled todeposit type hot corrosion. 30:1. Artificial sea water was near ambient temperature. GasTests were conducted in a low injected at a rate equivalent to velocity was 13 ft/sec. (4 mIs).velocity burner rig burning5 ppm salt. Tests were run for1000 hours, with samplesMetal LossAverage Metal AffectedMaterial Mils j.tm Mils jimHAYNES 188 alloy 0.8 2023Oalloy 1.2 30 5.1 130625 alloy 1.8 46 5.2 132HASTELLOYXaIIoy 1.6 41 5.5 140SULFIDATION RESISTANCE AT 1400°F (760°C)________HAYNES 188 al oy has very a gas mixture consisting of a severe test, with equilibriumgood resistance to gaseous 5 percent H2, 5 percent CO, su fur partial pressure of 106 tosulfidation envronments 1 percent CO , 0.15 percent 10 and oxygen partia presencountered in various indus- H2S and 0.1 percent H 0, bal- sures less than that needed totrial applications. Tests were ance Ar. Coupons were produce protective chromiumconducted at 1400°F (760°C) in exposed for 215 hours. This is oxide scales.1614°~o 120~~~ot=108642400300200 r100188 556 310 617 800H 625 xHAYNES 188 a oy 12
SCHEMATIC REPRESENTATION OF METALLOGRAPHJC TECHNIOUEUSED FOR EVALUATING ENVIRONMENTAL TESTSj Iv~rt:n.-0:‘E.~r1. Metal Loss = (A - 8)122. Average Internal Penetration = C3. Maximum Internal Penetration = D4. Average Metal Affected = ((A - 8)12) + C5. Maximum Metal Affected = ((A - 8)12) + DFABRICATION CHARACTERISTICSHEAT TREATMENTHAYNES 188 alloy is normallyfinal so ution heat-treated at2150°F (1175 C)for a timecommensurate with sectionthickness. Annealing duringtabricat on can be performed ateven lower temperatures, but afinal, subsequent solution heattreatment is needed to produceoptimum properties and structure. Please call HaynesInternational for further nformaton.EFFECT OF COLD REDUCT~ON UPON ROOM-TEMPERATURE PROPERTIES*%ColdReductionSubsequentTemperatureUltimateTensileStrength0.2% YieldStrengthElongationin 2 in. (51 mm)Ksi MPa Ksi MPa % Hardness0 137.2 945 66.9 460 54.2 RB 98.110 151.5 1045 105.9 730 45.1 R~32.120 None 165.9 1145 132.9 915 28.3 R~37.130 195.1 1345 167.0 1150 13.4 R~41.240 214.9 1480 176.8 1220 9.8 R~43.510 148.5 1025 91.2 630 41.4 R~29.720 1950°F 153.3 1055 87.8 605 41.0 R~27.830 158.3 1090 84.2 580 41.3 R~29.640 162.7 1120 90.8 625 39.8 R~31.110 143.0 985 64.7 445 50.1 R~21.920 2050°F 149.0 1025 71.4 490 47.2 R~24.511120°C~30 br s mir~ 155.2 1070 80.3 555 43.7 Ac 27.640 159.0 1095 86.9 600 43.2 Ac 29.510 139,6 965 61.9 425 55.3 RB95.620 2150°F 141.3 975 64.9 445 53.3 A9 97.130 142.8 985 66.5 460 51.8 RB 98.540 141.5 975 64.1 440 55.5 RB 97.2* Based upon rolling reduction taken upon 0.125 in. (3.2 mm) thick sheet. Duplicate tests.13 HAYNES 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 10 and 11: LOW CYCLE FATIGUE PROPERTIESHAYNES
Page 14 and 15: WELDINGHAYNES 188 alloy is readi yw
Page 16: STANDARD PRODUCTSBy Brand or Alloy

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