UDDEHOLM ORVAR SUPREME

1 UDDEHOLM ORVAR SUPREMESS-EN ISO 9001SS-EN ISO 14001 Edition 8, Revised , not printedThe latest revised edition of this brochure is the English version,which is always published on our web site ORVAR SUPREMEU ddeholm ORVAR SUPREME can be regarded as an all-round steel usedin several application areas. Except for hot work application areas thesteel is also used in moulds for plastics and as a material in highstressed high degree of purity and the very fine structure showsimprovement in dies and components where high mechanical andthermal stresses are information is based on our present state of knowledge and is intended to provide generalnotes on our products and their uses. It should not therefore be construed as a warranty ofspecific properties of the products described or a warranty for fitness for a particular according to EU Directive 1999/45/ECFor further information see our Material Safety Data Sheets.

2 UDDEHOLMS ABNo part of this publication may be reproduced or transmitted for commercial purposeswithout permission of the copyright ORVAR SUPREME3 ApplicationsTools for die castingAluminium,CopperStainlessmagnesiu malloyssteelPartalloys, HRCHRCHRCDies44 5043 4745 50 Backers, die-holders, liners,dummy blocks,stems41 5040 4840 48 Austenitizingtemperature1020 1030 C 1040 1050 C(approx.)(1870 1885 F) (1900 1920 F)Tools for hot pressingTools for extrusionTin, leadAluminium,Copperzinc alloysmagnesiumalloysPartHRCalloys, HRCHRCDies46 5042 48(QRO 90 S)Fixed insertscores46 5244 48(QRO 90 S)Sprue parts48 5246 48(QRO 90 S)Nozzles35 4242 48(QRO 90 S)Ejector pins(nitrided)46 5046 5046 50 Plunger,shot-sleeve(normallynitrided)42 4642 48(QRO 90 S) austenitizing 1020 1030 C1040 1050 Ctemperature (1870 1885 F)(1900 1920 F)TypicalCSiMnCrMoVanalysis % AISI H13, annealed to approx.

3 180 HBColour codeOrangeMaterialAust. temp. (approx.)HRCA luminium,magnesium1020 1030 C (1870 1885 F)44 52 Copper alloys1040 1050 C (1900 1920 F)44 52 Steel1040 1050 C (1900 1920 F)40 50 GeneralUddeholm ORVAR SUPREME is a chromium-molybdenum-vanadium-alloyed steel which ischaracterized by: High level of resistance to thermal shockand thermal fatigue Good high-temperature strength Excellent toughness and ductility in alldirections Good machinability and polishability Excellent through-hardening properties Good dimensional stability during hardeningImproved tooling performanceThe name SUPREME implies that by specialprocessing techniques and close control, thesteel attains high purity and a very fine struc-ture. Further, UDDEHOLM ORVAR Supremeshows significant improvements in isotropicproperties compared to conventionally pro-duced AISI H 13 improved isotropic properties areparticularly valuable for tooling subjected tohigh mechanical and thermal fatigue stresses, die casting dies, forging tools and extrusiontooling.

4 In practical terms, tools may be used atsomewhat higher working hardnesses (+1 to2 HRC) without loss of toughness. Since in-creased hardness slows down the formation ofheatchecking cracks, improved tool perform-ance can be ORVAR SUPREME meets the NorthAmerican Die Casting Association (NADCA)#207-2008 for premium high quality H-13 ORVAR SUPREME4 APPROXIMATE STRENGTHAT ELEVATED TEMPERATURESL ongitudinal , HRC504540353025201 10 100 1000 Time, hoursEFFECT OF TIME ATHIGH TEMPERATURES ON HARDNESSM oulds for plasticsOther applicationsPartAustenitizing moulds1020 1030 C (1870 1885 F)Compression/transfer mouldsTempering1. 550 C (1020 F) or40 522. 250 C (480 F)50 53 ApplicationAustenitizing coldpunching,1020 1030 C (1870 1885 F)scrap shearsTempering 250 C (480 F)50 53 Hot shearing1020 1030 C (1870 1885 F)Tempering 1.

5 250 C (480 F) or50 53 2. 575 600 C45 50 (1070 1110 F)Shrink rings( for1020 1030 C (1870 1885 F)cementedTempering 575 600 C45 50carbide dies)(1070 1110 F)Wear-1020 1030 C (1870 1885 F)Coreresisting partsTempering 575 C (1070 F)50 52 NitridingSurface~1000HV1 600 C(1110 F) 650 C(1200 F) 500 C (930 F) 550 C(1020 F)PropertiesAll specimens are taken from the centre of a407 x 127 mm (16" x 5") bar. Unless otherwiseis indicated all specimens were hardened 30minutes at 1025 C (1875 F), quenched in airand tempered 2 + 2 h at 610 C (1130 F). Thehardness were 45 1 dataData at room and elevated temperatures. 100 200 300 400 500 600 700 C 210 390 570 750 930 1110 1290 F Testing temperaturepsi Rm, MPa2902000261180023216002031400174120014 51000116 800 87 600 58 400 29 200A5,Z %100 90 80 70 60 50 40 30 20 10 ZRmA5Rp0,2 Temperature20 C400 C600 C(68 F)(750 F)(1110 F)Densitykg/m37 8007 7007 600 ofelasticityMPa210 000180 000140 x x x 106 Coefficient ofthermal expan-sion per C from 20 C x x 10-6 F from 68 F x 10-6 x 10-6 ThermalconductivityW/m C 25 29 30 Btu in/(ft2h F)

6 176204211 mechanical propertiesApproximate tensile strength at 52 HRC45 HRCT ensile strength 1820 MPa 1420 MPaRm 185 kp/mm2 145 kp/mm2 117 tsi 92 tsi263 000 psi206 000 psiYield strength 1520 MPa 1280 155 kp/mm2 130 kp/mm2 98 tsi 83 tsi220 000 psi185 000 psiUDDEHOLM ORVAR SUPREME5 100 200 300 400 500 C 210 390 570 750 930 F TemperatureSoaking* time Hardness before C F minutestempering 10251875 3053 2 HRC10501920 1554 2 HRC* Soaking time = time at hardening temperature after the tool is fully heated throughProtect the part against decarburization andoxidation during hardening. Impact energy, J100 80 60 40 20 0 Stress relievingAfter rough machining the tool should beheated through to 650 C (1200 F), holdingtime 2 hours.

7 Cool slowly to 500 C (930 F),then freely in temperature: 600 850 C (1110 1560 F), normally in two pre-heating temperature: 1020 1050 C (1870 1920 F), normally 1020 1030 C (1870 1885 F).EFFECT OF TESTING TEMPERATUREON IMPACT ENERGYC harpy V specimens, short transverse treatment general recommendationsSoft annealingProtect the steel and heat through to 850 C(1560 F). Then cool in the furnace at 10 C(20 F) per hour to 650 C (1200 F), then freelyin HRCCCT GRAPHA ustenitizing temperature 1020 C (1870 F). Holding time 30 lbs7459443015 Testing temperature200018001600140012001000 800 600 400 200 F7 Austenitiseringstemperatur 1020 CH lltid 30 minuterfA1c= 950 C= 870 CsA1c1 MartensitPerlitKarabiderMfMsSekunder1 10 100 1 000 10 00011001000900800700600500400300200100 C110 1001 000110 MinuterLuftkylning avst nger, mm0,21,51090 TimmarBainit2345861234567868162060660158 5560537473 HardnessHV 10T800 cooling ofbars mmUDDEHOLM ORVAR SUPREME6 Hardness,HRC6055504540353025 Hardness, HRC6058565452504846444240 Retained austenite %642100200 300 400 500 600 700 C210 390 570 750 930 1110 1290 F Tempering temperature (2h + 2h)

8 TemperingChoose the tempering temperature accordingto the hardness required by reference to thetempering graph. Temper minimum twice withintermediate cooling to room tempering temperature 250 C (480 F).Holding time at temperature minimum 2 avoid temper brittleness , do not temperin the range 425 550 C (800 1020 F), GRAPHA ustenitizing temperatureRetained austenite %642 HARDNESS, GRAIN SIZE ANDRETAINED AUSTENITE AS FUNCTIONS OFAUSTENITIZING TEMPERATURE 10 8 6 4 Quenching media High speed gas/circulating atmosphere Vacuum (high speed gas with sufficientpositive pressure). An interrupted quench isrecommended where distortion control andquench cracking are a concern Martempering bath or fluidized bed at450 550 C (840 1020 F), then cool in air Martempering bath or fluidized bed atapprox. 180 220 C (360 430 F) then coolin air Warm oilNote 1: Temper the tool as soon as itstemperature reaches 50 70 C (120 160 F).

9 Note 2: In order to obtain the optimum prop-erties for the tool, the cooling rate should befast, but not at a level that gives excessivedistortion or sizeRetained austenite 1050 C (1920 F) 1025 C(1875 F) 1020 C(1870 F) Retained austenite 1000 1020 1040 1060 C 1830 1870 1905 1940 F Grain size ASTMA bove tempering curves are obtained after heat treatment ofsamples with a size of 15 x 15 x 40 mm, cooling in forced hardness can be expected after heat treatment oftools and dies due to factors like actual tool size and heattreatment ORVAR SUPREME7 Nitriding to case depths > mm (> inch)is not recommended for hot work ORVAR SUPREME can be nitrided inthe soft-annealed condition. The hardness anddepth of case will, however, be reduced some-what in this IMPACT STRENGTH AT DIFFERENTTEMPERING TEMPERATURESC harpy V specimens, short transverse direc-tion.

10 100 200 300 400 500 600 700 210 390 570 750 930 1110 1290 Tempering temperature (1h + 1h)Dimensional change %+0,12+0,08+0,04 0 0,04 0,08 0,12 Dimensional changesduring temperingNote: The dimensional changes in hardeningand tempering should be changesduring hardeningTempering within the range 425 550 C (800 1020 F) is normally not recommended due tothe reduction in toughness and nitrocarburizingNitriding and nitrocarburizing result in a hardsurface layer which is very resistant to wearand erosion. The nitrided layer is, however,brittle and may crack or spall when exposed tomechanical or thermal shock, the risk increas-ing with layer thickness. Before nitriding, thetool should be hardened and tempered at atemperature at least 25 50 C (45 90 F) abovethe nitriding in ammonia gas at 510 C (950 F)or plasma nitriding in a 75% hydrogen/25%nitrogen mixture at 480 C (895 F) both resultin a surface hardness of about 1100 general, plasma nitriding is the preferredmethod because of better control over nitro-gen potential; in particular, formation of theso-called white layer, which is not recom-mended for hot-work service, can readily beavoided.