UDDEHOLM ARNE

1 UDDEHOLM ARNE SS-EN ISO 9001SS-EN ISO 14001 This 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 .Edition 7, Revised , not printedThe latest revised edition of this brochure is the English version,which is always published on our web site ARNE3 PropertiesPhysical dataHardened and tempered to 62 HRC.

2 Data atambient temperature and elevated C200 C400 C(68 F)(375 F)(750 F)Density kg/m37 800 7 7507 700 of elasticity N/mm2190 000185 000170 000 kp/mm219 50019 00017 500 tsi12 50012 20011 200 psi28 x 10627 x 10625 x 106 Coefficient ofthermal expansion per C from 20 C x x 10-6 per F from 68 F x 10-6 x 10-6 Thermal conductivity W/m C 32 33 34 Btu in/ft2 h F222229236 Specific heat J/kg C460 Btu/lb. GeneralUddeholm Arne general purpose oil-hardeningtool steel is a versatile manganese-chromium-tungsten steel suitable for a wide variety ofcold-work applications.

3 Its main characteristicsinclude: good machinability good dimensional stability in hardening a good combination of high surface hardnessand toughness after hardening and temperingThese characteristics combine to give a steelsuitable for the manufacture of tooling withgood tool life and production Arne can be supplied in variousfinishes including hot-rolled, pre-machined,fine-machined and precision ground. It is alsoavailable in the form of hollow strengthThe figures are to be considered approximate. Compressive and edging tool in UDDEHOLM Arne tool steelto clip and form edge of mm ( ") thickstainless steel container approx.

4 254 x 152 x 203 mm(10" x 6" x 8").ApplicationsTypicalCSiMnCrWVanalysis % AISI O1, Soft annealed approx. 190 HBColour code YellowTo ols forMaterial thicknessHRCC uttingBlanking, punching, up to 3 mm (1/8")60 62piercing, cropping,3 6 mm (1/8 1/4")56 60shearing, trimming 6 10 mm (1/4 13/32")54 56clippingShort cold shears54 60 Clipping and trimming tools Hot58 60for forgings Cold56 58 FormingBending, raising, drawing, rim rolling,spinning and flow forming56 62 Small coining dies56 60 Gauges, measuring toolsTu r ning centresGuide bushes, ejector pins, high duty,small/medium drills and tapsSmall gear wheels, pistons, nozzles, cams58 62 UDDEHOLM ARNE4 SurfaceTemp.

5 Of Holding time hardness prior Austenitizing martempering in tempering temperaturebath bath(obtained by C F C F minutesmartempering)8251520225435max. 564 2 HRC8251520200390max. 1063 2 HRC8251520180355max. 2062 2 HRC8501560225435max. 1062 2 HRCHeat treatmentSoft annealingProtect the steel and heat through to 780 C(1435 F). Then cool in the furnace at 15 C(27 F) per hour to 650 C (1200 F), then freelyin rough machining the tool should beheated through to 650 C (1200 F), holdingtime 2 hours. Cool slowly to 500 C (930 F)then freely in temperature: 600 700 C (1110 1290 F)Austenitizing temperature: 790 850 C (1450 1560 F) TemperatureSoaking* timeHardness before C Fminutestempering800147030approx.

6 65 HRC825152020approx. 65 HRC850156015approx. 63 HRC* Soaking time = time at austenitizing temperature after the tool is fully heated throughProtect the part against decarburization andoxidation during media Oil Martempering bath. Temperature 180 225 C(360 435 F), then cooling in airNote: Temper the tool as soon as its tempera-ture reaches 50 70 C (120 160 F).TemperingChoose the tempering temperature accordingto the hardness required by reference to thetempering graph. Temper twice with intermedi-ate cooling to room temperature. Lowesttempering temperature 180 C (360 F).

7 Hold-ing time at temperature minimum 2 sizeASTM10 8 6 4 2 760 780 800 820 840 860 880 C1400 1435 1470 1510 1545 1580 1615 F Austenitizing temperature Hardness, HRC66646260141210 8 6 4 2 Hardness, HRC Retained austenite %66646260585654525048464442403836 MartemperingTo ols at austenitizing temperature are im-mersed in the martempering bath for the timeindicated, then cooled in air to not lower than100 C (210 F). Temper immediately as temperature Retained austenite850 C (1560 F)820 C(1510 F)790 C(1455 F)

8 TEMPERING GRAPH 100 200 300 400 500 600 700 C 212 392 572 752 932 1112 1292 F Tempering temperature Holding time 60 sizeRetained austeniteHolding time20 AS A FUNCTIONOF HARDENING TEMPERATURE1 Restaustenit, %40302010 Above tempering curves are obtained after heat treatment ofsamples with a size of 15 x 15 x 40 mm, quenched in hardness can be expected after heat treatment oftools and dies due to factors like actual tool size and heattreatment ARNE5 WidthLength Thickness%% %Oil hardening from830 C (1530 F)min.

9 + + max.+ + + from830 C (1530 F)min.+ + max.+ + + changes duringhardeningSample plate, 100 x 100 x 25 mm, 4" x 4" x 1"Note: The dimensional changes on hardeningand tempering should be added allowance %.Dimensional change %+ ,2100 200 300 C200 400 600 F Tempering temperatureSub-zero treatment and agingPieces requiring maximum dimensional stabilityshould be sub-zero treated and/or artificiallyaged, as volume changes may occur in thecourse of time. This applies, for example, tomeasuring tools like gauges and certain struc-tural TREATMENTI mmediately after quenching the piece shouldbe sub-zero treated to between -70 and -80 C(-95 to -110 F), soaking time 3 4 hours,followed by tempering or aging.

10 Sub-zero treat-ment will give a hardness increase of 1 3 intricate shapes as there will be risk after quenching is replaced byageing at 110 140 C (230 285 F). Holdingtime 25 100 tool made from fine-machinedUddeholm Arne tool changes duringtemperingSample plate, 100 x 100 x 25 mm, 4" x 4" x 1" UDDEHOLM ARNE6 Soft annealedHardenedType of grindingconditionconditionFace grindingstraight wheelA 46 H VA 46 H VFace grinding segmentsA 24 G VA 36 G VCylindrical grindingA 46 L VA 60 K VInternal grindingA 46 J VA 60 I VProfile grindingA 100 L VA 120 J VMachiningrecommendationsThe following tables give machining data forUddeholm Arne in soft annealed 190 HB.