DATA SHEET - Crucible Industries

1 A 2S7O1D2 Cru-CPM 3VM2 CPM M4 CPMT oughnessWear R esistancePunches and DiesWear PartsBlanking DiesShear BladesCoining DiesIndustrial Knives/SlittersForming DiesScrap ChoppersFineblanking DiesGaugesLamination DiesTablet Compression ToolingTrim DiesMold InsertsNote: These are some typical applications. Your specific application shouldnot be undertaken without independent study and evaluation for Modulus30 X 106psi(207 GPa) ( g/cm3)Thermal ConductivityBTU/hr-ft- F W/m- K cal/cm-s- Cat 200 F (95 C) 15 26 of Thermal Expansionin/in/ F mm/mm/ C70-500 F (20-260 C) X10-6( X10-6)70-800 F (20-425 C) X10-6( X10-6)70-1000 F (20-540 C) X10-6( X10-6)70-1200 F (20-650 C) X10-6( X10-6)Heat Treatment(1)Impact WearAustenitizing Toughness(2)Resistance(3)Temperature (J)AdhesiveCRUCIBLEA irkool (AISI A2)

2 Is an air-hardening medium alloy tool steelwhich is heat treatable to HRC 60-62. It has wear resistanceintermediate between the oil hardening tool steels (O1) andthe high carbon chromium tool steels (D2). Because it offersa combination of good toughness along with moderatewear resistance, ithas been widely used for many years invariety of cold work applications which require fairly highabrasion resistance but where the higher carbon/ highchromium steels are prone to chipping and is quite easily machined in the annealedconditionand, like other air-hardening tool steels, exhibits minimaldistortion on hardening, making it an excellent choice fordies of complicated design.

3 DATASHEETAIRKOOL Issue #1(AISI A2) (1) Heat Treatment: Austenitized as indicated and tempered to hardness. (2) Charpy C-Notch Impact Test(3) Crossed cylinder adhesive wear test (higher number = better wear resistance)The Crucible logo, Crucible , Airkool, CRU-WEAR, CPM, 3V and 10V areall trademarks of Crucible F (955 C)1750 F (955 C)1850 F (1010 C)1950 F (1065 C)1950 F (1065 C)2050 F (1120 C)2050 F (1120 C)2150 F (1175 C)605760626062626340125213070203214(53)( 165)(28)(40)(95)(27)(43)(19)2-313-45-678 -1020-2590 AirkoolS7 D2 Cru-WearCPM 3VM2 CPM M4 CPM 10 VTool Steel ComparagraphTypical ApplicationsMechanical PropertiesPhysical PropertiesMachinabilitySurface TreatmentsThe machinability of Airkool (A2)

4 As annealed is about50% of W1 tool (A2) can be given standard surface treatments suchas nitriding, TiN (titanium nitride) coating or hard chromeplating if desired. When using surface treatments, hardenfrom the high side of the austenitizing range and temper ator above the process temperature of the ValuesAirkool S7 O1 D2 Cru-CPM M2 CPM CPM (A2)Wear 3V M4 10V HRC 60 57 60 60 60 58 60 62 60 Crucible Industries LLC50556065RT300400500600700800900 1000 110020304050 Annealing:Heat to 1600 F (870 C), hold 2 hours, slowcool 50 F (30 C) per hour to 1200 F (650 C) then air cool.

5 OR heat to 1600 F (870 C), hold 2 hrs., cool to 1400 F(760 C) hold 6 hrs. then air Hardness: About BHN197/241 Heat Treat ResponseHardness and Impact Toughness DataAustenitized 1775 F (970 C) Air CoolTemperingCharpy C-NotchTemperatureHRCFt. Air Quenched 64300 F(150 C)62------400 F(205 C)61 31 42500 F (260 C)604156600 F (315 C)593750700 F (370 C)583345800 F (420 C)583142900 F (480 C)5829391000 F (540 C)5541561100 F (595 C)51------Results may vary with hardening method and section size. Vacuum or atmosphere coolingmay result in up to 1-2 HRC points RelievingAnnealed Parts:Heat to 1200-1250 F (650-675 C), hold2 hours, then cool in still Parts: Heat to 25-50 F (15-25 C) below theoriginal tempering temperature, hold 2 hours, then cool instill : Heat to 1100-1250 F (595-675 C), equalize,then to 1350-1450 F (730-790 C), :1750-1800 F (955-980 C), Hold time attemperature 30-45 :Air or positive pressure quench (2 bar minimum)to below 150 F (65 C) Temper: 400-1000 F (205-540 C).

6 Temper 2 hours minimum each time or at least 1 hour perinch (25mm) of thickness. Double Temper. Cool to roomtemperature in between tempers. Cryogenic Treating:Refrigeration after the first tempermay improve long term dimensional stability by transformingretained austenite. Any refrigeration treatment must befollowed by a Change:Hardening Tempering LongitudinalTemperature Temperature HRC Size Change1775 F (970 C) 400 F (205 C) 61 + F (970 C) 500 F (260 C) 59 + F (970 C) 600 F (315 C) 58 + : Properties shown throughout this data SHEET are typical values. Normalvariations in chemistry, size and heat treat conditions may cause deviations fromthese values.

7 WeldingUse air hardening tool steel filler Material:Preheat 700-900 F (370-480 C),maintain the temperature of the workpiece above 700 F(370 C) during welding. After welding, reanneal or temperat 1400 F (760 C) for 6 Material:Preheat 25-50 F (15-30 C) beloworiginal tempering temperature or 300 F (150 C) the temperature of the workpiece above 300 F(150 C) during welding. Cool to 150 F (65 C) after 25 F (15 C) below original tempering temperature. Thermal Treatments6560555050403020 Hardness, HRCC harpy C-Notch ( )Tempering Temperature F C21 150 205 260 315 370 425 480 540 595 HardnessToughnessRT 300 400 500 600 700 800 900 1000 1100 Crucible Industries LLC575 State Fair Blvd.

8 , Solvay, NY 13209 315-487-4111DS304 07/10 Airkool (A2) Crucible Industries LLC Printed in