COLD WORKING TOOL STEELS - Hitachi Metals

COLD WORKING TOOLSTEELS1

COLD WORK TOOL STEELSFor high performance serviceAbrasion resistance, StrengthCharacteristics of YSS Cold Work Tool SteelsHAP72XVC5P/M high speed rasion resistanceS-MAGICSLDSLD8Air hardened steelACD37YXR7HAP5RMatrix high speed steelYXR3ARK1ToughnessYXR33 DACExcellent machinabilitySGTFlame hardend steelYCS3Simplified smallproductionFree cutting andpre-hardened steelDACToughness Comparison of istanceStrengthat RK1B A–ABAAA B A–A–A–ACDSLD8HardenabilityDistortionby heattreatmentMachinability WeldabilityStandardhardness(HRC)A A A A A–B58 62BC57 63A A A AB58 60AB C58 63AB–C59 65CA B–B57 63DDCA DCB57 63CRDA–A YCS3DSGTCCB DBAB57 63BA–CBCA DACD37AAB55 60HMD5HMD1CBDB——AA55 60HPM1HPM2TD–DDA–——A–A40YXM1AAA–BBBC58 64YXM4A A A A BBC62 66XVC5A A CBCD63 67YXR7AA A BB–B–AAABBA–AABBBA A A A ABB B CC 61 65YXR3C 54 58AA AABC58 62AB–C62 65AC C64 67AC–D68 71SLD10YXR33BHAP5RAHAP10A AAHAP40A A A A A–HAP72A A A CABA–(A is the uppermost level and indicates higher performance)258 61

COLD WORK TOOL STEELSApplications and YSS grade FeaturesYSSgradeMain applicationsFeaturesS-MAGIC(NEW)Cold work dies for high-tensile steels,SUS, mass production, and general use.High performance cold work tool steel attaining both extended moldlifespan and outstandingly easy mold fabrication. 60 62 HRC withhigh temperature. tempering. Excellent wear & galling resistance.SLDCold work dies for general use, formingroll, shear.Cold work die steel with high abrasion resistance for general use,excellent harden-ability and minimal quench stress.ARK1Dies for printed circuit board,die plates, stripper plates.Cold work die steel with high toughness and improved machinability.The same heat treatment conditions as SKD11.SLD8Rolling dies, cold forging dies.62HRC or more with high temperature tempering, superiormachinability and toughness.SLD10Rolling dies.Extremely highest hardness in die steels.62-64HRC, with excellent toughness.CRDDrawing dies, blanking dies for massproduction, brick liner.Cold work die steel with highest abrasion resistance.YCS3Press forming dies, jigs and tools.Carbon tool steel for small production to be quenched in oil , easy toheat-treat.SGTDies for deep drawing, gauges.Cold work die steel with superior machinability for generaluse; Be carefulwith quenching large dies and wire electric discharge machining.ACD37Dies for deep drawing, gauges.Vacuum quenched and air quenched steel, improved for SGT as tohardenability and wire electric discharge machinability.HMD5HMD1Dies for deep drawing.Steel for flame hardening, resulting in high hardness and small straineven with air quenched; good weldability.HPM1Press forming dies for small production,jigs and tools.Free cutting and fully hardened steel, good nitriding characteristics.YXM1Cold forging dies,cold heading dies, slitter.High speed steel with high abrasion resistance and toughness forgeneral use.YXM4XVC5Cold forging dies, drawing dies.High speed steel to prevent from abrasion, seizure and deformationunder high pressure.YXR7Rolling dies, cold forging dies, roll, coldforging panches, blanking panches.Matrix high speed steel, extremely highest toughness in 62-65HRC.available to vacuum quenching.YXR3Dies to be used for cracking or chipbreaking resistance.Matrix high speed steel for general use, extremely highest toughnessin 58-61HRC.YXR33Cold forging dies,warm forging dies.Matrix high speed steel extremely highest toughness in high speedsteels.HAP5RCold forging dies, fine blanking dies.Standard hardness 56-58HRC.Extremely tough Powder Metallurgy process high speed steel.HAP10Fine blanking dies.Extremely tough Powder Metallurgy process high speed steel.HAP40Press forming dies for mass production,roll.P/M high speed steel with high abrasion resistance and toughnessfor general use.HAP72Cold plastic working dies of long life,high performanced IC molds.P/M high speed steel with high hardness and highest abrasionresistance.3

Type and Chemical CompositionsGradeYSSS-MAGICSLDJIS equivalentChemical Composition (%)CSiMnSNiCrWMoVCo–1.000.35–High performance cold work tool steelPatent pendingSKD11P1.500.250.45 0.025 0.010–12.00ARK1Patented steelHigh toughness cold work tool steelSLD8Patented steelHigh strength cold work tool steelCRDSKD12.100.250.45 0.025 0.010–13.50––––YCS3SKS931.050.350.80 0.030 0.030–0.40––––SGTSKS30.950.251.05 0.025 0.010–0.750.75–––0.850.252.10 0.025 0.010–1.20–1.50––ACD37HMD5Flame hardened tool steelOriginal steelCOLD WORK TOOL STEELSHMD1HPM1Patented steel0.120.300.90 0.025 0.103.00––0.30Cu2.2Al1.0YXM1SKH510.850.250.35 0.025 0.010–4.156.505.302.05–YXM4SKH550.850.250.35 0.025 0.010–4.156.505.302.055.00XVC5SKH571.250.250.35 0.025 0.010–4.1510.003.503.4510.00YXR7Original steelMatrix high speed steelPatented steelExtremely tough matrix high speed steelYXR3YXR33HAP5RP/M highHAP10speed .3–––––4.06.05.03.08.0HAP72Patented steel2.1–––––4.09.58.25.09.5Extremely tough P/M high speed steel4

Heat Treatment(1)Annealing(2)Holding time at hardening temperature1. All material is delivered as spheroidized annealedcondition.2. When used after reforging, spheroidized annealing isto be done before hardening.3. Stress relief annealing is to be done in order toremove stress occured by cold working such as colddrawing, cold rolling or cutting and machining. Heating temperature: 650-700 C Holding time: 1h/25mm thickness High speed tool steel1. Preheating time 1st stage: 30 minutes for every25 mm of the tool at 500-550 C2nd stage: (holding time X 2) at 850 C3nd stage: (holding time X 2) at 1,050 CPreheating is (holding time X 2) at 900 C for small thickness (50mm max.) and simple shape tools, and wherever facilities are limited.The first stage can be omitted for small tools.2. Holding time at hardening temperature (holding time)Thickness (mm)Furnace type5102030405060708090Holding time (sec)6090160240280350390420440495Thickness X multipleX12X9X8X8X7X7X6.5X6X5.5X5.5TimeNote: Use the holding time in the salt bath as the immersion time. Cold die steels, alloy tool steels and carbon tool steels1. Preheating time 1st stage: (holding time X 2) at 500-550 C2nd stage: (holding time X 1) at 750-800 C(Unnecessary for SK, SKS)Except that preheating can be omitted wherever an electric furnace is used or for small tools (50mm or less thickness) and simpleshape tools.2. Holding time at hardening temperature (holding time)Furnace typeSalt bath orelectric furnaceThickness (mm)TimeHolding time (min) 152550751001251502003001525405060657080100Note: Using salt bath needs preheating and the holding time used as the immersion time.(3)Holding time at tempering temperatureThickness (mm)Holding time fortempering (h) 2526 3536 6465 8485 124125 174175 249250 349350 49911.52345678Note: Apply this standard to tempering at 500 C or more, and increase elongate tempering time to tempering temperature X 1.5 for 250-500 Cand holding time X 2 for tempering temperature less than 250 C(4)Dimensional changes after heat treatment0.25Radial directionDimensional change rate (%)COLD WORK TOOL STEELSSalt bath0.20Longitudinal direction0.150.100.050S-MAGIC SLDARK1SLD8ACD371,025 C 1,025 C 1,025 C 1,025 C850 C505 C 200 C520 C530 C200 CSGT825 C200 CYCS3YXM1YXR7YXR3YXR33 HAP10 HAP40800 C 1,200 C 1,160 C 1,150 C 1,140 C 1,130 C 1,130 C Hardening temperature200 C575 C560 C570 C580 C570 C570 C Tempering temperature5

Heat Treatment(5) Standard heat treatment conditionsAnnealingTemperature ( C)HardeningHardness(HBW)TemperingTemperature ( C)Temperature ( C)Hardness(HRC)480 530 Air cooling 60S-MAGIC830-880Slow cooling 255SLD830-880Slow cooling 2481010-1040Air quenching1000-1050 (980-1030)Air quenching (Oil quenching)150 200 Air cooling 58ARK1830-880Slow cooling 2481010-1040Air quenching480 530 Air cooling 58SLD8830-880Slow cooling 248520 550 Air cooling 60CRD830-880Slow cooling 2481020-1040Air quenching930-980 (950-1000)Oil quenching (Air quenching)150 200 Air cooling 61YCS3750-780Slow cooling 212790-850Oil quenching150 200 Air cooling 63SGT750-780Slow cooling 217800-850Oil quenching150 200 Air cooling 60ACD37750-800Slow cooling 235830-870Air quenching150 200 Air cooling 58HMD5 / HMD1825-875Slow cooling 235Flame hardening550 570 Air cooling 63560 580 Air cooling 64550 580 Air cooling 64550 580 Air cooling 61YXM1800-880Slow cooling 255YXM4800-880Slow cooling 277XVC5820-880Slow cooling 285YXR7800-880Slow cooling 241YXR3800-880Slow cooling 241(1)1220-1240 (2)1200-1220Oil quenching(1)1230-1250 (2)1210-1230Oil quenching(1)1230-1250 (2)1210-1230Oil quenching(1)1160-1180 (2)1120-1160Oil quenching(1)1150-1170 (2)1130-1150Oil quenching560 590 Air cooling 58YXR33800-880Slow cooling 2411080-1160Oil quenching550 600 Air cooling 55HAP5R820-870Slow cooling 269530 580 Air cooling 58HAP10820-870Slow cooling 269530 580 Air cooling 61HAP40820-870Slow cooling 2771120-1160Oil quenching(1)1170-1190 (2)1120-1170Oil quenching(1)1190-1210 (2)1120-1190Oil quenching560 580 Air cooling 64HAP72820-870Slow cooling 3521180-1210Oil quenching560 580Air cooling 68(1) Simple shape tools(2) The others, especially needs toughness*Sample size is 15mm square or round and 20mm length based on the JIS Standard hardness test.(6) Hardenability(Half temperature time: time requred to cool fromthe austenitizing temperature to half that temperature){(austenitizing temperature room temperature) / 2}7060Maximum diameter of bar for which the centerhardness of 60HRC can be achievedYXR7(1,180 C)SGT(850 C)50CRD(980 C)YXM1(1,180 C)SLD(1,025 C)XVC5(1,230 C)40Hardness(HRC)COLD WORK TOOL STEELSYSS grade3020101.08ø20ø70ø180ø 2.03.0 4.0 6.0 8.0 10170ø203040 550ø6080 100Half temperature time (min)6200400600 8001,000[ :air quenching,:oil quenching]

Quenched and tempered hardness curveS-MAGICARK1SLD7070701,050 C1,050 C65651,010 C60Hardness (HRC)551,000 C55555050454545040100 200 300 400 500 600Tempering temperature ( C)CRD400 100 200 300 400 500 600Tempering temperature ( C)1,030 C6050400100 200 300 400 500 600Tempering temperature ( C)SGTYCS3707070(Oil quenching)(Oil quenching)1,000 C850 C925 C4030YCS3(820 C Oil quenching)50Hardness (HRC)975 C506060Hardness (HRC)Hardness (HRC)60300 100 200 300 400 500 600800 C825 C504040300Tempering temperature ( C)ACD37100200300400Tempering temperature ( C)YXM168686666100 200 300 400 500HAP5R681,240 C1,220 C661,180 C1,200 C646460880 C621,180 C60Hardness (HRC)855 CHardness (HRC)64621,160 C1,140 C62601,160 C585858565656540Tempering temperature ( C)830 CHardness (HRC)COLD WORK TOOL STEELS1,025 C60Hardness (HRC)Hardness (HRC)1,030 C651,120 C1,100 C100200300Tempering temperature ( C)54500 520 540 560 580 600 620Tempering temperature ( C)754500 520 540 560 580 600Tempering temperature ( C)

Quenched and tempered hardness curveYXR7YXR33YXR3706662646062581,160 C661,160 C1,140 C64Hardness (HRC)Hardness (HRC)1,180 C621,120 C1,175 C1,150 C1,125 C605856Hardness (HRC)681,140 C561,120 C54525450524850466048500 520 540 560 580 600665506004470058561,025 C701,160 C1,180 C6866Hardness (HRC)6462520 540 560 580 600Tempering temperature ( C)1,200 C1,220 C6664601,100 C1,075 C1,050 C1,025 C585452650HAP721,200 C1,180 C1,160 C1,140 C1,120 C68Hardness (HRC)1,100 C1,075 C1,050 C600726460550Tempering temperature ( C)701,200 C1,180 C1,160 C1,140 C1,120 C62500HAP40HAP107068500Tempering temperature ( C)Tempering temperature ( C)Hardness (HRC)COLD WORK TOOL STEELS5856520 540 560 580 600Tempering temperature ( C)86260500 520 540 560 580 600Tempering temperature ( C)