Special Steels for Precise Die and Mold DUROF1 DUROF3 DUROF7High Toughness Grades DUROSPHigh Wear Resistance Grade For Cold Work R 1 Properties of DURO for Cold Work Typical Nachi Steel GradesDURO ID: 833255
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DURO for Cold WorkSpecial Steels for Pr
DURO for Cold WorkSpecial Steels for Precise Die and MoldDURO-F1DURO-F3DURO-F7High Toughness GradesDURO-SPHigh Wear Resistance GradeFor Cold WorkR1Properties of DURO for Cold WorkTypical Nachi Steel GradesDURO-Created by NACHIs original technologyDURO series, special steels for precise die and mold, are high quality and high grade materialswhich are made by NACHIs original technology of steel manufacturing and refining.They have less non-metallic inclusion and segregation that can cause fractures. Also showssuperior performance because of great control of carbide quantity and size.*Toughness=Resistance for crack initiation + Resistance for crack propag
ation : DURODURO-DURO-DURO-Conventional
ation : DURODURO-DURO-DURO-Conventional HSSConventional HSSHM35FAX38DURO-Wear Resistance Toughness€DURO for Cold Work has twotype grades, High Toughness€Each grade has a differentClassificationGradeApplicationHigh Speed Steels(HSS)Conventional HSSSKH9DDie and PunchHSU2CPlus PunchHM42Powder Metallugical HSSFAX SeriesAlloy Tool SteelsDie and Mold Steel for Cold WorkICS22Die for Eye GlassesMDS9Mold for RubberMCR1Die and PunchSteel for Precise Die and Mold(DURO Series)DURO-F1, 3, 7, SPCold Work Die and PunchDURO-F1, N1Hot Work Die and PunchPlastic Mold Steel with CorrosionResistance and Mirror FinishPROVA-400Plastic MoldCorrosion and Wear Resistan
ce Alloy SteelNPR1Injection Molding Ma
ce Alloy SteelNPR1Injection Molding Machine PartsFM ALLOYClassificationGradeHigh ToughnessHigh WearDURO-F1DURO-F3DURO-F7DURO-SP2Benefits of DURODURO is made by a highly purified procedure, to have high toughness and fatigue strengthQuantity and size of carbides in DURO microstructure are controlled to have a superior balanceof toughness and wear resistance.FM ALLOY isa brand name for NACHIs newest materialproducts. Made from NACHIs own technology toDURO isnamed from the Latin word which means hardŽDURO Series have thebest balance formicrostructure withminor segregation.PM HSSConventional HSSDie and Mold Steel forCold Work*Nital etching Ã
500*DURO-F1 is also good for hot work,
500*DURO-F1 is also good for hot work, please reference NACHI catalog DURO for Hot WorkŽ.DURO-F1DURO-F3DURO-F7DURO-SPHigh Toughness Steels56586062646668DURO-F1DURO-F3Bending Fracture Strength (GPa)56586062646668DURO-F1DURO-F7DURO-F3M2D2DURO-F1DURO-F3DURO-F7GoodDURO-F Series show superior charpy impactresistance in hardness range HRC 56-65.DURO-F Series show high bending fracture strength inGrindability of DURO-F Series is better than M2Mechanical PropertiesGrindability of DURO-F SeriesGround Ratio= (weight loss of a sample)/(weight loss of a wheel)High bending fracture strengthSuperior Charpy impact resistanceBetter grindability than other
materialSurface Grinder MachineWheel: WA
materialSurface Grinder MachineWheel: WA60KFeed: 60m/minRPM: 2000 min-1RequirementAus. [ C ( F)]Temp. [ C ( F)]Hardness (HRC)For toughness1100 (2012)For toughness1100 (2012)For toughness1120 (2048)DURO-F1DURO-F3DURO-F74500520540560580600620Aus.Temp. ( C)Tempering Temperature ( C)520540560580600620Aus.Temp. ( C)Tempering Temperature ( C)500520540560580600620Aus.Temp. ( C)Tempering Temperature ( C)Heat Treatment of DURO-F SeriesHeat treatment conditionHardness chart*Thickness of sample: 50 mm, vacuum furnace + pressure gas quenching (about 4 bar)*Hardness may vary depending on material size and method, condition or facilities
of heat treatment.DURO-F1DURO-F3DURO-
of heat treatment.DURO-F1DURO-F3DURO-F7Features of DURO-SP, High Wear Resistance SteelMechanical Properties0.00.51.01.52.02.53.03.54.0Wear Ratio Matrix HSSPM HSS(65HRC)M2(62HRC)DURO-SPSuperior wear resistanceMinimal loss of strength with rough surfaceStrength (GPa)23Worse surface DURO-SP01020304050600123Charpy Impact Resistance (J/cm2)Strokes of die performance (x104)DURO-SPWorse surface *Generally strength of materials decreases by notch effect as surface*Generally strength of materials decreases by notch effect as surfaceApplicationsGradeApplicationLife comparisonBlanking punch5 times longer than othermatrix HSSForming roll2 times longer than othe
rcold work die steelForming rack1.5 time
rcold work die steelForming rack1.5 times longer than othermatrix HSSFine-blanking punch4 times longer than othermatrix HSSFlow forming mandrel5 times longer than othermatrix HSSInjection die8 times longer than othermatrix HSSDURO-F1DURO-F3DURO-F7DURO-SPRequirementAus. [ C ( F)]Temp. [ C ( F)]Hardness (HRC)For toughness1120 (2048)DURO-SP6: Best: Good500520540560580600620Tempering Temperature ( C)Aus. Temp. ( C)DURO-SP can be used in range HRC 60-67.HRC 62-64 is normally recommended.Heat treatment of DURO-SPSample choices of steel grade for applications*Thickness of sample: 50 mm, vacuum furnace + pressure gas quenching (about 4 bar)*Hard
ness may vary depending on material size
ness may vary depending on material size and method, condition or facilities of heat treatment.Heat treatment conditionHardness chartCurrent GradeLife FactorRecommendationPM HSSWear, Micro chippingChipping, FractureM2Wear, Micro chippingChipping, FractureMatrix HSSWear, Micro chippingChipping, FractureD2Wear, Micro chippingChipping, FractureH13Wear, Micro chippingDURO-F1DURO-F3DURO-F7DURO-SP€The best heat treatment of DURO-SP differs depending on applications.€For fine blanking around HRC 64 is a standard hardness.€For flow forming mandrel HRC 60-62 is common and for some cold work forming punchs over HRC 67Hardness of DURO-SP2008.01.X-ABE-AB