NU-DIE® V(AISI H13)

NuDie V is the most popular, and perhaps most versatile, hot work tool steel, providing a good balance of toughness, heat check resistance, and high temperature strength, in addition to moderate wear resistance. It may be used for tool temperatures up to about 1000 F, with brief exposures up to 1100 F.

Typical Chemistry Carbon 0.40% Manganese 0.35% Silicon 1.00% Chromium 5.20% Molybdenum 1.30% Vanadium 0.95%

Typical Applications   Extrusion tooling Die casting dies   Bolsters Die inserts   Dummy Blocks Shot sleeves/Plungers   Mandrels Plastic Molds   Forging Dies Core Pins   Hot Upset Dies Ejector Pins

Hardening   Critical Temperature: 1560F   Preheat: 1100/1250F, equalize, 1450/1550F, equalize. High Heat: 1825/1875F, hold 30/45 minutes at temperature. Quench: Air, positive pressure vacuum, salt, or interrupted oil to 125/150F. NOTE: A minimum quench rate of about 25F per minute from 1800F down to about 1200F is recommended to achieve maximum impact toughness. Temper: 1000/1200F, hold one hour per inch of thickness (2 hours minimum). Air cool to room temperature. Temper twice.

Typical Properties Air cooled from 1850°F, double tempered as shown.   Tempering Temp.°F Hardness HRC CVN ft-lbs 1000 51-53 10 1050 49-51 10 1100 46-48 18 1125 40-42 18 1150 35-37 – 1200 28-32 –

Effect of Temperature on Impact Properties Air cooled from 1850F, double tempered to original hardness indicated, tested at elevated temperature as shown.

Original RT HRC Charpy V-Notch at (°F) RT 500 1000 1050 1100 52 10 22 25 25 – 47 18 30 33 – 32 43 18 38 44 – 42

Surface Treatments Because of its high tempering temperatures (>1000 F), NuDie V may be treated by most surface treating processes, including conventional and ion nitriding, titanium nitriding, and other coatings or treatments. Nitrided surface hardness will be about 60/65 HRC. Annealing Either process A or B is acceptable. A. Heat to 1600F. Hold 2 hours at temperature. Cool slowly (25F per hour maximum) to 1200F, then air cool to room temperature. or B. Heat to 1600F. Hold 2 hours at temperature. Cool to 1400F. Hold 6 hours at temperature, then air cool to room temperature. Typical annealed hardness - 192/235 BHN. Stress Relieving Annealed material: Heat uniformly to 1200/1250F, hold two hours at temperature, cool in still air to room temperature. Hardened material: Heat uniformly to 25/50F below tempering temperature, hold two hours, cool in still air to room temperature. Welding Use H11 or other hot work tool steel filler material. Annealed material: Preheat to 800/1000F. Maintain above 700F during welding. Reanneal, or temper 1400°F 6 hours. Hardened material: Preheat to 800/1000F. Maintain above 700F during welding. Allow to cool to hand warm (150F) after welding. Retemper at 25/50F below original tempering temperature (1000F minimum). Physical Properties Modulus of Elasticity ..................................................................30 psi x 106 Density ...........................................................................................0.280 lb/in3 Thermal Conductivity ................................... 200F..............15 BTU/hr/ft/°F                                         .....................................600F..............16 BTU/hr/ft/°F Thermal Expansion                            RT-200F......................................................6.1 x 10-6 in/in/°F                            RT-400F......................................................6.4 x 10-6 in/in/°F                            RT-800F......................................................6.8 x 10-6 in/in/°F                            RT-1000F....................................................7.0 x 10-6 in/in/°F                            RT-1200F....................................................7.3 x 10-6 in/in/°F

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