H-13 ESR Mold Steel Data Sheet
Thermal TreatmentsPreheat : 1100/1250F (595/675C), equalize, 1350/1450F (775/790C), equalize.
Austenize : 1825/1875F (995/895C), 30/45 minutes at temperature.
Quench : Air, positive pressure vacuum to 150F (65C), Interrupted oil to 150F(65C). 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 (540/650C), hold 2 hours at temperature, air cool. Temper twice.
Cryogenic Treating : Refrigeration treatments may improve long term dimensional stability by transforming retained austenite. Refrigeration treatments should generally be performed after the first temper, and must be followed by a temper.
Hardness and Impact Toughness Data
Air cooled from 1850F(970C) Double tempered.
Surface TreatmentsBecause of its high tempering temperatures (>1000 F), H-13 ESR 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.
AnnealingA. Heat to 1600F (820C), hold 2 hours, slow cool 25F (0C)/hour maximum) to 1200F (650C), air cool.
B. Heat to 1600F (820C), hold 2 hours, cool to 1400F (760C), hold 6 hours, air cool to room temperature.
Typical annealed hardness: 192/235 BHN.
Stress RelievingAnnealed Material: Heat to 1200/1250F(650/675C), hold two hours, cool in still air.
Hardened Material: Heat to 25F(15C) below original tempering temperature, hold two hours, cool in still air.
WeldingUse H-11 or other hot work tool steel filler material.
Annealed Material:Preheat to 800/1000F(430/540C). Maintain above 700F(370C) during welding. Reanneal or temper 1400F(760C) for 6 hours after welding.
Hardened Material: Preheat to 800/1000F (430/540C) minimum. Maintain above 700F(370C) during welding. Cool to 150F(65C) after welding. Temper 25F(15C) below original tempering temperature. (1000F(540C) Minimum)