Common Tradenames: Orvar® Supreme, Nu-Die XL
H-13 ESR is a premium version of H-13 melted by the electroslag remelt process. This process provides a more uniform and cleaner microstructure. These characteristics provide the user with better transverse toughness, polishibility and more resistance to thermal fatigue, which are especially important in die casting dies, plastic molds and extrusion tools. H-13 ESR may be used for tool temperatures up to about 1000 F, with brief exposures up to 1100 F.
|Extrusion Tools||Diecasting Dies|
|Plastic Molds||Ejector Pins|
|Powder Compaction Hardware|
Preheat : 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.
|Deg. F||Deg. C||HRC||Ft. Lbs.||Joules|
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)
|Modulus of Elasticity||30psix10(6)||(207 GPa)|
|Density||0.280 lb/in3||(7861 kg/M3)|
|Thermal Conductivity||15.5 BTU/hr./ft./F||29 W/m/ °K)|
Orvar is a registered trademark of Uddeholm Corporation