H-13 ESR Mold Steel Data Sheet

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.

Chemical Composition

Carbon 0.40%
Manganese 0.35%
Chromium 5.20%
Molybdenum 1.30%
Vanadium 0.95%

Typical Applications

Extrusion ToolsDiecasting Dies
Forging/Heading DiesMandrels
Plastic MoldsEjector Pins
Powder Compaction Hardware

Mold Steel Chart including H-13 ESR, S-7 ESR, 420 ESR, 440C and D-2

Thermal Treatments

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.

Tempering Toughness
Temperature HardnessCharpy V-Notch
Deg. FDeg. CHRCFt. Lbs.Joules
As quenched 54 - -
1000 540 5210 14
1050 560 50 10 14
1100 590 47 18 24
1125 605 41 18 24
1150 620 36 - -
1200 650 30 - -

Surface Treatments Because 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.

Welding Use 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)

Physical Properties
Modulus of Elasticity30psix10(6)(207 GPa)
Density0.280 lb/in3(7861 kg/M3)
Thermal Conductivity15.5 BTU/hr./ft./F29 W/m/ °K)

Orvar is a registered trademark of Uddeholm Corporation