ExELL™ D-2Download ExELL™ D-2 Spec sheet
ExELL™ D-2 is an air hardening die steel of the high carbon, high chromium type and alloyed with molybdenum and vanadium. An abundance of very hard, wear resisting alloy carbides imparts exceptional abrasion resistance to ExELL™ D-2.
ExELL™ D-2 is characterized by:
- Very good wear resistance
- High compressive strength
- Deep hardening
- High hardness response
- High dimensional stability after hardening and tempering
ExELL™ D-2 is used for tools requiring very high wear resistance, combined with only moderate toughness requirements. ExELL™ D-2 is used in a wide variety of tooling where long runs are anticipated.
- Blanking dies
- Coining dies
- Trimming dies
- Shear blades
- Cold extrusion tools
- Lamination dies
- Lathe centers
- Burnishing tools
- Draw dies
- Forming dies
- Thread rolling dies
- Piercing dies
- Deep draw dies
Coefficient of Thermal Expansion, in/in/F
400 F __________ 0.0000062
Thermal Conductivity, BTU in/ft2 hr F
70 F ___________ 140
400 F __________ 150
70 F ___________ 0.283
Modulus of Elasticity, psi
70 F ___________ 28,000,000
400 F __________ 27,000,000
Specific heat, Btu/lb F
70 F ___________ 0.11
With a protective atmosphere or vacuum furnace, heat slowly to 1550F. Equalize and hold one hour per inch of thickness. Furnace cool 20F/hr to 1000F and equalize. Air cool to room temperature. Hardness – 241 HB max.
To minimize movement during heat treatment, a stress relieve can be used between the rough and finish machine operations of tool making before heat treatment.
After rough machining, heat the part(s) to 1200F, equalize and hold 1–2 hours. Furnace cool to 900F and then air cool.
HARDENING AND QUENCHING
Preheating: Heat to 1200 – 1250F and equalize. Continue heating to hardening temperature.
Hardening: Protect against oxidation and decarburization. Austenitizing (hardening) temperature range is 1810 – 1920F but hardening is usually at 1875F.
Typical response is:
|Hardening Temperature||Hold Time*||As-Quenched Hardness|
|1825F||60 min||62 HRC|
|1850F||45 min||64 HRC|
|1875F||30 min||65 HRC|
*Hold time = time at temperature after tool is fully heated through.
Quenching: Typical quenching media include:
- Circulating air or atmosphere
- Forced air or gas
- Step quench
Temper immediately after quenching to about 150F.
Temper at least two times with a minimum 2 hour time for each temper. Select the tempering temperature based on required hardness. Typical tempering temperature responses are:
|Tempering Temperature||Hardness HRC (Austenitized 1740°F)|
Typical RT Tensile Strength:
|Hardness||Tensile Strength, psi||Yield Strength, psi|
Typical RT Compressive Strength:
|Hardness||Compressive Strength, psi||Compressive Yield Str., psi|
Our steel making expertise and capability is further enhanced from a long forging history with optimum forging and heat treating practices to develop very special material characteristics of product uniformity, cleanliness, machinability polishability, strength, toughness, hardenability and other steel properties. All this from production facilities certified to ISO 9002.
Ellwood Specialty Steel is committed to providing products and services which will consistently meet or exceed all quality and performance expectations. We will provide customer and technical service that will ensure complete satisfaction.
Being a very flexible integrated producer, Ellwood Specialty Steel will establish product programs to fully support industry or customer requirements. Our extensive stock programs are supported by very short mill lead times of custom forged products. Customized stock programs are and can be available for specific customer needs.
This information is intended to provide general data on our products and their uses and is based on our knowledge at the time of publication. No information should be construed as a guarantee of specific properties of the products described or suitability for a particular application. Ellwood Specialty Steel reserves the right to make changes in practices which may render some information outdated or obsolete. Ellwood Specialty Steel should be consulted for current information and/or capabilities.