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PACE Technologies Metallographic Preparation CLASS Chart icon

Nickel Hastelloy Superalloy
Specimen Preparation (Class 6 Procedures)
Metallographic Class 6 sample preparation

Temperature and corrosion resistant materials such as Hasteloy Nickel Based Superalloys are prepared mostly with standard metallographic techniques. However, the results can be significantly improved by using finely graded CMP (chemical mechanical polish) polishing solutions on a high napped polishing pad.

SECTIONING
MAXCUT Abrasive blade (Cat. No. MAX-E or MAX-VHS series)

MOUNTING
Compression Mounting with Phenolic, Epoxy or Diallyl Phthalate compression mounting resins

POLISHING
Abrasive/surface Lubricant Force/ sample Speed
(Head/base)
Time Individual
Force mode
Central Force
mode
120 grit SiC paper*
240 grit SiC paper*
Water 5-10 lbs 200/200 rpm Planar
1 min
  Metallographic central polishing force
360 grit SiC paper
600 grit SiC paper
800 grit SiC paper
1200 grit SiC paper
Water 5-10 lbs 200/200 rpm 1 min
1 min
1 min
1 min
Metallographic individual polishing force Metallographic central polishing force
1 um DIAMAT diamond on
ATLANTIS polishing pad
DIALUBE Purple
Extender
5-10 lbs 200/200 rpm 2 min Metallographic individual polishing force Metallographic central polishing force
CMP polishing slurry on
MICROPAD polishing pad
(vibratory polishing is
recommended for final step)
  5-10 lbs 200/200 rpm

30-60 sec
(standard
polishers)

10-15 min
(vibratory
polishing)

Metallographic individual polishing force Metallographic central polishing force

*Required for central polishing force. Click here for more information on central vs. individual polishing force polishing.

Metallographic micrograph of Hastealloy
Hastelloy etched with Adlers etchant, Mag. 200X (DIC).
Composition: Molybdenum: 8-10%, Chromium: 20.5-23%,
Iron: 17-20%, Tungsten: 0.2-1%, Cobalt: 0.5-2.5%,
Carbon: 0.05-.015%, Silicon: 1%, Manganese: 1%,
Boron: 0.01%, Phosphorus: 0.04%, Sulfur: 0.03%,
Nickel: Remainder

ETCHING

Common Etchants
PACE Technologies Recommended Etchants

PACE Technologies Etchant Database

CAUTION:Safety is very important when etching. Be sure to wear the appropriate protective clothing and observe all WARNINGS on chemical manufacuters SDS (Safety Data Sheets). Also review the COMMENTS and CONDITIONS Section for each etchant.


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PACE Technologies
3601 E. 34th St.
Tucson, Arizona 85713
+1-520-882-6598
FAX +1-520-882-6599
email: pace@metallographic.com
www.metallographic.com


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Metallographic
Consumables

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Abrasive Blades
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Compression Mounting
Castable Mounting
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PACE Technologies ® - 3601 E. 34th St., Tucson, AZ 85713, USA
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