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PACE Technologies Metallographic Preparation CLASS Chart icon

Steel Welding
Specimen Preparation (Class 5 Procedures)
Metallographic Class 5 sample preparation  

Welding is the process of joining two or more pieces of metal together. The process can use filler materials to aid in the welding process. Since the welding process involves metaling and fusing the metals, the microsctructure and orientation and positioning of the weld are important metallurgical features that often require sampling to control the quality of the production process. Microstructural preparation and analysis of welded parts is relatively simple and use basic metallographic procedures.

SECTIONING
MAXCUT Abrasive blade (Cat. No. MAX-A or MAX-D series)

MOUNTING
Compression Mounting with Phenolic, Epoxy or Diallyl Phthalate compression mounting resins (if required)

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 GOLDPAD polishing pad
DIALUBE Purple Extender 5-10 lbs 200/200 rpm 2 min Metallographic individual polishing force Metallographic central polishing force
0.05 um Nanometer alumina
on TRICOTE polishing pad
  5-10 lbs 100/100 rpm 30 sec 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 Perfect Weld
Perfect Weld
Metallographic micrograph of carbon steel weld
Carbon Steel Weld, Mag. 50X, 2% Nital etch.

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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