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Brass (copper-zinc alloys) Specimen Preparation
(Class 1 Procedures)

Metallographic Class 1 sample preparation


Brass is a copper-zinc alloy, whereas bronze is a copper-tin alloy. Brass is stronger than copper and has a higher malleability then either copper and zinc. Brass is also a good conductor of heat, has excellent acoustic properties and is generally resistant to corrosion in salt water. Brass is commonly rolled and extruded; however, these processes also work harden and can be quanitified by metallographic analysis.

SECTIONING

MAXCUT Abrasive blade (Cat. No. MAX-C or MAX-I 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

P120 grit ALO paper*
P220 grit ALO paper*

Water

5-10 lbs

100/100 rpm

Until plane
1 minute

 

P500 grit ALO paper
P1200 grit ALO paper

Water

5-10 lbs

100/100 rpm

1 minute
1 minute

Metallographic individual polishing force

1 um DIAMAT diamond on ATLANTIS polishing pad

DIALUBE Purple Extender

5-10 lbs

100/100 rpm

2 minutes

Metallographic individual polishing force

0.05 um Nanometer alumina on NAPPAD polishing pad

 

5-10 lbs

100/100 rpm

1 minute

Metallographic individual polishing force

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

Brass microsctruture

70-30 Brass, 200X (B.F.), Etchant H2O2 / NH4OH

Cold rolled brass microsctruture

70-30 Brass cold rolled, 200X (B.F.), Etchant H2O2 / NH4OH

Deep rolled brass microsctruture

70-30 Brass deep rolled, 200X (B.F.), Etchant H2O2 / NH4OH

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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Tucson, Arizona 85713
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email: pace@metallographic.com
www.metallographic.com


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Metallographic
Consumables

Brochures:

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ordering
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Online Ordering
Abrasive Blades
Diamond Blades
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Polishing Pads
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MacroVickers Hardness Tester
Image Analysis



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