Material-Specific Preparation Guide
Comprehensive guide covering preparation techniques for various material types including grinding, polishing, and etching recommendations.
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Get a printable guide with material-specific preparation procedures for common metals and alloys.
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Carbon Steel / Low Alloy Steel
Grinding: Start with 120 grit SiC, progress through 240, 400, 600 (800 and 1200 optional for high-quality work or high-magnification analysis)
Polishing: 9μm → 3μm → 1μm diamond, final with 0.05μm colloidal silica
Etching: 2-5% Nital or Picral, depending on structure to reveal
Notes: Standard preparation sequence, adjust grits based on hardness. Use 800/1200 grit for very fine finishes or when preparing for high-magnification analysis.
Stainless Steel
Grinding: Start with 120 grit, progress through 240, 400, 600 (800 and 1200 optional for high-quality work or high-magnification analysis)
Polishing: 9μm → 3μm → 1μm diamond, final with 0.05μm colloidal silica
Etching: Vilella's Reagent, Adler's, or Kallings No. 2 depending on grade
Notes: Work-hardening material, use consistent moderate pressure. Use 800/1200 grit for very fine finishes or high-magnification analysis.
Aluminum & Aluminum Alloys
Grinding: Start with 120 grit, progress through 240, 400, 600
Polishing: 9μm → 3μm → 1μm diamond, final with 0.05μm colloidal silica
Etching: Keller's Reagent or Al-NaOH etchant
Notes: Soft material, use shorter times and lighter pressure to avoid smearing
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