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Roughness ComparatorRoughness Comparator

Roughness Comparator

A precision nickel Comparator plate for grit and shot-blast surface roughness comparison measurement.

Relevant Standards: ISO 8503-1 , ISO 8503-2 and ASTM D4417

Ref: Roughness Comparator

Roughness Comparator - Ref: Roughness Comparator

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A precision nickel Roughness Comparator plate for grit and shot-blast surface roughness comparison measurement. When steel has been blast-cleaned, the surface consists of random irregularities with peaks and valleys that are not easily characterised. Because of this random nature, it is recommended that the profile should be identified as either angular (where grit abrasives have been used) or dimpled (where shot abrasives have been used) and that they should be graded as fine, medium or coarse using the four segments on the Comparator. Fine-grade profiles equal to segment 1 and up to but excluding segment 2.  Medium-grade profiles equal to segment 2 and up to but excluding segment 3. Coarse-grade profiles equal to segment 3 and up to but excluding segment 4. Supplied in a protective wallet In accordance with ISO 8503-1 , ISO 8503-2 and ASTM D4417

    
 	
  • Relevant Standards: ISO 8503-1 , ISO 8503-2 and ASTM D4417,
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  • The Roughness Comparator method is applicable to steel surfaces that have been blast-cleaned with either metallic or non-metallic abrasives to grades Sa 2½ and Sa 3 - when a mixture of shot and grit abrasives are used to blast-clean a substrate the Grit Surface Roughness Comparator should be used
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  • Profile Segment 1: Grit 25µm. Shot 25µm, Profile Segment 2: Grit 60µm. Shot 40µm, Profile Segment 3: Grit 100µm. Shot 70µm, Profile Segment 4: Grit 150µm. Shot 100µm
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  • Supplied in a protective wallet.
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