Material Matters

At Spectrographic as a metallurgical suppliers we offer re-calibration of Hardness Tester test blocks.  There are different types of hardness test reference blocks which relate to the testing for hardness.  These are Rockwell, Vickers, Micro Vickers, Knoop, Brinell and Leeb Test Blocks. The BS EN ISO 6507-3:2005 relates to metallic materials, Vickers hardness test and calibration of reference test blocks.  The extracted information of this standard Calibration of reference blocks appears in section 9 - Validity, it states: " The reference block is only valid for the scale for which it was calibrated. The calibration validity should be limited to a duration of 5 years.  Attention is drawn to the fact that, for Al- and Cu-alloys, the calibration validity could be reduced to 2-3 years". The question here is are all the test blocks valid that are currently been used for hardness testing within your metallurgy department.  This should become apparent...

Spectrographic are renown for selling metallurgical polishing machines, either brand new or refurbished . As a company we offer the full metallography consumable package. Our preparation polishing cloths have been sourced for quality and efficiency, and can easily be identified with other well known brands. The topic of this blog is to introduce our product range.  Our technical guys have put together a matrix of Polishing Cloths. Name of Polishing Cloth Description CIAR Soft, micro-porous cloth.  Chemical resistant low napped polymer pad. Excellent flatness and long durability (Pk 5) TARA A soft flocked cloth, semi finishing and finishing of all materials.   Diamond   3 or 1 mic (Pk 5) FLOCK Soft, dense and medium napped synthetic cloth on a plastic foil.    Provide excellent flatness and long durability 1 or 3 mic (Pk 5) MAIA Very soft flocked cloth, semi finishing and finishing of all materials. ...