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Appendix I Table of hardness values

Table 3: Typical Vickers hardness numbers for selected materials

Metals Vickers hardness number (HV) range from soft to hard Ceramics Vickers hardness number (HV) Polymers Vickers hardness number (HV)
Tin 5 Limestone 250 Polypropylene 7
Aluminium alloys 25–140 Magnesium oxide 500 PMMA 20
Gold 35 Tungsten carbide 2500 Polycarbonate 14
Copper 40 Titanium nitride 2900 PVC 16
Iron 80 Alumina 2500 Polyacetal 18
Mild steel 140–280 Zirconia 1300 Polystyrene 21
Ferritic stainless steel 170–300 Quartz 1200 CR39 40
Martensitic stainless steel 450–800 Soda-lime silica glass 490 Urea Formaldehyde 41
Ausstenitic stainless steel 180–400 Granite 850 Epoxy 45
Tool steel 700–1000 Silicon nitride 750 Diamond 10,000

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