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Manufacturing
Manufacturing

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Appendix I Table of hardness values

Table 3: Typical Vickers hardness numbers for selected materials
MetalsVickers hardness number (HV) range from soft to hardCeramicsVickers hardness number (HV)PolymersVickers hardness number (HV)
Tin5Limestone250Polypropylene7
Aluminium alloys25–140Magnesium oxide500PMMA20
Gold35Tungsten carbide2500Polycarbonate14
Copper40Titanium nitride2900PVC16
Iron80Alumina2500Polyacetal18
Mild steel140–280Zirconia1300Polystyrene21
Ferritic stainless steel170–300Quartz1200CR3940
Martensitic stainless steel450–800Soda-lime silica glass490Urea Formaldehyde41
Ausstenitic stainless steel180–400Granite850Epoxy45
Tool steel700–1000Silicon nitride750Diamond10,000