| SPEX SamplePrep Sample Container Materials Selection Chart | | | Typical Composition | | | | | Material | Major Element(s) | Minor Element(s) | Hardness | Resistance to Abrasion | Durability | Comparative Efficiency | | Hardened Steel | Fe | Cr, Si, Mn, C | Mohs 51/2-6 Rockwell-C 60-65 | Moderate | High | High | | Stainless Steel | Fe, Cr | Ni, Mn1, S1, Si2 | Mohs 51/2-6 Rockwell-C 60-65 | Moderate | High | High | | Tungsten Carbide | W, C, Co | Ta, Ti, Nb | Mohs 81/2 + Knoop 1400-1800 | High | Long-wearing, but subject to breakage | Very High | | Alumina Ceramic | Al | Si, Ca, Mg | Mohs 9 Rockwell-R45N 83 Knoop 2100 | Very High | Long-wearing, but brittle | Moderate | | Agate | Si | Al, Na, Fe, K, Ca, Mg2 | Mohs 6-7 Knoop 550-800 (est.) | Extremely High | Very Long-wearing, but brittle | Moderate | | Zirconia | Zr | Mg, Hf | Mohs 81/2 Rockwell-R45N 74-79 Knoop 1160 | Extremely High | Very long-wearing | High | | Silicon Nitride | Si | Y, Al, Fe, Ca | Mohs 81/2 + Knoop 1600 | Extremely High | Very long-wearing | Moderate | | Boron Carbide | B, C | Si, Fe, Al, Ca2 | Mohs 91/2 Knoop 2750 | Extremely High | Very long-wearing, but brittle | N/A | | Plastic | C | - | Mohs 11/2 (est) | Low | Low, but disposable | Low for grinding High for blending | 1 Possibly present
2 All reported less than 0.02% |
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