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Brinell Hardness Number, BHN

The Brinell hardness test depends upon the resistance offered to the penetration of a steel ball (1.6 mm diameter) when subjected to a weight of 12.6 kg. The resulting hardness value is computed as the ratio of the applied load to the area of the indentation produced.

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                                                  BHN
Material                    Product           (kg/sq. mm)    Ref.
_________________________________________________________________
Cobalt-chromium alloy       Genesis II           265            9
Gold (condensed)
  Foil                                            69           33
  Mat                                             40           33
  Powdered                  Goldent               46           33
Gold alloys
  Type I                    Ney-Oro A             45            7
  Type II                   Ney-Oro A-1           95            7
  Type III, soft            Ney-Oro B-2          110            7
  Type III, hard            Ney-Oro B-2          120            7
  Type IV, soft             Ney-Oro G-3          140            7
  Type IV, hard             Ney-Oro G-3          220            7
  40% Au-Ag-Cu, soft        Forticast            175            9
  40% Au-Ag-Cu, hard        Forticast            265            9
  10-15% Au-Ag-Pd, soft     Paliney No.4         150            7
  10-15% Au-Ag-Pd, hard     Paliney No.4         205            7
  Au-Pd                     Olympia              200            9
  Porcelain-fused-
    to-metal                Jelenko O            165            9
Palladium-based dental
    alloy                   Microstar            240            9
Silver-palladium alloys
  Crown-and-bridge, soft    Albacast             130            9
  Crown-and-bridge, hard    Albacast             140            9
  Porcelain-fused-
    to-metal                Jel-5                170            9
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Introduction to Biomaterials Properties | Biomaterials Properties Table Listing |
References (1-100) | References (101-200) | References (201-244) |

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Revised April, 1996
Biomaterials Properties Database, University of Michigan
Contact: Dr William J. O'Brien, Director (FAX: 313-647-5293).
Copyright © Quintessence Publishing, 1996.

http://www.lib.umich.edu/dentlib/Dental_tables/Brinhard.html

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