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  # Welcome to Shenyang Tianxing Testing lnstruments Co.,Ltd
  
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  # Conversion Between Various Hardness Value
  
  Although hardness is applied widely, it is not the independent basic capacity of material. What kind of resistanting power that specific hardness represents relies on the test method it applies, that is hardness type. For example, the plunging hardness represents material's ability of resistanting transformation, and characterization method of hardness represents material's ability of resistanting fracture etc. Visible hardness has no exact physical significance. Therefore, there is no conversion formula between various kinds of hardness values.
  
  Under the circumstance, a certain hardness value should be converted to a needed hardness value. After long time practicing and accumulating datas, people get some hardness conversion formulas by mathematical methods. Certainly, these formulas are all experimental, and conversion relations between experimental data of average and approximate value. The result has certain reference value.
  
  Approximate conversion formulas of several hardness values are as follows:
  
  1. Relations between HB and HV
  
  When HB≤400， HB≈HV
  
  When HB＞400， HB＜HV
  
  2. Relations between HB and HR
  
  HB=4030/130-HRF
  
  HB=7300/130-HRB(40＜HRB＜100)
  
  HB=333000/(100-HRA)2(55＜HRA＜70)
  
  HB=1520000-4500HRC/(100-HRC)2(20＜HRC＜40)
  
  HB=25000-10(57-HRC)2/100-HRC(50＜HRC＜60)
  
  3. Relations between HV and HRC
  
  HV=2×106/(112-HRC)2
  
  4. Relations between HB and HS
  
  HB=αHS
  
  In the formula, α is different according to different materials(see Tab.1), HS is the Shore hardness  value tested by a diamond indenter. If a steel ball indenter is applied, the result should multiply by 0.56 to convert to Shore hardness value with diamond indenter.
  
  Tab.1 Coefficient α between HB and HS of Some Kinds of Steel
explanation: The document provides information on the conversion between various hardness values, including Brinell hardness (HB), Vickers hardness (HV), Rockwell hardness (HR), and Shore hardness (HS). It explains that hardness values do not have exact physical significance and that conversion formulas are experimental and approximate. The document lists several approximate conversion formulas between these hardness values.
  
  The document does not contain a specific question or a question-and-answer format. It is primarily informational.
distilabel_metadata.content: Evaluate the user given text extract and determine if it contains a math question and optionally and answer to this question.
  
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  1. Briefly describe the document and mention if it contains a question or a question and answer.
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distilabel_metadata.role: system
distilabel_metadata.content: Search
  
  What are you looking for?
  
  English
  
  # Welcome to Shenyang Tianxing Testing lnstruments Co.,Ltd
  
  +86-15241797028
  export@txinstruments.com
  
  # Conversion Between Various Hardness Value
  
  Although hardness is applied widely, it is not the independent basic capacity of material. What kind of resistanting power that specific hardness represents relies on the test method it applies, that is hardness type. For example, the plunging hardness represents material's ability of resistanting transformation, and characterization method of hardness represents material's ability of resistanting fracture etc. Visible hardness has no exact physical significance. Therefore, there is no conversion formula between various kinds of hardness values.
  
  Under the circumstance, a certain hardness value should be converted to a needed hardness value. After long time practicing and accumulating datas, people get some hardness conversion formulas by mathematical methods. Certainly, these formulas are all experimental, and conversion relations between experimental data of average and approximate value. The result has certain reference value.
  
  Approximate conversion formulas of several hardness values are as follows:
  
  1. Relations between HB and HV
  
  When HB≤400， HB≈HV
  
  When HB＞400， HB＜HV
  
  2. Relations between HB and HR
  
  HB=4030/130-HRF
  
  HB=7300/130-HRB(40＜HRB＜100)
  
  HB=333000/(100-HRA)2(55＜HRA＜70)
  
  HB=1520000-4500HRC/(100-HRC)2(20＜HRC＜40)
  
  HB=25000-10(57-HRC)2/100-HRC(50＜HRC＜60)
  
  3. Relations between HV and HRC
  
  HV=2×106/(112-HRC)2
  
  4. Relations between HB and HS
  
  HB=αHS
  
  In the formula, α is different according to different materials(see Tab.1), HS is the Shore hardness  value tested by a diamond indenter. If a steel ball indenter is applied, the result should multiply by 0.56 to convert to Shore hardness value with diamond indenter.
  
  Tab.1 Coefficient α between HB and HS of Some Kinds of Steel
distilabel_metadata.role: user
distilabel_metadata.raw_output_q_a_detector_0: The document provides information on the conversion between various hardness values, including Brinell hardness (HB), Vickers hardness (HV), Rockwell hardness (HR), and Shore hardness (HS). It explains that hardness values do not have exact physical significance and that conversion formulas are experimental and approximate. The document lists several approximate conversion formulas between these hardness values.
  
  The document does not contain a specific question or a question-and-answer format. It is primarily informational.
  
  Label: no-question