Brinell Hrdness Number 1

[auba]

Hi friend,

can anybody explain me... if a metrial having a brinell harnbess number of 197 and another material having brinell hardness number of 187...

how to determine which material is strong... i mean which material will be going to have more ultimate tensile strength

Thanks

 

[EdStainless]

Are the samples the same type of material, manufactured the same way? If so then higher hardness will equate to higher strength.
If they are not the same type of alloy or they were not made the same way then it only means that they have different BHN values.

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[lgearhart]

At those numbers (197, 187) you also have to worry about whether they were taken on the same scale. Brinell hardness can use either 500 Kg or 3000 Kg as a standard load, and the values will vary. To illustrate, a BHN of 189 using 500 Kg translates to about 228 BHN using 3000 Kg: hence 187 BHN(500 Kg) is harder than 197 BHN(3000Kg).

 

[TomEun]

Please find API RP579, Table F-1.

 

[bmoorthy]

Dear Ed Steel

We perform Portable Brinel Hardness testing (Using Tele Brinel equipment), this is using Hammer and indentation method.

This being a field test to checking the Gross quality, to check whether the material after fabrication complies to specification that calls for 197 Brinel (3000 Kg), What load should we consider for Telebrinel?