Steel Ball Hardness <% set recs = Server.CreateObject("ADODB.Recordset") recs.open "Select * from SBHardness", Conn %>

                       BALL SIZE 

                        MATERIAL  

BELOW 6.00 MM

ABOVE 6.00 MM

AISI-E-52100

81 TO 85 HRA

60 TO 67 HRC

AISI-1085

81 TO 85 HRA

60 TO 67 HRC

AISI-420

75 Min HRA

48 Min HRC

AISI-420C

78 Min HRA

55 Min HRC

AISI-440C

81 TO 85 HR

60 TO 67 HRC

Note : 
Hardness readings of balls taken on the spherical surface gets affected due to the curvature. Hence correction factor have been decided which when added to the readings taken on ball curvature, gives the equivalent effect of hardness value as if taken on a flat surface .