From the following figure for steels, please filling blanks: (1) Given Brinell hardness HB=400, it can be converted into HRC= (2) A near-linear relationship exists between the hardness and the tensile strength. (a) The HB-Tensile strength relationship: [1] HB*0.5= Tensile strength (ksi) [ii] Tensile strength (ksi) =3*HB [iii] HB/3= tensile strength (ksi)
From the following figure for steels, please filling blanks: [20 pts]
300
110 100 HRB or HRC 90 80 70 60 so Rockwell hardness number, 40 30 20 10
Tensile strength
250
HRB
200 150 Approximate tensile strength, s.. 100 50
HRC
o
200 300 400 500 600 Brinell hardness number,HB
800
100
700
1) Given Brinell hardness HB= 400, it can be converted into HRC=
. [10 pts]
2) A near-linear relationship exists between the hardness and the tensile strength
) The HB-Tensile strength relationship
[10 pts]
[i] HB*0.5 = Tensile strength (ksi) [ii ] Tensile strength (ksi) = 3 *HB [iii] HB/3 = tensile strength (ksi)