MECHANICAL PROPERTIES FOR BOLTS AND SCREWS

Steel Property Class 3.6 Through 12.9
Tensile Strength min. (psi)
Yield Strength min. (psi)
Vickers Hardness (HV)
Brinell Hardness (HB)
Rockwell Hardness (HRB)
Rockwell Hardness (HRC)
Similar To
3.6
47850
28710
min.
95
90
52
NA
max.
250
238
99.5
NA
4.6
58000
34800
min.
120
114
67
NA
max.
250
238
99.5
NA
4.8
60900
49300
min.
130
124
71
NA
max.
250
238
99.5
NA
5.6
72500
58000
min.
155
147
79
NA
max.
250
238
99.5
NA
5.8
75400
60900
min.
160
152
82
NA
Grade 2
max.
250
238
99.5
NA
6.8
87000
69600
min.
190
181
89
NA
max.
250
238
99.5
NA
8.8 16mm
116000
92800
min.
250
238
NA
22
Grade 5
max.
320
304
NA
32
8.8 >16mm
120350
95700
min.
255
242
NA
23
max.
335
318
NA
34
9.8
130500
104400
min.
290
276
NA
28
Above Grade 5
max.
360
342
NA
37
10.9
150800
136300
min.
320
304
NA
32
Grade 8
max.
380
361
NA
39
12.9
176900
159500
min.
385
366
NA
39
ASTM A574
max.
435
414
NA
44
Tensile Strength (psi)
min.
max.
90
min.
280
268
NA
27
Above Grade 5
130500
159500
max.
340
323
NA
34
100
145000
174000
min.
320
304
NA
32
Grade 8
max.
370
352
NA
38
Stainless Steel Grades A1  A2 -A4
Tensile Strength min. (psi)
Yield Strength min. (psi)
Hardness
Similar To
Property Class 50
72500
30450
Vickers, Brinell or Rockwell Hardness Are Not Measureable Factors For Stainless Steel
A1 Stnl Steel ~ Free Cutting Stnl Steel A2 Stnl Steel ~ 18-8 Stnl Steel A4 Stnl Steel ~ 316 Stnl Steel
Property Class 70
101500
65250
Property Class 80
116000
87000
Brass
Tensile Strength min. (psi)
Yield Strength min. (psi)
Hardness
Ms 63
53000
Vickers, Brinell or Rockwell Hardness Are Not Measureable Factors For Brass
————————————-
Ms 58
55000