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124
plain carbon and alloy steels)
(;Ul'l~IHllJiJ'lIU1~Lftw-ilflu6mllnh::;lJlru
25
mm.)
.
Tensile
Yie ld
Elollgat.
Reduction
Machinability(
AISI
Hardness,
Cond ition
Strength,
Strength,
In
2
in.,
In Area,
Based on I I
12
Type
BHN
ksi
ksi
%
%
~
100)
10 10
HR
64
42
28
67
107
45
CD
78
68
16
63
129
55
CDA
64
48
28
65
131
55
1020
HR
65
43
36
59
143
50
CD
78
66
20
55
156
65
A
57
52
37
66
III
90
N
64
50
36
68
131
75
1030
HR& turned
72
44
31
63
140
CD
84
76
16
57
177
65
A
67
50
31
58
126
N
76
51
32
61
149
1040
HR
91
58
27
50
201
63
CD
100
88
17
42
207
65
A
75
51
30
57
149
-
N
85
50
28
55
170
60
1045
HR
98
59
24
45
212
56
CD
103
90
14
40
217
60
A
90
55
27
54
174
60
N
99
61
25
49
207
1050
HR
105
67
15
-
-
CD
114
104
9
-
-
54
A
92
43
24
40
187
-
N
109
62
20
I
39
217
-