Its typically used for dynamo and motorshafts, heat-treated bolts, crankshafts, connection rods, driving rings and flanges, railway couplings, axles, brackets, housing, miscellaneous gun carriage and small arms parts not subjected to high stresses or severe wear.
Forgeability
Good
Heat Treatment Ability
Good
Machineability
Good
Weldability
Average
Chemical Composition
ELEMENT
MIN.
MAX.
Carbon
0.36
0.44
Silicon
0.10
0.40
Manganese
0.60
1.00
Phosphorous
–
0.05
Sulphur
–
0.05
Mechanical Properties
(Bright Cold Rolled or Bright Cold Drawn Only)
Condition
N
Q
R
Limited Ruling Section, mm
254
64
19
Tensile Strength, MPa min.
510/540
620/770
690/850
Yield Stress; MPa min.
245
385
465
Elongation, % min.
17
16
16
Izod Impact Value; Joule
20
33.4
33.4
Brinnel Hardness Number
152/207
179/229
201/255
Foreign Equivalent Specifications
Standard German Mat. No.
Din
SAE
AISI
JIS
1.0503
C45
1043
1043
–
Stock Size Range
(Bright Dawn and Turned Round Bar)
6 mm
0,222 kg/m
25 mm
3.853 kg/m
60 mm
22.195 kg/m
125 mm
96.337 kg/m
7 mm
0.302 kg/m
1″
3.978 kg/m
2 ½“
24.861 kg/m
130 mm
104.195 kg/m
8 mm
0.395 kg/m
26 mm
4.168 kg/m
65 mm
26.049 kg/m
5 1/4“
109.634 kg/m
9 mm
0.499 kg/m
28 mm
4.824 kg/m
2 5/8“
27.408 kg/m
135 mm
112.364 kg/m
3/8“
0.599 kg/m
1 1/8“
5.034 kg/m
2 3/4“
30.018 kg/m
5 ½“
120.323 kg/m
10 mm
0.617 kg/m
30 mm
5.549 kg/m
70 mm
30.210 kg/m
140 mm
120.841 kg/m
11 mm
0.746 kg/m
1 1/4“
6.215 kg/m
2 7/8“
32.878 kg/m
145 mm
129.627 kg/m
7/16“
0.761 kg/m
32 mm
6.313 kg/m
75 mm
34.680 kg/m
5 3/4“
131.511 kg/m
12 mm
0.888 kg/m
1 3/8“
7.520 kg/m
3″
35.799 kg/m
150 mm
138.721 kg/m
½”
0.994 kg/m
35 mm
7.553 kg/m
80 mm
39.458 kg/m
6″
143.195 kg/m
14 mm
1.175 kg/m
36 mm
7.990 kg/m
3 1/4“
42.013 kg/m
155 mm
148.123 kg/m
9/16“
1.259 kg/m
38 mm
8.903 kg/m
85 mm
44.545 kg/m
160 mm
157.833 kg/m
15 mm
1.387 kg/m
1½”
8.950 kg/m
3½”
48.726 kg/m
5/8“
1.554 kg/m
40 mm
9.865 kg/m
90 mm
49.939 kg/m
16 mm
1.578 kg/m
1 5/8“
10.504 kg/m
95 mm
55.642 kg/m
17 mm
1.782 kg/m
42 mm
10.876 kg/m
3 3/4“
55.936 kg/m
18 mm
1.998 kg/m
1 3/4“
12.181 kg/m
100 mm
61.654 kg/m
19 mm
2.226 kg/m
45 mm
12.485 kg/m
4″
63.642 kg/m
20 mm
2.466 kg/m
1 7/8“
13.984 kg/m
105 mm
67.973 kg/m
13/16“
2.626 kg/m
48 mm
14.205 kg/m
4 1/4“
71.846 kg/m
21 mm
2.719 kg/m
50 mm
15.413 kg/m
110 mm
74.601 kg/m
22 mm
2.984 kg/m
2″
15.911 kg/m
4 ½“
80.547 kg/m
7/8“
3.045 kg/m
2 1/8“
17.962 kg/m
115 mm
81.537 kg/m
15/16“
3.496 kg/m
55 mm
18.650 kg/m
120 mm
88.781 kg/m
24 mm
3.551 kg/m
2 1/4“
20.137 kg/m
4 3/4“
89.745 kg/m
Larger sizes in black bar and forgings are also available but
remember to allow for surface removal of + 6% to ensure cleanup.
