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C60

At the option of the manufacturer the elements aluminium, titanium, vanadium and niobium may be added singly or in combination for grain size control  purposes.
Elements not quoted in table shall not be added  to the steel without the agreement of  the purchaser, except for the purpose  of  finishing the heat.
 
Mechanical properties in the normalized and normalized and tempered conditions

Thickness of ruling section tR
Diameter in mm
tR ≤ 100mm
100< tR ≤250mm
250< tR ≤500mm
500< tR ≤1000mm
Re min  (N/mm2)
340
310
275
260
Rm min (N/mm2)
670
650
630
620
A % min.
l-longitudinal
11
11
11
10
tr -transverse
-
8
8
7
KV min * (J)
l-longitudinal
-
-
-
-
tr -transverse
-
-
-
-

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