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C40 steel

C40 steel plate, EN 10083 C40 steel plate, under EN 10083 standard, we can regard C40 steel plate as high carbon steel.

C40 steel plate is one mainly of high carbon steel,EN 10083C40 steel plate is meduim Carbon Steels are similar to low carbon steel except that the carbon ranges from 0.30 to 0.60% & the manganese from 0.50 to 1.65%. Increasing the carbon content is approximately 0.5% with an accompanying increase in manganese allows medium carbon steels to be used in the quenched & tempered conditions. This steels are of particular importance because of unique combination of strength & toughness after heat treat treatment.
 

C40
EN 10083-2
Number: 1.0511
Comparison of steel grades
JUS Č.14341
DIN C40
BS 080M40, EN8
GOST 40
AISI 1040
UNI C40,
NF (AF60C40), (1C40)

Chemical analysis -% by mass

Chemical elements C Si 
max.
Mn P
max.
S
max.
Cr
max.
Mo
max.
Ni
max.
Cr+Mo+Ni
max.
 
%, by mass 0,37-0,44 0,40 0,50-0,80 0,045 0,045 0,40 0,10 0,40 0,63 -
Permissible deviation ±  0,02 + 0,03 ± 0,04 + 0,005 + 0,005 + 0,05 + 0,03 + 0,05   -

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 conditions
 

Thickness of ruling section tR

Diameter in mm

tR ≤ 100mm 100< tR ≤250mm 250< tR ≤500mm 500< tR ≤1000mm
Re min  (N/mm2) 290 260 - -
Rm min (N/mm2) 550 530 - -
A % min.

l-longitudinal

17 17 - -

tr -transverse

- - - -
KV min * (J) l-longitudinal - - - -
tr -transverse - - - -

1N/mm2=1MPa
Heat treatment conditions
 

Quenching
Temperature, 0C
Cooling medium Tempering
Temperature, 0C
Normalizing  
temperature, 0C
830 to 870 Water or oil 550 to 660 850 to 890