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C60R

C60R EN 10083-2:2002, Number: 1.1223  Comparison of steel grades
JUS Č.1780
DIN Cm60
BS -
GOST -
AISI -
UNI  
NF -


Chemical analysis -% by mass

Chemical elements C Si 
max.
Mn P max. S Cr
max.
Mo
max.
Ni
max.
Cr+Mo+Ni
max.
%, by mass 0,57-0,65 0,40 0,60-0,90 0.025 0,020-0,040 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 -


Jominy’s hardenability band

Distance in mm from quenched end Hardness in HRC
Symbol mm 1 2 3 4 5 6 7 8 9 10 11 13 15 20 25 30 
+H max. 67 66 65 63 62 59 54 47 39 37 36 35 34 33 31 30 
min. 60 57 50 39 35 33 32 31 30 29 28 27 26 25 23 21 

  Tentative values for the ’’C’’ scale Rockwell hardness for special steel grades with restricted hardenability scatter bands (+HH and +Hl grades)

Symbol Distance in mm ftom the quenched end HRC hardness
1 4 5
+HH5 +HH15 +HL5 +HL15 - - 44 to 62
62 to 67 - 44 to 62
- - 35 to 53
60 to 65 - 35 to 53

  Maximum hardness for products to be supplied in the ’’treated to improve shearability (+S)’’ or

’’soft annealed (+A)’’ condition  +S HB max. +A HB max.
255 241

  Mechanical properties in the quenched and tempered condition (+QT)

  Mechanical properties for the ruling sections (see prEN10083-1:2002, Annex A) with a diameter (d) or for flat products trickness (t) of
d  ≤ 16mm t ≤ 8mm 16mm < d  ≤ 40mm 8mm < t  ≤  20mm 40mm < d  ≤ 100mm 20mm < t  ≤  60mm
Re min (MPa) 580 520 450
Rm (MPa) 850-1000 800-960 750-900
A  min. (%) 11 13 14
Z  min. (%) 25 30 35
KV min. (J) -                  -                    -

  Mechanical properties in the normalized condition – (+N)

  Mechanical properties for  products with a diameter (d) or, for flat products trickness (t) of
d  ≤ 16mm t ≤ 16mm 16mm < d  ≤ 100mm 16mm < t  ≤  100mm 100mm < d  ≤ 250mm 100mm < t  ≤  250mm
Re min. (MPa) 380 340 310
Rm min. (MPa) 710 670 650
A  min. (%)                   10                     11                     18

  Heat treatment conditions

Quenching 0C Quenching agent Tempering temperature 0C  Hardening temperature in the end quench test 0C Normalizing 0C
800-840 Oil or water  (ulje ili voda) 550-660 8300±5 820 to 880

Source:

Tags: C60R

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