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C55R

C55R EN 10083-2:2002, Number: 1.1209  Comparison of steel grades
JUS Č.1680
DIN (C55R, Cm55)
BS (070M55)
GOST 55
AISI (1055)
UNI -
NF (XC55H1)

 

Under EN10083-2:2002 standard C55R steel plate/sheet properties and heat treatment forgings, Including C55R steel application and specifications, We have all specifications,Including C55R  bars, rod, Plate, bar, square steel, rectangular steel,forgings, BEBON STEEL can own production and sales.

C55R STEEL PLATE Chemical analysis -% by mass

Chemical elements C Si 
max.
Mn P max. S1
max.
Cr
max.
Mo
max.
Ni
max.
Cr+Mo+Ni
max.
%, by mass 0,52-0,60 0,40 0,60-0,90 0.025 0,035 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. 65 64 63 62 60 57 52 45 37 36 35 34 33 32 30 29
min. 58 55 47 37 33 32 31 30 29 28 27 26 25 24 22 20

  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 from the quenched end HRC hardness
1 4 5
+HH5 +HH15 +HL5 +HL15 - - 42 to 60
60 to 65 - 42 to 60
- - 33 to 51
58 to 63 - 33 to 51

  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.)
255 229

  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) 550 490 420
Rm (MPa) 800-950 750-900 700-850
A  min. (%) 12 14 15
Z  min. (%) 30 35 40
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) 370 330 300
Rm min. (MPa) 680 640 620
A  min. (%)                 11                  12                   12

  Hardness of surface hardened zones for special steels intended for flame and induction hardening

HRC min. 58

  Heat treatment conditions

Quenching 0C Quenching agent Tempering temperature 0C  Hardening temperature in the end quench test 0C Normalizing 0C
805-840 Oil or water 550-660 8300±5 825 to 885

Source:

Tags: C55R

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