| C45R EN 10083-2:2002, Number: 1.1201 |
Comparison of steel grades |
|
|
JUS |
(Č.1580) |
|
|
DIN |
(Cm45) |
|
|
BS |
(080M46) |
|
|
GOST |
- |
|
|
AISI |
(1049) |
|
|
UNI |
- |
|
|
NF |
(XC48H1u) |
|
C45R 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 |
0,42-0,50 |
0,40 |
0,50-0,80 |
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 (mm) | ||||||||||||||||||
|
Symbol |
mm |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
13 |
15 |
20 |
25 |
30 |
|
|
+H |
max. |
62 |
61 |
61 |
60 |
57 |
51 |
44 |
37 |
34 |
33 |
32 |
31 |
30 |
29 |
28 |
27 |
|
|
min. |
55 |
51 |
37 |
30 |
28 |
27 |
26 |
25 |
24 |
23 |
22 |
21 |
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 |
|
|
+HH4 +HH14 +HL4 +HL14 |
- |
41 to 60 |
- |
|
57 to 62 |
41 to 60 |
- |
|
|
- |
30 to 49 |
- |
|
|
55 to 60 |
30 to 49 |
- |
|
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 |
207 |
C45R 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) |
490 |
430 |
370 |
||
|
Rm (MPa) |
700-850 |
650-800 |
630-780 |
||
|
A min. (%) |
14 |
16 |
17 |
||
|
Z min. (%) |
35 |
40 |
45 |
||
|
KV min. (J) |
25 |
25 |
25 |
||
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) |
340 |
305 |
275 |
||
|
Rm min. (MPa) |
620 |
580 |
560 |
||
|
A min. (%) |
14 |
16 |
16 |
||
Hardness of surface hardened zones for special steels intended for flame and induction hardening
HRC min. 55
C45R Heat treatment conditions
| Quenching 0C |
Quenching agent |
Tempering temperature 0C |
Hardening temperature in the end quench test 0C |
Normalizing 0C |
|
820-860 |
Water or oil |
550-660 |
8500±5 |
840 to 900 |
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