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C50R steel plate

C50R steel

C50R EN 10083-2:2002, Number: 1.1241

Comparison of steel grades

JUS

(Č.16303)

DIN

(Cm50)

BS

(080M50)

GOST

-

AISI

-

UNI

-

NF

-

C50R Chemical analysis -% by mass

Hemical elements

C

Si max.

Mn

P max.

S

Cr max.

Mo max.

Ni max.

Cr+Mo+Ni max.

%, by mass

0,47-0,55

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 (mm)

Symbol

mm

1

2

3

4

5

6

7

8

9

10

11

13

15

20

25

30

+H

max.

63

62

61

60

58

55

50

43

36

35

34

33

32

31

29

28

min.

56

53

44

34

31

30

30

29

28

27

26

25

24

23

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

-

-

40 to 58

58 to 63

-

40 to 58

-

-

31 to 49

56 to 61

 

31 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

217

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)

520

460

400

Rm (MPa)

750-900

700-850

650-800

A min. (%)

13

15

16

Z min. (%)

30

35

40

KV min. (J)

-

-

-

C50R 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)

355

320

290

Rm min. (MPa)

650

610

590

A min. (%)

12

14

14

C50R Heat treatment conditions

Quenching 0C

Quenching agent

Tempering temperature 0C

Hardening temperature in the end quench test 0C

Normalizing 0C

810-850

Oil or water

550-660

8500±5

830 to 890


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