Steel 20MnB5

20MnB5

EN 10083-3:2002, Number: 1.5530

Comparasion of steel grades

JUS

-

DIN

21MnB5

BS

-

GOST

-

AISI

-

UNI

-

NF

-

Chemical elements

C

Si

Mn

P

S

-

B

%, by masss

0,17 - 0,23

Ł 0,40

1,10-1,40

max 0.025

max 0,035

-

0,0008-0,0050

Permissible deviation

± 0.02

± 0,03

± 0,05

+ 0.005

+  0.005

-

± 0.03

d  ≤ 16mm oder t ≤ 8mm

16mm < d  ≤ 40mm

8mm < t  ≤  20mm

40mm < d  ≤ 100mm

20mm < t  ≤  60mm

100mm <  d  ≤ 160mm

60mm < t  ≤  100mm

160mm < d  ≤  250mm

100mm < t  ≤  160mm

Re _min (MPa)

700

600

-

-

-

Rm (MPa)

900-1050

750-900

-

-

-

A  min. (%)

14

15

-

-

-

Z  min. (%)

55

55

-

-

-

KV min. (J)

60

60

-

-

-

Distance in mm from quenched end Hardness in HRC

mm

1,5

3

5

7

9

11

13

15

20

25

30

35

40

45

50

+H

max.

50

49

49

49

47

45

43

41

33

27

-

-

-

-

-

min.

42

41

40

37

30

22

-

-

-

-

-

-

-

-

-

Hardening temperature in the end quench test

Quenching temperature

Quenching in

Tempering temperature

900⁰±5⁰C

880-920 ⁰C

  Voda (water)

400-600 ⁰C

Obrađeno za sposobnost sječenja u hladnom stanju

(+S cold chesring)

HB max.

Mekožareno

(+A soft annealing)

HB max.

-

Shearable in the untreated condition

-

Condition +A is not applicable for boron steels

Hardening temperature

⁰C

Core hardness *

HRC

Approximate maximum diameter

mm

Water

Oil

900

34

32

25