Steel 27MnCrB5-2

27MnCrB5-2

EN 10083-3:2002, Number: 1.7182

Comparasion of steel grades

JUS

-

DIN

27MnCrB5-2

BS

-

GOST

-

AISI

-

UNI

-

NF

-

Hemical elements

C

Si

Mn

P

S

Cr

B

%, by mass

0,24 - 0,30

Ł 0,40

1,10-1,40

max 0.025

max 0,035

0,30-0,60

0,0008-0,0050

Permissible deviation

± 0.02

± 0,03

± 0,05

+ 0.005

+ 0.005

± 0,05

± 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)

800

750

700*

-

-

Rm (MPa)

1000-1250

900-1150

800-1000*

-

-

A min. (%)

14

14

15*

-

-

Z min. (%)

55

55

55*

-

-

KV min. (J)

50

60

65*

-

-

Distance in mm from quenched end Hardness in HRC (mm)

mm

1,5

3

5

7

9

11

13

15

20

25

30

35

40

45

50

+H

max.

55

55

55

54

54

53

52

51

47

44

40

37

-

-

-

min.

47

46

45

44

43

41

39

36

30

24

20

-

-

-

-

Hardening temperature in the end quench test

Quenching temperature

Quenching in

Tempering temperature

850⁰±5⁰C

840-880 ⁰C

Water or oil

400-600 ⁰C

+S
HB max.

+A

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

38

52

43