DIN 2311 STEEL

DIN 2738 STEEL


STANDARDS :  40CRMNNIMO8-6-4

DIN 2311

P20 AISI P20 AFNOR Z210CW12-01
C 0.38

Mn 1.40

Cr 1.85

Mn 0.20


Steel Properties

DIN 2311 is the Pre Hardened Plastic mould steel hardness distributed evenly in large cross sections that have excellent weldability with least hardness elevation, good mirror polishability and less streak texture making finishing easier. Size Section availability upto 255mm thickness. Supply hardness is 240-280 BHN.

 

Physical Properties

Coefficient of thermal expansionat °C

20-100

20-150

20-200

20-250

20-300

20-350

20-400

20-450

20-500

10-6 m/(m*K)

12.7

12.8

13.1

13.3

13.6

13.7

13.8

14.0

14.3

 

Thermal Conductivity at °C

23

150

300

350

400

500

W/(m*K)

32.0

32.8

31.4

30.2

29.6

27.5


Application

Plastic mould steel equivalent to DIN 2311 use for die holders, zinc die, casting dies, backers, bolsters, injection moulds, mould frames for plastic moulds, Shoe Blocks, pressure casting moulds, recipient sleeves Etc.

 

Heat Treatment

Soft annealing °C

Cooling

Hardness HB

710 – 740

Furnace

max. 235

 

Hardening °C

Quenching

Hardness after quenching HRC

850 – 880

Oil or saltbath, 180 – 220 °C

52

 

Tempering °C after Quenching

100

200

300

400

500

600

700

HRC 52 50.5 48.5 46 42 36.5 28