WP7V

When tough isn`t tough enough

Properties of cold work steels

42 6646 50 54 58 62hardness in HRc

wea

r re

sist

ance

toug

hnes

s

tough hardcarbide

rich

wear resistance

toughness

Cold work steels for forming processes

C

0,45

0,60

0,50

0,90

1,00

1,00

1,20

1,55

2,10

Si

0,45

0,70

0,30

0,30

0,30

1,10

0,30

0,25

0,25

M n

0,30

0,30

0,30

2,00

0,60

0,30

0,30

0,30

0,30

Cr

1,40

1,00

7,80

0,40

5,00

8,00

12,0

12,0

12,0

M o

0,20

-

1,50

-

1,00

2,50

1,40

0,80

-

V

-

0,20

1,50

0,15

0,30

0,30

1,70

1,00

-

W

-

2,00

-

-

-

2,50

-

0,80

Ni

4,00

-

-

-

-

-

-

-

standard chem ical com positionm aterial tem pering behaviour

+ add.

1.2767 1.2550 W P7V

1.2842 1.2363 CPOH

CPR 1.2379 1.2436

WP7V Case Studies

Before:Problem: Total FailureHardness: 57 -58 HRc

Application: Shearing Tool, AISI S5 for CK 45, 42CrMo4

DIA 20 – 40 mm

After:Problem: NoneHardness: 58 HRc

WP7V Case Studies

Before:Problem: Failure after

2000 – 3000 shotsHardness: 58 HRc

Application: Stamping tool K190 PM Plate ST 37-2,

10 mm thick

After:Problem: None – regrind after

80.000 – 100.000 shotsHardness: 58 HRc

WP7V Case Studies

Before:Problem: Total FailureHardness: 59 -61 HRc

Application: Punching Tool, WNR. 1.2379 for AP 0,14 (St 14)

DIA 20 – 40 mm

After:Problem: NoneHardness: 58 HRc

WP7V Case Studies

Before:Problem: High cost of powder steels.Hardness: 57 -58 HRc

Application: Punching break pads,

CPM® 3V, Carbon steels

ca. 400 N/mm2 , 5 mm thick

After:Problem: None – upto 40.000

shots.Hardness: 58-59 HRc

WP7V Case Studies

Application: Punching brass, working temp., approx. 500ºC

W321 (1.2885)Without Cooling6-7 pieces.

The problem: Total failure

WP7VWithout CoolingCa. 300 stk

WP7VWith Cooling (Oil/Air/Graphite)ca. 75000 Stk.50-52 HRC