CPM-9V Tool Steel Material Information

CPM-9V material is a modification of CPM-10V with lower carbon and vanadium to improve toughness and heat check resistance.  These enhancement properties permit CPM-9V to perform well in problem applications where high carbon, high chromium tool steels, such as CPM-10V or the high speed steels, lack sufficient toughness or heat check resistance, or where lower alloy tool steels and hot work tool steels lacks sufficient wear resistance.

 The CPM process produces very homogeneous, high quality steel characterized by superior dimensional stability, grindability, and toughness compared to steels produced by conventional processes.

 The combination of properties makes CPM-9V material an ideal choice for a variety of applications such as forming rolls, rolling mill rolls, header tooling, extrusion tooling, pelletizer blades, punches, dies, slitter knives, shear blades, granulator blades and plasticizing components: non-return values and screws.

 Machinability and Grindability

  •  In the annealed condition, the machinability of CPM-9V is comparable to that of M-2.  Similar grinding equipment and practices used for high-speed steels are recommended.  “SG” type of alumina wheels or CBN wheels have generally given the best performance with CPM grades.

Flats
  •  Sizes available upon request
Rounds
  • Upto 1” +/- .010 upto .015

  •   1” to 3” ” +/- .020 upto .030

  •  Other sizes available upon request

Critical Temperature 1590 F (865 C)
Forging

2000-2100 F (1095-1150 C).

Do not forge below 1700 F (930 C)

Slow cool
Annealing

Heat to 1650 F (900 C), hold for 2 hours, slow cool no faster 30 F (15 C) per hour to 1000 F (540 C), then furnace cool or cool in still air to room temperature.

BHN around 223-255
Stress Relieving

 

Annealed Parts:   Heat to 1100-1300 F (595-705 C), hold 2 hours, then furnace cool or cool in still air.

Hardened Parts:   Heat 25-50 F (15-30 C) below original tempering temperature, hold 2 hours, then furnace cool or cool in still air.

Straightening:   Best done warm 400-800 F (200-430 C)

Hardening

 

Preheat:   Heat to 1550-1600 F (845-870 C) Equalize.

Second pre-heat stage at 1850-1900 F (1010-1040 C) suggested for vacuum or atmosphere hardening.

Austeniztize:   Heat to 1875-2150 F (1025-1175 C), hold time at temperature 30-45 minutes.

Quench:   Air or positive pressure quench (2 bar minimum) to below 125 F (50 C), or salt or interrupted oil quench to about 1000 F (540 C), then air cool to below 125 F (50 C).  Salt bath treatment, if practical, will ensure the maximum attainable toughness for a given hardening treatment.  Vacuum or atmosphere quench rate through 1850-1300 F (1010-705 C) range is critical to achieve optimum heat treat response.

Temper:   Double temper at 1000 F (540 C) minimum, 2 hours minimum each time.

Size Change:+0.01%

Recommended Heat Treatment

 

For the best combination of toughness and wear resistance, austenitize CPM-10V at 2050 F (1120 C), hold 30-45 minutes, and quench.

Temper 3 times at 1025 F (550 C)
AIM Hardness

 

HRC 60

Higher austenitizing temperatures can be used to obtain higher hardness, at a slight decrease in impact resistance.  The lower austenitizing temperatures provide the best impact toughness.
Material In Stock Color Code: black & gold
Flat Dimensions
  • Sizes available upon request
Round Dimensions
  • Sizes available upon request
CPM-9V Typical Analysis

 

 

 

 

C

Mn

Cr

V

1.78%

1.3%

5.25%

9.00%

 · Slight variations from typical analysis shown may occur in order to maintain the desired graphitizing potential.