CPM-3V Tool Steel Material Information

CPM-3V material is designed to provide maximum resistance to breakage and chipping in a highly wear-resistance material.  CPM-3V material offers impact toughness greater than A-2, D-2, Cru-Wear or CPM-M4 material, approaching the levels of S-7 and other shock resistance material, while providing excellent wear resistance, high hardness and thermal stability for coatings.   CPM-3V is intended to be used at HRC 58/60; CPM-3V can replace high alloy tool steels in wear applications where chronic tool breakage and chipping problems are encountered. 

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-3V material an ideal choice for a variety of applications such as stamping or forming tools, powder compaction tooling, industrial knives and slitters, fineblanking tools, cold heading tooling, plastic injection feeder screws and tips, punches and dies, blanking dies, shear blades, scrap choppers and rolls.

Mechanical Properties

1.       Impact Toughness

· The CPM microstructure gives CPM-3V material its high impact toughness which approaches that of the shock-resistance tool steels.

2.       Wear Resistance

· The vanadium content imparts CPM-3V material with excellent wear resistance; similar to that of M2 high speed steel.

 

Relative Mechanical Properties

                                · The combination of wear resistance and toughness offered by CPM-3V makes it an excellent alternative to shock-resistance grades such as S-7, A-9 in applications where they wear out too quickly.  Or, it can replace wear-resistance grades such as A-2, D-2, Cru-Wear or CPM-M4 in applications where they tend to fail by impact (chipping or breaking).  CPM-3V offers the highest impact toughness of any tool steel with this range of wear resistance.

 

Machinability and Grindability

                · Machinability in the annealed condition is similar to D-2 and Cru-Wear material, but Grindability will be slightly better.  Similar grinding equipment and practices are acceptable.  “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

Hardening 

 

Preheat:   Heat to 1500-1550 F (815-845 C) Equalize.

Austeniztize:   Heat to 1875-2050 F (1025-1120 C), hold time at temperature 20-45 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.

Temper:   Three times at 1000-1050 F (540-565 C), 2 hours minimum each time.

Size Change:  +0.03  / 0.05 %

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.

Recommended Heat Treatment

 

For the best combination of toughness and wear resistance, austenitize at 1950 F (1065 C), hold 30-45 minutes, and quench.

Temper 3 times at 1000 F (540 C)

Annealing

 

Anneal Cooling Method: Heat to 1650 F (900 C), hold for 2 hours, slow cool no faster that 25 F (15 C) per hour to 1100 F (595 C), then furnace cool or cool in still air to room temperature.  BHN around 241
AIM Hardness

 

HRC 58-60

   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: Blue & Red 
Flat Dimensions · Sizes available upon request
Round Dimensions

· ½” upto 3”

· Other sizes available upon request.

CPM-3V Typical Analysis

C

Mn

Cr

V

0.8%

1.3 %

7.5 %

2.75 %

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