CPM® 10V
(AISI A11)
CPM 10V is a unique tool steel made by the Crucible Particle Metallurgy process. It is designed with a tough, air hardening base analysis with added high carbon and vanadium for exceptionally good wear resistance, toughness and strength for cold and warm work tooling applications.
    The exceptional wear resistance and good toughness of CPM 10V make it an excellent candidate to replace carbide and other highly wear resistant materials in cold work tooling applications, particularly where tool toughness is a problem or where cost effectiveness can be demonstrated.
Typical Chemistry
Carbon 2.45%
Manganese 0.50%
Silicon 0.90%
Chromium 5.25%
Vanadium 9.75%
Molybdenum 1.30%
Sulfur 0.07%
Typical Applications
Punches & Dies for Blanking, Piercing,
    Forming and Cold Extrusion
Knives for Slitting, Shearing, Trimming, etc.
    Granulator/Pelletizer Blades
Nozzles, Screw Tips, Barrel Liners, etc. for
    Plastic Injection Molding Equipment
Powder Compaction Tooling
Woodworking Tools Wear Parts
Annealed Hardness: BHN 255/277.

Machinability in the annealed condition is similar to D2 or M2. SG type alumina wheels or CBN wheels are recommended for the best grinding performance with the CPM steels.

Thermal Treatments

Critical Temperature: 1540F(838C).

Forging: 2000-2100F(1095-1150C) Do not forge below 1700F(930C). Slow cool after forging.

Annealing: 1600F(870C), hold 2 hours, slow cool 30F(15C)/ hr max. to 1000F(540C), then air or furnace cool. Hardness BHN 255/277. Stress Relieving (After machining): 1100-1300F(595-740C), hold 2 hrs. and air or furnace cool.

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

Hardening: (Salt, vacuum or atmosphere)

Preheat: 1500-1550F(820-845C), equalize. Second preheat stage at 1850-1900F(1010-1040C) suggested for vacuum or atmosphere hardening.

High Heat: 1850-2150F(1010-1175C). Standard recommendation to achieve Rc 60-62 after tempering is to use 2050F(1120C).

Quench: Salt, oil or atmosphere quench to 1000-1100F(540-595C), equalize, then air cool to below 125F(50C) or hand warm. Vacuum or atmosphere quench rate through 1850-1300F(1010-705C) range is critical to achieve optimum heat treat results.

Temper: 1000F(540C) minimum recommended. Double tempering is required.
Hardening Data
Tempering
HEAT TREAT RESPONSE ±1 HRC (NOTE A)
Temperature
1850F
1900F
1950F
2050F
2100F
2150F
°C
°F
(1025C)
(1040C)
(1065C)
(1120C)
(1150C)
(1175C)
As Quenced
61
63
65
65
64.5
63.5
540
1000
56
57
60.5
62
63
64
OPTIMUM FOR MAXIMUM TOUGHNESS AND EFFECTIVE STRESS-RELIEVING.
550
1025
54
56
58.5
60
62
63
565
1050
52
54
56.5
58
60
61
595
1100
49
51
52
54
55
56
620
1150
44
45
46
48
50
51
650
1200
40
41
43
46
47
48
NOTE A:
RESULTS MAY VARY WITH HARDENING METHOD AND SECTION SIZE. SALT OR OIL QUENCHING WILL GIVE MAXIMUM RESPONSE. VACUUM OR ATMOSPHERE COOLING MAY RESULT IN UP TO 1-2 HRC POINTS LOWER.
MINIMUM TIME AT
AUST TEMP (MINS)
60
45
30
20
15
10
MINIMUM NUMBER
OF TEMPERS (2 HRS)
2
2
2
2
3
3
Size Change During Hardening
Hardening
Temp.
Tempering
Temp.
HRC
Longitudinal
Size Change
%
°F
°C
°F
°C
1950
1065
1000
540
60
+.04
2150
1175
1000
540
64
+.04
Surface Treatments
CPM 10V can be nitrided, steam tempered or titanium-nitride coated if desired. If the CVD TiN treatment is used, care is required in vacuum hardening.

Physical Properties
Modulus of Elasticity ...................................................................32 psi x 106 (221 GPa)
Specific gravity ............................................................................................................7.41
Density .......................................................................................0.268 lb/in3 (7418 kg/m3)
Coefficient of Thermal Expansion
Temperature
Range
Coefficient of Thermal
Expansion
°F
°C
in/in/°Fx10-6
mm/mm/°Cx10-6
70- 200
21-93
5.96
10.7
70-500
21-260
6.18
11.1
70- 800
21-427
6.54
11.8
70-1100
21-593
6.82
12.3
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