CPM 9V, crafted through the innovative Crucible Particle Metallurgy process, is a refined version of CPM 10V with reduced carbon and vanadium content. This modification enhances toughness and resistance to heat checking. These superior attributes enable CPM 9V to excel in challenging applications where high-carbon, high-chromium tool steels such as CPM 10V or high-speed steels fall short in toughness or heat check resistance. Additionally, CPM 9V surpasses lower alloy and hot work tool steels in wear resistance. The CPM process ensures a uniformly high-quality steel, offering exceptional dimensional stability, grindability, and toughness compared to traditional steel manufacturing methods.
Typical Applications:
Forming Rolls
Punches
Rolling Mill Rolls
Dies
Header Tooling
Slitter Knives
Extrusion Tooling
Shear Blades
Pelletizer Blades
Granulator Blades
Plasticizing Components: Non-return Valves and Screws
Chemical Composition:
Physical Properties:
Elastic Modulus32 X 10^6 psi
(221 GPa)
Density.269 lbs./in^3
(7.455 g/cm^3)
Thermal Conductivity
BTU/hr-ft-°F W/m-°Kcal/cm-s-°C
72°F 22°C
11.83
20.48
4.89 X 10^-2
212°F 100°C
12.48
21.60
5.16 X 10^-2
392°F 200°C
13.35
23.10
5.52 X 10^-2
572°F 300°C
14.59
25.25
6.03 X 10^-2
932°F 500°C
14.91
25.81
6.16 X 10^-2
1004°F 540°C
15.07
26.08
6.23 X 10^-2
Coefficient of Thermal Expansion
°F°Cin/in/°Fm/m/°C
70 - 200
(20 - 90)
6.15 X 10^-6
(11.07X10-6)
70 - 400
(20 - 200)
6.21X10-6
(11.18X10-6)
70 - 800
(20 - 430)
6.45X10-6
(11.61X10-6)
70 - 1200
(20 - 650)
6.59X10-6
(11.86X10-6)
Thermal Treatments:
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 than 30°F (15°C) per hour to 1000°F (540°C), then furnace cool or cool in still air to room temperature. Annealed
Hardness: Approximately BHN 223-255
Stress Relieving Annealed Parts: Heat to 1100-1300°F (595-700°C), hold for 2 hours, then furnace cool or cool in still air.
Hardened Parts:
Heat to 25-30°F (15°C) below the original tempering temperature, hold for 2 hours, then furnace cool or cool in still air. Straightening: Best performed warm at 400-800°F (200-430°C).
Hardening Preheat:
Heat to 1550-1600°F (845-870°C). Equalize. A second pre-heat stage at 1850-1900°F (1010-1040°C) is suggested for vacuum or atmosphere hardening.
Austenitize:
1850-2150°F (1025-1175°C), hold time at temperature for 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 maximum attainable toughness for a given hardening treatment. Vacuum or atmosphere quench rate through the 1850-1300°F (1010-705°C) range is critical to achieve optimal heat treatment response.
Temper:
Double temper at 1000°F (540°C) minimum. 2 hours minimum each time. (See Table).
Size Change: +0.01%
Recommended Heat Treatment:
For the optimal combination of toughness and wear resistance, austenitize 9V at 2050°F (1120°C), hold for 30-45 minutes, and quench. Temper 3 times at 1025°F (550°C).
Aim Hardness: 54-56 HRC.
Higher austenitizing temperatures can be used to achieve higher hardness, though with a slight decrease in impact resistance. Lower austenitizing temperatures offer the best impact toughness.
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