CPM 9V, crafted using the renowned Crucible Particle Metallurgy process, is an evolution of CPM 10V, engineered with reduced carbon and vanadium content to significantly enhance toughness and heat check resistance. These optimized properties empower CPM 9V to excel in demanding 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, it outperforms lower alloy and hot work tool steels, which often lack adequate wear resistance. The CPM process ensures an extraordinarily homogeneous steel, distinguished by its superior dimensional stability, exceptional grindability, and outstanding toughness, far surpassing steels manufactured through conventional 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 psi
(221 GPa)
Density.269 lbs./in³
(7.455 g/cm³)
Thermal Conductivity
BTU/hr-ft-°FW/m-°Kcal/cm-s-°C
72°F (22°C)
11.83
20.48
4.89 X 10²
212°F (100°C)
12.48
21.60
5.16 X 10²
392°F (200°C)
13.35
23.10
5.52 X 10²
572°F (300°C)
14.59
25.25
6.03 X 10²
932°F (500°C)
14.91
25.81
6.16 X 10²
1004°F (540°C)
15.07
26.08
6.23 X 10²
Coefficient of Thermal Expansion
°F°Cin/in/°Fm/m/°C
70 - 200°F
(20 - 90°C)
6.15 X 10
(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). Never forge below 1700°F (930°C). Cool slowly. Annealing: Heat to 1650°F (900°C), hold for 2 hours, then cool slowly, not faster than 30°F (15°C) per hour down to 1000°F (540°C). Afterward, cool in the furnace or 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 cool in the furnace or in still air.
Hardened Parts:
Heat to 25-30°F (15°C) below the original tempering temperature, hold for 2 hours, then cool in the furnace or in still air. Straightening should be done warm, between 400-800°F (200-430°C).
Hardening Preheat:
Heat to 1550-1600°F (845-870°C) and equalize. A second preheat stage at 1850-1900°F (1010-1040°C) is suggested for vacuum or atmosphere hardening.
Austenitize:
Heat to 1850-2150°F (1025-1175°C) and hold at the target temperature for 30-45 minutes.
Quench:
Air or positive pressure quench (minimum 2 bar) to below 125°F (50°C), or use a salt or interrupted oil quench to approximately 1000°F (540°C), then air cool to below 125°F (50°C). A salt bath treatment, if feasible, ensures maximum attainable toughness for a given hardening treatment. The vacuum or atmosphere quench rate through the 1850-1300°F (1010-705°C) range is critical for achieving optimum heat treatment response.
Temper:
Double temper at a minimum of 1000°F (540°C) for at least 2 hours each time. (Refer to the table for more details)
Size Change: +0.01%
Recommended Heat Treatment:
For an optimal blend of toughness and wear resistance, austenitize the S90V at 2050°F (1120°C) for 30-45 minutes, then quench. Temper three times at 1025°F (550°C).
Target hardness: 54-56 HRC.
Higher austenitizing temperatures can achieve higher hardness but may slightly reduce impact resistance. Lower austenitizing temperatures offer the best impact toughness.
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