Cpm9V Material Powder Metallurgy Tool Steel Black Surface Forging Steel Hot Rolled Steel Flat Bar Round Bar

• Type: Special Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Forged
• Shape: Bar
• Surface Treatment: Polished
• Model NO.: powder tool steel
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar
• Length: 2500-5500mm
• Material: HSS
• Usage: Gear Hob
• Customized Support: OEM
• Transport Package: N/M
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7226911000
• Production Capacity: 1000ton/Month

Product Description

Detailed Photos

Product Description

CPM 9V is made by the Crucible Particle Metallurgy process. Its composition is a modification of CPM 10V with lower carbon and vanadium to improve toughness and heat check resistance. These enhanced 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 lack 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.

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:

CPM 9V	Carbon	Chromium	Vanadium	Molybdenum
	1.90%	5.25%	9.10%	1.30%

Physical Properties:
Elastic Modulus        32 X 106psi       (221 GPa)
Density                .269 lbs./in3     (7.455 g/cm3)
Thermal Conductivity 
BTU/hr-ft-°F          W/m-°K            cal/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           °C             in/in/°F m            m/mm/°C
70 - 200      (20 - 90)       6.15X10-6              (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°) Do not forge below 1700°F (930°C). Slow Cool. Annealing: Heat to 1650°F (900°C), hold 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: About BHN 223-255

Stress Relieving Annealed Parts: Heat to 1100-1300°F (595-700°C), hold 2 hours, then furnace cool or cool in still air.

Hardened Parts:
Heat to 25-30°F (15°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.

Austenitize:
1850-2150°F (1025-1175°C), hold time at temper ature 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 tough ness 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. (See Table)

Size Change: +0.01%

Recommended Heat Treatment:
For the best combination of toughness and wear resistance, austenitize 9V at 2050°F (1120°C), hold 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 obtain higher hardness, at a slight decrease in impact resistance. The lower austenitizing temperatures provide the best impact toughness.

Surface Treatments Because of its high tempering temperatures (>1000°F) CPM 9V is suitable for nitriding, PVD coating or similar surface treatments. CVD coating processes generally exceed the critical temperature and may result in non-predictable dimensional changes.