Cpm S90V Material Powder Metallurgy Stainless 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 stainless 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 S90V is a unique tool steel made by the Crucible Particle Metallurgy process. It is a martensitic stainless steel with a high volume of vanadium carbides for excep tionally good wear resistance. S90V offers substantial improvements in wear resistance over 440C and D2, and other high chromium tool steels, with corrosion resistance equal to or better than 440C. Its high vanadium content favors the formation of hard vanadium carbides instead of chromium carbides for wear resistance, leaving sufficient chromium in the matrix to provide good corrosion resistance. The wear and corrosion resistance of S90V make it an excellent candidate to replace 440C, where increased wear is a primary concern. It can replace D2 or other tool steels in applications where improved corrosion resistance is also of benefit. The CPM process results in a finer, more uniform carbide distribution imparting improved toughness and grindability to high alloy steels. The CPM process also allows the design of more highly alloyed grades which cannot be produced by conventional steelmaking.

Typical Applications:
Plastic Injection and Extrusion Feedscrews
Non-return Valve Components
Pelletizing Equipment
Gate and Nozzle Inserts
Industrial Knives, Slitters, and Cutters
Long-wearing Specialty Cutlery
Injection Molds and Inserts
Wear Components for Food and Chemical Processing
Bearings, Bushings, Valves, Rolls
Gear Pumps

Note: These are some typical applications. Your specific application should not be undertaken without independent study and evaluation for suitability


Chemical Composition:

	Carbon	Chromium	Vanadium	Molybdenum
CPM S90V	2.3%	14.0%	9.0%	1.0%

Thermal Treatments:
Annealing
Heat to 1650° F (900°C), hold 2 hours, slow cool at a maximum rate of 25°F (15°C) per hour to 1100° F (595C°), then furnace cool or cool in still air to room temperature
Annealed Hardness: Approx. BHN 277

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 to 25-50°F (15-30°C) below original tempering temperature, hold 2 hours, then furnace cool or cool in still air.

Hardening
Austenitize: 
2100-2150°F (1150-1175°C) Hold time at temperature: 20 minutes

Quench:
Salt quench, interrupted oil quench, positive pressure gas quench or air cool at a minimum cooling rate of 150°F/min (80°C/min) to below 1000°F (540°C). Cool to below 125°F (50° C) before tempering. For optimum vacuum heat treatment response, a minimum 4 bar gas quench is recommended.

Temper:
Double temper at 400-750° F (200-400°C). Hold for a miniumum of 2 hrs. each temper. For optimum stress relieving and dimensional stability, S90V may be double tempered at 1000-1025° F (540-550°C), but tempering above 800°F (425°C) may result in some loss of corrosion resistance. A freezing treatment may be employed between the first and second tem pers, if desired. Freezing treatments should always be followed by at least one temper.

PLEASE NOTE: Tempering between about 800 and 1000°F (425 and 540°C) is not recommended. All martensitic stainless steels suffer from embrittlement when tempered in this range.

Tempering Temperatures
400°- 800°F   (200°-425°C) Best Corrosion Resistance & Wear Resistance 800°-1000°F (425°-540°C) AVOID THIS RANGE (Embrittlement) 1000°-1025°F  (540°-550°C) Stress Relieving and Dimensional Stability

Aim Hardness: HRC 56/59
Size Change:
+0.03 to +0.05% Size change shown is for a fully martensitic microstructure. The presence of retained austenite may reduce the net growth. When tempering at 400-750°F (200-400°C), freezing treatments may be necessary to minimize retained austenite.