Cpm S45vn 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
• 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 S45VN is a martensitic stainless steel designed to offer improved corrosion and wear resistance over CPM S35VN. Its chemistry has been rebalanced so that it forms more chromium carbides, while at the same time leaving more free chromium in the matrix. The use of Niobium and Nitrogen in place of some of the Vanadium and Carbon produces an excellent combination of edge retention, wear resistance, corrosion resistance and toughness properties making this the ideal choice for an EDC knife steel.

The CPM process produces very homogeneous, high quality steel characterized by superior dimensional stability, grindability and toughness compared to steels produced by conventional melting practices.
 

	Vanadium	Niobium	Chromium	Total
CPM S45VN	3.0%	0.5%	11.5%	15.0%
CPM S35VN	3.0%	0.5%	10.5%	14.0%
CPM S30V	4.0%		10.5%	14.0%
440C	0%		12.0%	12.0%
154CM	0%		17.5%	17.5%
CPM S90V	9.0%		11.0%	20.0%

Typical Applications:
Long-Wearing Specialty Cutlery Plastic Injection and Extrusion Feed Screws and Dies Non-Return Valve Components Pelletizing Equipment Wear Components for Food and Chemical Processing Note: These are some typical applications. Your specific application should not be undertaken without independent study and evaluation for suitability.

Chemical Composition:

CPM S45VN	Carbon	Chromium	Vanadium	Molybdenum	Niobium	Nitrogen
	1.48%	16.00%	3.00%	2.00%	0.50%	0.15%

Physical Properties:
Elastic Modulus     32 X 106 psi      (221 GPa)
Density              0.27 lbs./in3      (7.47 g/cm3)
Thermal Conductivity 
BTU/hr-ft-°F        W/m-°K          cal/cm-s-°C
200°F     93°C       10             17.31            4.13 X 10-2

Coefficient of Thermal Expansion
°F                °C             in/in/°F          mm/mm/°C
70 - 400        (20 - 200)         6.1 X10-6       (11.0 X10-6)
70 - 600        (20 - 315)         6.4 X10-6       (11.5 X10-6)


Mechanical Properties:
Toughness (Transverse Charpy C-notch Testing)

Grade	Impact Energy
CPM S45VN	11.0 ft. Lbs.
CPM S35VN	12.0 ft. Lbs.
CPM S30V	10.0 ft. Lbs.
154 CM	2.5 ft. Lbs.
CPM S90V	2.5 ft. Lbs.

Although the longitudinal toughness of all four of these grades is about 25-28 ft. lbs., the transverse toughness of the CPM grades is four or more times that of 440C and 154CM. The higher transverse toughness results indicate that CPM S45VN, CPM S35VN and CPM S30V are much more resistant to chipping and breaking in applications which may encounter side loading. In knifemaking, the higher transverse toughness makes CPM especially good for bigger blades.

Edge Retention (CATRA Testing Relative to 440C)

Grade	%
CPM S45VN	143*
CPM S35VN	140
CPM S30V	145
154 CM	120
440C	100

The CATRA (Cutlery & Allied Trades Research Association) test machine performs a standard cutting operation and measures the number of silica impregnated cards which are cut. It is considered a measure of relative wear resistance, reported in this table as compared to a 440C standard. *Estimate based upon market feedback

Thermal Treatments:
Forging: 
2100°F (1150°C) Do not forge below 1750°F (950°C).

Annealing: 
Heat to 1650°F (900°C), hold 2 hours, slow cool no faster than 25°F (15°C) per hour to 1100°F (595°C), then furnace cool or cool in still air to room temperature.

Annealed Hardness: About BHN 255

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.

Straightening:
Best done warm 400-800°F (200-425°C) Hardening Preheat: Heat to 1550-1600°F (845-870°C) Equalize.

Austenitize:
1900-2000°F (1035-1095°C), hold time at temper- ature 15-30 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).

Temper:
Double temper at 400-750°F (200-400°C). Hold for 2 hours minimum each time. (See Table) A freezing treatment may be used between the first and second tempers. Freezing treatments help to attain maximum hardenability and must always be followed by at least one temper.

NOTE: For optimum stress relieving, CPM S45VN may be tempered at 1000-1025°F (540-550°C). Tempering in this range may result in a slight decrease in corrosion resistance.

Size Change: 
+0.05 to +0.10% when fully martensitic. 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.

Recommended Heat Treatment:
Austenitize 1950°F (1065°C). Quench to below 125°F (50°C). Double temper at 600°F (315°C) 2 hrs. minimum each temper. Cool to hand warm between tempers. A freezing treatment may be added between tempers.
Aim hardness: 59-61 HRC.