Crucible Steel CPM® S45VN™ Martensitic Stainless Steel

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Crucible Steel CPM® S45VN™ Martensitic Stainless Steel
Categories:	Metal; Ferrous Metal; Stainless Steel
Material Notes:	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. Information provided by Crucible Industries LLC.
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Physical Properties	Original Value	Comments

Density	7.47 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	59.0 @Treatment Temp. 540 - 1040 °C	Austenitized at 1040°C; Tempered at 540°C
	59.5 @Treatment Temp. 315 - 1040 °C	Austenitized at 1040°C; Tempered at 315°C
	59.7 @Treatment Temp. 315 - 1070 °C	Austenitized at 1070°C; Tempered at 315°C
	60.0 @Treatment Temp. 540 - 1070 °C	Austenitized at 1070°C; Tempered at 540°C
	60.0 @Treatment Temp. 315 - 1095 °C	Austenitized at 1095°C; Tempered at 315°C
	62.0 @Treatment Temp. 540 - 1095 °C	Austenitized at 1095°C; Tempered at 540°C
	63.0 @Treatment Temp. 1040 °C	Austenitized at 1040°C, As Quenched
	64.0 @Treatment Temp. 1070 °C	Austenitized at 1070°C, As Quenched
	64.5 @Treatment Temp. 1095 °C	Austenitized at 1095°C, As Quenched
Modulus of Elasticity	221 GPa
Charpy Impact	11.0 ft-lb	Transverse Charpy C-notch

Thermal Properties	Original Value	Comments
CTE, linear	11.0 µm/m-°C @Temperature 20.0 - 200 °C
	11.5 µm/m-°C @Temperature 20.0 - 315 °C
Thermal Conductivity	17.31 W/m-K @Temperature 93.0 °C

Component Elements Properties	Original Value	Comments
Carbon, C	1.48 %
Chromium, Cr	16.0 %
Iron, Fe	76.9 %	Balance
Molybdenum, Mo	2.00 %
Niobium, Nb (Columbium, Cb)	0.500 %
Nitrogen, N	0.150 %
Vanadium, V	3.00 %

Descriptive Properties
Edge Retention	143	CATRA Testing; 440C = 100

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NCRUC072 / 323333

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