Crucible Steel CPM® S35VN™ Stainless Steel

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Crucible Steel CPM® S35VN™ Stainless Steel
Categories:	Metal; Ferrous Metal; Martensitic; Stainless Steel
Material Notes:	CPM S35VN is a martensitic stainless steel designed to offer improved toughness over CPM S30V. It is also easier to machine and polish than CPM S30V. Its chemistry has been rebalanced so that it forms some niobium carbides along with vanadium and chromium carbides. Substituting niobium carbides for some of the vanadium carbides makes CPM S35VN about 15-20% tougher than CPM S30V without any loss of wear resistance. CPM S35VN’s improved toughness gives it better resistance to edge chipping. Because both vanadium and niobium carbides are harder and more effective than chromium carbides in providing wear resistance, the CPM stainless blade steels offer improved edge retention over conventional high chromium steels such as 440C and D2. 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
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Physical Properties	Original Value	Comments

Density	7.47 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Rockwell C	>= 56.5	austenitized at 1900°F, tempered at 1000°F + freeze
	60.5	austenitized at 1900°F then quenched
	<= 64	austenitized at 2000°F, oil quenched + freeze
	57 @Tempering Temp. 538 °C	austenitized at 1900°F then quenched and tempered
	57.5 @Tempering Temp. 204 °C	austenitized at 1900°F then quenched and tempered
	57.5 @Tempering Temp. 316 °C	austenitized at 1900°F then quenched and tempered
Modulus of Elasticity	221 GPa
Charpy Impact	12.0 ft-lb	Transverse 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	1.4 %
Chromium, Cr	14 %
Iron, Fe	79.1 %	as balance
Molybdenum, Mo	2.0 %
Niobium, Nb (Columbium, Cb)	0.50 %
Vanadium, V	3.0 %

Descriptive Properties
Edge Retention	1.45	CATRA Testing Relative to 440C
Pitting Resistance	250 mV	polarization curves in 5% NaCl

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NCRUC903 / 160354

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