Crucible Steel 17Cr-4Ni Precipitation Hardening Stainless Steel

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Crucible Steel 17Cr-4Ni Precipitation Hardening Stainless Steel
Categories:	Metal; Ferrous Metal; Martensitic; Stainless Steel; Precipitation Hardening Stainless
Material Notes:	Crucible 17Cr-4Ni is a precipitation-hardening stainless steel which is capable of a high strength and hardness levels after a relatively simple heat-treatment procedure. This grade is martensitic and magnetic in both the solution-treated and precipitation-hardened conditions. It has high resistance to crack propagation, good transverse properties, and corrosion resistance is normally superior to the regular martensitic chromium-type of stainless steel. Because of the single low-temperature (900-1150°F) precipitation-hardening heat treatment of this grade, scaling and distortion are virtually eliminated. This enables materials to be finish machined to close tolerance prior to heat treatment. Information provided by Crucible Specialty Metals.
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Physical Properties	Original Value	Comments

Density	0.280 lb/in³	A
	0.284 lb/in³	H1150

Mechanical Properties	Original Value	Comments
Hardness, Brinell	302	A
	332	H1100
	409	H925
Hardness, Rockwell C	27	H1150-M
	36	H1075
	44	H900
Tensile Strength, Ultimate	125000 psi	H1150-M
	150000 psi	A
	170000 psi	H1025
	96000 psi @Temperature 538 °C	H1150
	119000 psi @Temperature 538 °C
	124000 psi @Temperature 316 °C	H1150
	173000 psi @Temperature 316 °C	H900
Tensile Strength, Yield	125000 psi @Strain 0.2 %	H1150
	150000 psi @Strain 0.2 %	H1075
	185000 psi @Strain 0.2 %	H900
	93000 psi @Strain 2 %, Temperature 538 °C	H1150
	106000 psi @Strain 2 %, Temperature 538 °C	H900
	120000 psi @Strain 2 %, Temperature 316 °C	H1150
	150000 psi @Strain 2 %, Temperature 316 °C	H900
Elongation at Break	10 %	in 2", A
	15 %	in 2", H1025
	22 %	in 2", H1150-M
	10 % @Temperature 316 °C	in 2"; H900
	12 % @Temperature 316 °C	in 2", H1150
	15 % @Temperature 538 °C	in 2"; H900
	15 % @Temperature 538 °C	in 2", H1150
Reduction of Area	50 %	H900
	54 %	H925
	58 %	H1100
	31 % @Temperature 316 °C	H900
	46 % @Temperature 538 °C	H900
	54 % @Temperature 316 °C	H1150
	55 % @Temperature 538 °C	H1150
Rupture Strength	413.7 MPa @Temperature 32.2 °C, Time 3.60e+6 sec
	655.0 MPa @Temperature 482 °C, Time 360000 sec
	1089 MPa @Temperature 316 °C, Time 3.60e+6 sec
	1131 MPa @Temperature 316 °C, Time 360000 sec
Tensile Modulus	28500 ksi	H900
Poissons Ratio	0.27	H900; Calculated
Fatigue Strength	77000 psi @# of Cycles 1.00e+8
	90000 psi @# of Cycles 1.00e+7
Shear Modulus	10000 ksi	H1075 and H1150
	11200 ksi	H900
Charpy Impact	17.0 ft-lb	H900
	27.0 ft-lb	H1150-M

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000770 ohm-cm	H900
	0.0000980 ohm-cm	A

Thermal Properties	Original Value	Comments
CTE, linear	6.00 µin/in-°F @Temperature 21.1 - 93.3 °C	A and H900
	6.30 µin/in-°F @Temperature 21.1 - 93.3 °C	H1075
	6.30 µin/in-°F @Temperature 21.1 - 427 °C	A
	6.60 µin/in-°F @Temperature 21.1 - 93.3 °C	H1150
	7.20 µin/in-°F @Temperature 21.1 - 427 °C	H1150
Specific Heat Capacity	0.110 BTU/lb-°F @Temperature 0.000 - 100 °C
Thermal Conductivity	124 BTU-in/hr-ft²-°F @Temperature 149 °C	H900
	157 BTU-in/hr-ft²-°F @Temperature 482 °C	H900

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.070 %
Chromium, Cr	15.5 - 17.5 %
Copper, Cu	3.0 - 5.0 %
Iron, Fe	>= 69.91 %	As Remainder
Manganese, Mn	<= 1.0 %
Nb + Ta	0.15 - 0.45 %
Nickel, Ni	3.0 - 5.0 %
Phosphorus, P	<= 0.040 %
Silicon, Si	<= 1.0 %
Sulfur, S	<= 0.030 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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NCRUC052 / 16045

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