Crucible Steel 15-5 Precipitation Hardening Stainless Steel

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Crucible Steel 15-5 Precipitation Hardening Stainless Steel
Categories:	Metal; Ferrous Metal; Martensitic; Stainless Steel; Precipitation Hardening Stainless
Material Notes:	Crucible 15-5 is a Premium Quality precipitation-hardening stainless steel which is capable of high strength and hardness levels after a relatively simple heat-treatment procedure. This grade is a Vacuum Arc remelted for improved cleanliness. Crucible 15-5 is martensitic and magnetic in both the solution-treated and precipitation hardened conditions. It has a high resistance to crack propagation, good transverse properties, and corrosion resistance is normally superior to the regular martensitic chromium-type stainless steels. Because of the single low-temperature(900-1150°F) precipitation-hardening heat treatment of this grade, scaling and distortion are virtually eliminated. This enables material to be finish machined to close tolerances 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
Shear Modulus	10000 ksi	H1075 and H1150
	11200 ksi	H900

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	14 - 15.5 %
Copper, Cu	2.5 - 4.5 %
Iron, Fe	>= 71.91 %	As Remainder
Manganese, Mn	<= 1.0 %
Nb + Ta	0.15 - 0.45 %
Nickel, Ni	3.5 - 5.5 %
Phosphorus, P	<= 0.040 %
Silicon, Si	<= 1.0 %
Sulfur, S	<= 0.030 %

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NCRUC051 / 16044

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