Carpenter Gall-Tough® Stainless

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Carpenter Gall-Tough® Stainless
Categories:	Metal; Ferrous Metal; Stainless Steel; T S20000 Series Stainless Steel
Material Notes:	Data provided by Carpenter Technology Corporation. 6.4 mm diameter tensile specimens from center of 25.4 mm diameter bar annealed 1066°C 1 hour, water quenched, and ground. Threshold Galling Stress 103 MPa (higher stress tests not performed). The avg. total volume loss on the wear test is 5 mm³ at 100 rpm. Gall-Tough® stainless is a high silicon, high manganese, nitrogen strengthened, austenitic stainless alloy which possesses superior self-mated galling resistance and metal-to-metal wear resistance. The alloy possesses higher strength and high temperature oxidation resistance than Type 304 stainless with comparable corrosion resistance, depending on the environment. Gall-Tough® is a registered trademark of Carpenter Technology Corporation.
Key Words:	ASTM A479; ASTM A276; ASTM A314; ASTM A580; ASTM A240
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Physical Properties	Original Value	Comments

Density	7.85 g/cc @Temperature 23.0 °C

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	1110 MPa
	138 MPa @Temperature 871 °C
	407 MPa @Temperature 649 °C
	531 MPa @Temperature 482 °C
	545 MPa @Temperature 427 °C
	565 MPa @Temperature 371 °C
	569 MPa @Temperature 316 °C
	593 MPa @Temperature 260 °C
	608 MPa @Temperature 204 °C
	662 MPa @Temperature 149 °C
	724 MPa @Temperature 93.0 °C
Tensile Strength, Yield	414 MPa @Strain 0.2 %
	131 MPa @Strain 0.2 %, Temperature 871 °C
	172 MPa @Strain 0.2 %, Temperature 649 °C
	193 MPa @Strain 0.2 %, Temperature 482 °C
	200 MPa @Strain 0.2 %, Temperature 427 °C
	207 MPa @Strain 0.2 %, Temperature 316 °C
	207 MPa @Strain 0.2 %, Temperature 371 °C
	214 MPa @Strain 0.2 %, Temperature 260 °C
	234 MPa @Strain 0.2 %, Temperature 204 °C
	269 MPa @Strain 0.2 %, Temperature 149 °C
	310 MPa @Strain 0.2 %, Temperature 93.0 °C
Elongation at Break	63 %	in 4D
	56 % @Temperature 482 °C	in 4D
	58 % @Temperature 649 °C	in 4D
	62 % @Temperature 427 °C	in 4D
	67 % @Temperature 371 °C	in 4D
	68 % @Temperature 204 °C	in 4D
	69 % @Temperature 260 °C	in 4D
	69 % @Temperature 316 °C	in 4D
	70 % @Temperature 149 °C	in 4D
	74 % @Temperature 93.0 °C	in 4D
	109 % @Temperature 871 °C	in 4D
Reduction of Area	67 %
	70 % @Temperature 649 °C
	76 % @Temperature 482 °C
	76 % @Temperature 260 °C
	76 % @Temperature 316 °C
	77 % @Temperature 371 °C
	77 % @Temperature 427 °C
	77 % @Temperature 204 °C
	78 % @Temperature 149 °C
	80 % @Temperature 93.0 °C
	90 % @Temperature 871 °C
Modulus of Elasticity	171.1 GPa @Temperature 23.0 °C

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000716 ohm-cm @Temperature 23.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	17.3 µm/m-°C @Temperature 25.0 - 100 °C
	17.73 µm/m-°C @Temperature 25.0 - 250 °C
	18.5 µm/m-°C @Temperature 25.0 - 500 °C
Specific Heat Capacity	0.5145 J/g-°C @Temperature 52.0 - 102 °C
Thermal Conductivity	12.22 W/m-K @Temperature 50.0 °C
	13.49 W/m-K @Temperature 100 °C
	15.33 W/m-K @Temperature 200 °C
	17.03 W/m-K @Temperature 300 °C
	18.6 W/m-K @Temperature 400 °C
Maximum Service Temperature, Air	982 °C	Scaling Temperature for Continuous Service

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.15 %
Chromium, Cr	15 - 18 %
Iron, Fe	68 %	as remainder
Manganese, Mn	4.0 - 6.0 %
Molybdenum, Mo	0.50 - 2.5 %
Nickel, Ni	4.0 - 6.0 %
Nitrogen, N	0.080 - 0.20 %
Phosphorus, P	<= 0.040 %
Silicon, Si	3.0 - 4.0 %
Sulfur, S	<= 0.040 %

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NCAR20 / 15603

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