AK Steel NITRONIC® 30 Austenitic Stainless Steel

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AK Steel NITRONIC® 30 Austenitic Stainless Steel
Categories:	Metal; Ferrous Metal; Stainless Steel
Material Notes:	AK Steel NITRONIC 30 Stainless Steel offers significantly higher strength than Type 304 and potential for applications requiring good resistance to aqueous and atmospheric corrosion resistance combined with good toughness and economy. Specific potential applications include automotive hose clamps, safety belt anchors, truck and bus frames, water supply and control structures, sewage treatment plant structures, bulk solids handling equipment, magnetic ore separator screens, coal buckets and hopper cars. Stainless steels have served successfully in many structural components in the transportation industry. Bus space frames and bumpers take advantage of the excellent fabricability and high strength and toughness of stainless steel. Tensilized NITRONIC 30 Stainless Steel has been used in rapid transit structurals where the strength-to-weight ratio of up to three times that of carbon steel has improved operating efficiency. Rear frames of refrigerated trucks are easily welded and formed from NITRONIC 30 Stainless Steel, resulting in protective units that can withstand impact blows without cracking. Shipboard container structurals use stainless steel successfully where carbon steel becomes scuffed and rusts wherever the paint is damaged. AK Steel NITRONIC 30 is a nitrogen-strengthened stainless steel developed for applications requiring a good level of aqueous corrosion resistance combined with good toughness and economy. AK Steel NITRONIC 30 Stainless Steel provides approximately 50% higher yield strength than Type 304L and, therefore, may allow lighter gauges to further reduce costs. AK Steel NITRONIC 30 Stainless Steel work hardens rapidly while retaining good ductility. Unlike other nitrogen-strengthened stainless steels, AK Steel NITRONIC 30 Stainless Steel is subject to magnetic transformation when cold worked. Information provided by AK Steel
Key Words:	UNS S20400
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Physical Properties	Original Value	Comments

Density	7.86 g/cc	Based on UNS number

Mechanical Properties	Original Value	Comments
Hardness, Rockwell B	95	0% Cold Work
	92.5 @Temperature 23.9 °C	Plate
	96.5 @Temperature 23.9 °C
	92 @Thickness 22.2 mm	Typical for Plate, Annealed, in 2"
	93 @Thickness 1.63 mm	Annealed at 2050°F, Longitudinal
	93 @Thickness 1.63 mm	Annealed at 2050°F, Transverse
	93.5 @Thickness 3.15 mm	Annealed at 1950°F, Longitudinal
	94 @Thickness 9.52 mm	Typical for Plate, Annealed
	94 @Thickness 0.813 mm	Annealed at 1950°F, Longitudinal
	94 @Thickness 0.813 mm	Annealed at 1950°F, Longitudinal
Hardness, Rockwell C	31	10% Cold Work
	37	20% Cold Work
	43	30% Cold Work
	45	40% Cold Work
	33.5 @Thickness 4.762 mm	Typical for Plate, 1/4-Hard, Longitudinal
	33.5 @Thickness 4.762 mm	Typical for Plate, 1/4-Hard, Transverse
	34 @Thickness 6.35 mm	Typical for Plate, 1/4-Hard, Longitudinal
	34 @Thickness 6.35 mm	Typical for Plate, 1/4-Hard, Transverse
Tensile Strength, Ultimate	862 MPa	0% Cold Work
	1034 MPa	10% Cold Work
	1193 MPa	20% Cold Work
	1338 MPa	30% Cold Work
	1467 MPa	40% Cold Work
	66.5 ksi @Temperature 538 °C	Sheet
	70.3 ksi @Temperature 482 °C	Sheet
	73.4 ksi @Temperature 427 °C	Sheet
	76.7 ksi @Temperature 371 °C	Sheet
	79.3 ksi @Temperature 316 °C	Sheet
	79.3 ksi @Temperature 260 °C	Sheet
	81.4 ksi @Temperature 204 °C	Sheet
	86.8 ksi @Temperature 149 °C	Sheet
	100 ksi @Temperature 93.3 °C	Sheet
	123 ksi @Temperature 23.9 °C	Sheet
	417 MPa @Temperature 538 °C	Plate
	439 MPa @Temperature 482 °C	Plate
	460 MPa @Temperature 427 °C	Plate
	480 MPa @Temperature 371 °C	Plate
	487 MPa @Temperature 260 °C	Plate
	488 MPa @Temperature 316 °C	Plate
	496 MPa @Temperature 204 °C	Plate
	539 MPa @Temperature 149 °C	Plate
	630 MPa @Temperature 93.3 °C	Plate
	850 MPa @Temperature 23.9 °C	Plate
	689 MPa @Thickness 1.63 mm	Annealed at 2050°F, Longitudinal
	711 MPa @Thickness 1.63 mm	Annealed at 2050°F, Transverse
	786 MPa @Thickness 9.52 mm	Typical for Plate, Annealed
	811 MPa @Thickness 3.15 mm	Annealed at 1950°F, Longitudinal
	825 MPa @Thickness 0.813 mm	Annealed at 1950°F, Longitudinal
	827 MPa @Thickness 50.8 mm	Typical for Plate, Annealed
	840 MPa @Thickness 0.813 mm	Annealed at 1950°F, Longitudinal
	855 MPa @Thickness 22.2 mm	Typical for Plate, Annealed
	998 MPa @Thickness 6.35 mm	Typical for Plate, 1/4-Hard, Longitudinal
	1011 MPa @Thickness 6.35 mm	Typical for Plate, 1/4-Hard, Transverse
	1020 MPa @Thickness 4.762 mm	Typical for Plate, 1/4-Hard, Longitudinal
	1025 MPa @Thickness 4.762 mm	Typical for Plate, 1/4-Hard, Transverse
Tensile Strength, Yield	345 MPa @Strain 0.2 %	Typical for Plate, Annealed, 0.875"
	358 MPa @Strain 0.2 %	Typical for Plate, Annealed, 2"
	393 MPa @Strain 0.2 %	Typical for Plate, Annealed, 0.0375"
	393 MPa @Strain 0.2 %	0% Cold Work
	593 MPa @Strain 0.2 %	10% Cold Work
	702 MPa @Strain 0.2 %	Typical for Plate, 1/4-Hard, Longitudinal, 0.25"
	717 MPa @Strain 0.2 %	Typical for Plate, 1/4-Hard, Longitudinal, 0.1875'
	759 MPa @Strain 0.2 %	Typical for Plate, 1/4-Hard, Transverse, 0.25"
	768 MPa @Strain 0.2 %	Typical for Plate, 1/4-Hard, Transverse, 0.1875"
	779 MPa @Strain 0.2 %	20% Cold Work
	979 MPa @Strain 0.2 %	30% Cold Work
	1186 MPa @Strain 0.2 %	40% Cold Work
	27.1 ksi @Strain 0.2 %, Temperature 538 °C	Sheet
	28.6 ksi @Strain 0.2 %, Temperature 482 °C	Sheet
	30.0 ksi @Strain 0.2 %, Temperature 427 °C	Sheet
	33.8 ksi @Strain 0.2 %, Temperature 316 °C	Sheet
	34.9 ksi @Strain 0.2 %, Temperature 260 °C	Sheet
	37.6 ksi @Strain 0.2 %, Temperature 204 °C	Sheet
	41.1 ksi @Strain 0.2 %, Temperature 149 °C	Sheet
	47.3 ksi @Strain 0.2 %, Temperature 93.3 °C	Sheet
	63.1 ksi @Strain 0.2 %, Temperature 23.9 °C	Sheet
	131 MPa @Strain 0.2 %, Temperature 538 °C	Plate
	155 MPa @Strain 0.2 %, Temperature 482 °C	Plate
	157 MPa @Strain 0.2 %, Temperature 427 °C	Plate
	168 MPa @Strain 0.2 %, Temperature 371 °C	Plate
	174 MPa @Strain 0.2 %, Temperature 316 °C	Plate
	182 MPa @Strain 0.2 %, Temperature 260 °C	Plate
	190 MPa @Strain 0.2 %, Temperature 204 °C	Plate
	217 MPa @Strain 0.2 %, Temperature 371 °C	Sheet
	222 MPa @Strain 0.2 %, Temperature 149 °C	Plate
	266 MPa @Strain 0.2 %, Temperature 93.3 °C	Plate
	362 MPa @Strain 0.2 %, Temperature 23.9 °C	Plate
	368 MPa @Strain 0.2 %, Thickness 1.63 mm	Annealed at 2050°F, Transverse
	370 MPa @Strain 0.2 %, Thickness 1.63 mm	Annealed at 2050°F, Longitudinal
	372 MPa @Strain 0.2 %, Thickness 3.15 mm	Annealed at 1950°F, Longitudinal
	375 MPa @Strain 0.2 %, Thickness 0.813 mm	Annealed at 1950°F, Longitudinal
	379 MPa @Strain 0.2 %, Thickness 0.813 mm	Annealed at 1950°F, Longitudinal
Elongation at Break	15 %	In 2", 40% Cold Work
	18 %	In 2", 30% Cold Work
	25 %	In 2", 20% Cold Work
	35 %	In 2",10% Cold Work
	49 %	In 2", 0% Cold Work
	42.9 % @Temperature 538 °C	In 2", Plate
	46.4 % @Temperature 316 °C	In 2", Plate
	47.7 % @Temperature 482 °C	In 2", Plate
	48 % @Temperature 204 °C	In 2", Plate
	48.3 % @Temperature 427 °C	In 2", Plate
	48.6 % @Temperature 260 °C	In 2", Plate
	49 % @Temperature 371 °C	In 2", Plate
	50 % @Temperature 23.9 °C	In 2", Plate
	65.5 % @Temperature 149 °C	In 2", Plate
	77.8 % @Temperature 93.3 °C	In 2", Plate
	29.6 % @Thickness 6.35 mm	In 2", Typical for Plate, 1/4-Hard, Transverse
	31.5 % @Thickness 4.762 mm	In 2", Typical for Plate, 1/4-Hard, Transverse
	35.5 % @Thickness 4.762 mm	In 2", Typical for Plate, 1/4-Hard, Longitudinal
	35.5 % @Thickness 6.35 mm	In 2", Typical for Plate, 1/4-Hard, Longitudinal
	31 - 40 % @Thickness 50.8 mm	Typical, (Gauge, 0.028" -0.084")
	50 % @Thickness 22.2 mm	In 2", Typical for Plate, Annealed
	52 % @Thickness 3.15 mm	In 2", Annealed at 1950°F, Longitudinal
	54 % @Thickness 0.813 mm	In 2", Annealed at 1950°F, Longitudinal
	54 % @Thickness 50.8 mm	In 2", Typical for Plate, Annealed
	55 % @Thickness 0.813 mm	In 2", Annealed at 1950°F, Longitudinal
	56 % @Thickness 9.52 mm	In 2", Typical for Plate, Annealed
	58 % @Thickness 1.63 mm	In 2", Annealed at 2050°F, Transverse
	58.5 % @Thickness 1.63 mm	In 2", Annealed at 2050°F, Longitudinal
	34.1 % @Thickness 50.8 mm, Temperature 538 °C	in 2", Sheet
	40.7 % @Thickness 50.8 mm, Temperature 482 °C	in 2", Sheet
	41.30 % @Thickness 50.8 mm, Temperature 260 °C	in 2", Sheet
	41.30 % @Thickness 50.8 mm, Temperature 316 °C	in 2", Sheet
	43.7 % @Thickness 50.8 mm, Temperature 427 °C	in 2", Sheet
	44.3 % @Thickness 50.8 mm, Temperature 371 °C	in 2", Sheet
	44.8 % @Thickness 50.8 mm, Temperature 204 °C	in 2", Sheet
	46.8 % @Thickness 50.8 mm, Temperature 23.9 °C	in 2", Sheet
	53.7 % @Thickness 50.8 mm, Temperature 149 °C	in 2", Sheet
	63.3 % @Thickness 50.8 mm, Temperature 93.3 °C	in 2", Sheet
Charpy Impact, Unnotched	217 ft-lb	Typical for Plate, Annealed
Charpy Impact, Notched	108.2 J/cm² @Thickness 2.84 mm, Temperature -101 °C	Base Metal
	128.4 J/cm² @Thickness 2.84 mm, Temperature 0.000 °C	Base Metal
	133.7 J/cm² @Thickness 2.84 mm, Temperature 23.9 °C	Base Metal

Thermal Properties	Original Value	Comments
CTE, linear	9.35 µin/in-°F @Temperature 26.1 - 93.3 °C
	9.60 µin/in-°F @Temperature 26.1 - 149 °C
	9.81 µin/in-°F @Temperature 26.1 - 204 °C
	10.0 µin/in-°F @Temperature 26.1 - 260 °C
	10.2 µin/in-°F @Temperature 26.1 - 316 °C
	10.4 µin/in-°F @Temperature 26.1 - 371 °C
	10.5 µin/in-°F @Temperature 26.1 - 427 °C
	10.6 µin/in-°F @Temperature 26.1 - 482 °C
	10.8 µin/in-°F @Temperature 26.1 - 538 °C
	10.9 µin/in-°F @Temperature 26.1 - 593 °C
	11.0 µin/in-°F @Temperature 26.1 - 649 °C
	11.1 µin/in-°F @Temperature 26.1 - 704 °C
	11.21 µin/in-°F @Temperature 26.1 - 760 °C
	11.31 µin/in-°F @Temperature 26.1 - 816 °C
	11.42 µin/in-°F @Temperature 26.1 - 871 °C

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.030 %
Chromium, Cr	15 - 17 %
Copper, Cu	<= 1.0 %
Iron, Fe	68.6 - 76.35 %	Balance
Manganese, Mn	7.0 - 9.0 %
Nickel, Ni	1.5 - 3.0 %
Nitrogen, N	0.15 - 0.30 %
Phosphorus, P	<= 0.040 %
Silicon, Si	<= 1.0 %
Sulfur, S	<= 0.030 %

Descriptive Properties
'n' Value	0.19	Strain Hardening Coefficient, Typical, (Gauge, 0.028" -0.084")
Olsen Cup Height	0.330"-0.450"	Typical, (Gauge, 0.028" -0.084")

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NAKS141 / 138556

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