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AK Steel NITRONIC® 19-D Duplex Stainless Steel
Categories: Metal; Ferrous Metal; Stainless Steel
Material Notes: AK Steel NITRONIC® 19D is a stainless steel with a mixed ferrite and austenite structure. This alloy provides high yield strength (65 ksi minimum {448 MPa}), good drawing and welding characteristics, excellent chloride stress corrosion cracking resistance, and high cyclic oxidation resistance up to 1800°F (982°C). It also exhibits high ductility (super plasticity) at high temperatures (1800°F {982°C}). Compared to similar duplex stainless alloys such as 2205, NITRONIC 19D Stainless Steel is more economical but less corrosion resistant due to lower alloy content (particularly molybdenum). Inclusion in ASTM A 240 has been granted and the alloy is listed in the A 240-97a publication dated March 1998.

Information provided by AK Steel
Key Words: UNS S32001, ASTM A240
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Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell B 91.591.50% Cold Work
 93 - 9893 - 98Typical, (Gauge, 0.028" -0.084")
 97974.0% Cold Work
 99.599.59.8% Cold Work
Hardness, Rockwell C 242415.1% Cold Work
 26.526.520.7% Cold Work
 303040.7% Cold Work
 333357.8% Cold Work
Tensile Strength, Ultimate 681 MPa98800 psi0% Cold Work
 718 MPa104000 psi4% Cold Work
 782 MPa113000 psi9.8% Cold Work
 812 MPa118000 psi15.1% Cold Work
 689 - 993 MPa99900 - 144000 psiTypical, (Gauge, 0.028" -0.084")
 896 MPa130000 psi20.7% Cold Work
 1063 MPa154200 psi40.7% Cold Work
 1186 MPa172000 psi57.8% Cold Work
 17.9 MPa
@Temperature 1090 °C		2600 psi
@Temperature 2000 °F		Transverse
 17.9 MPa
@Temperature 1090 °C		2600 psi
@Temperature 2000 °F		Longitudinal
 27.6 MPa
@Temperature 982 °C		4000 psi
@Temperature 1800 °F		Transverse
 37.9 MPa
@Temperature 982 °C		5500 psi
@Temperature 1800 °F		Longitudinal
 69.6 MPa
@Temperature 871 °C		10100 psi
@Temperature 1600 °F		Transverse
 83.4 MPa
@Temperature 871 °C		12100 psi
@Temperature 1600 °F		Longitudinal
Tensile Strength, Yield  437 MPa
@Strain 0.2 %		63400 psi
@Strain 0.2 %		0% Cold Work
 604 MPa
@Strain 0.2 %		87600 psi
@Strain 0.2 %		4.0% Cold Work
 702 MPa
@Strain 0.2 %		102000 psi
@Strain 0.2 %		9.8% Cold Work
 785 MPa
@Strain 0.2 %		114000 psi
@Strain 0.2 %		15.1% Cold Work
 827 MPa
@Strain 0.2 %		120000 psi
@Strain 0.2 %		20.7% Cold Work
 974 MPa
@Strain 0.2 %		141000 psi
@Strain 0.2 %		40.7% Cold Work
 1090 MPa
@Strain 0.2 %		158000 psi
@Strain 0.2 %		57.8% Cold Work
 5.52 MPa
@Strain 0.2 %,
Temperature 1090 °C		800 psi
@Strain 0.2 %,
Temperature 2000 °F		Transverse
 8.96 MPa
@Strain 0.2 %,
Temperature 1090 °C		1300 psi
@Strain 0.2 %,
Temperature 2000 °F		Longitudinal
 15.9 MPa
@Strain 0.2 %,
Temperature 982 °C		2300 psi
@Strain 0.2 %,
Temperature 1800 °F		Transverse
 22.8 MPa
@Strain 0.2 %,
Temperature 982 °C		3300 psi
@Strain 0.2 %,
Temperature 1800 °F		Longitudinal
 47.6 MPa
@Strain 0.2 %,
Temperature 871 °C		6900 psi
@Strain 0.2 %,
Temperature 1600 °F		Transverse
 57.9 MPa
@Strain 0.2 %,
Temperature 871 °C		8400 psi
@Strain 0.2 %,
Temperature 1600 °F		Longitudinal
 476 - 538 MPa
@Strain 0.2 %,
Temperature 21.1 °C		69000 - 78000 psi
@Strain 0.2 %,
Temperature 70.0 °F
Elongation at Break 5.2 %5.2 %In 2", 40.7% Cold Work
 5.5 %5.5 %In 2", 57.8% Cold Work
 12.1 %12.1 %In 2", 20.7% Cold Work
 14.6 %14.6 %In 2", 15.1% Cold Work
 23.6 %23.6 %In 2", 9.8% Cold Work
 30.1 %30.1 %In 2", 4.0% Cold Work
 34.5 %34.5 %In 2", 0% Cold Work
 31 - 40 %
@Thickness 50.8 mm		31 - 40 %
@Thickness 2.00 in		Typical, (Gauge, 0.028" -0.084")
 82.3 %
@Thickness 50.8 mm,
Temperature 871 °C		82.3 %
@Thickness 2.00 in,
Temperature 1600 °F		in 2", Longitudinal
 88 %
@Thickness 50.8 mm,
Temperature 871 °C		88 %
@Thickness 2.00 in,
Temperature 1600 °F		in 2", Transverse
 113 %
@Thickness 50.8 mm,
Temperature 982 °C		113 %
@Thickness 2.00 in,
Temperature 1800 °F		in 2", Longitudinal
 143 %
@Thickness 50.8 mm,
Temperature 982 °C		143 %
@Thickness 2.00 in,
Temperature 1800 °F		in 2", Transverse
 179.5 %
@Thickness 50.8 mm,
Temperature 1090 °C		179.5 %
@Thickness 2.00 in,
Temperature 2000 °F		in 2", Transverse
 236.5 %
@Thickness 50.8 mm,
Temperature 1090 °C		236.5 %
@Thickness 2.00 in,
Temperature 2000 °F		in 2", Longitudinal
Reduction of Area  61.6 %
@Temperature 871 °C		61.6 %
@Temperature 1600 °F		Transverse
 65 %
@Temperature 871 °C		65 %
@Temperature 1600 °F		Longitudinal
 80 %
@Temperature 982 °C		80 %
@Temperature 1800 °F		Longitudinal
 80 %
@Temperature 982 °C		80 %
@Temperature 1800 °F		Transverse
 84.3 %
@Temperature 1090 °C		84.3 %
@Temperature 2000 °F		Longitudinal
 97 %
@Temperature 1090 °C		97 %
@Temperature 2000 °F		Transverse
Charpy Impact, Notched  15.0 J/cm²
@# of Cycles 2.00 ,
Temperature -101 °C		71.4 ft-lb/in²
@# of Cycles 2.00 ,
Temperature -150 °F		Transverse
 17.8 J/cm²
@# of Cycles 2.00 ,
Temperature -101 °C		84.7 ft-lb/in²
@# of Cycles 2.00 ,
Temperature -150 °F		Longitudinal
 38.9 J/cm²
@# of Cycles 2.00 ,
Temperature -73.3 °C		185 ft-lb/in²
@# of Cycles 2.00 ,
Temperature -100 °F		Transverse
 50.6 J/cm²
@# of Cycles 1.00 ,
Temperature -101 °C		241 ft-lb/in²
@# of Cycles 1.00 ,
Temperature -150 °F		Transverse
 54.4 J/cm²
@# of Cycles 1.00 ,
Temperature -73.3 °C		259 ft-lb/in²
@# of Cycles 1.00 ,
Temperature -100 °F		Transverse
 69.3 J/cm²
@# of Cycles 1.00 ,
Temperature -30.0 °C		330 ft-lb/in²
@# of Cycles 1.00 ,
Temperature -22.0 °F		Transverse
 77.5 J/cm²
@# of Cycles 1.00 ,
Temperature -17.8 °C		369 ft-lb/in²
@# of Cycles 1.00 ,
Temperature 0.000 °F		Transverse
 81.6 J/cm²
@# of Cycles 2.00 ,
Temperature -30.0 °C		388 ft-lb/in²
@# of Cycles 2.00 ,
Temperature -22.0 °F		Transverse
 83.9 J/cm²
@# of Cycles 1.00 ,
Temperature 22.8 °C		399 ft-lb/in²
@# of Cycles 1.00 ,
Temperature 73.0 °F		Transverse
 85.8 J/cm²
@# of Cycles 2.00 ,
Temperature -73.3 °C		408 ft-lb/in²
@# of Cycles 2.00 ,
Temperature -100 °F		Longitudinal
 89.5 J/cm²
@# of Cycles 2.00 ,
Temperature -17.8 °C		426 ft-lb/in²
@# of Cycles 2.00 ,
Temperature 0.000 °F		Transverse
 105.1 J/cm²
@# of Cycles 2.00 ,
Temperature 22.8 °C		500.2 ft-lb/in²
@# of Cycles 2.00 ,
Temperature 73.0 °F		Transverse
 111.1 J/cm²
@# of Cycles 1.00 ,
Temperature -101 °C		528.8 ft-lb/in²
@# of Cycles 1.00 ,
Temperature -150 °F		Longitudinal
 138.3 J/cm²
@# of Cycles 1.00 ,
Temperature -73.3 °C		658.2 ft-lb/in²
@# of Cycles 1.00 ,
Temperature -100 °F		Longitudinal
 144.9 J/cm²
@# of Cycles 2.00 ,
Temperature -30.0 °C		689.6 ft-lb/in²
@# of Cycles 2.00 ,
Temperature -22.0 °F		Longitudinal
 159.2 J/cm²
@# of Cycles 2.00 ,
Temperature -17.8 °C		757.7 ft-lb/in²
@# of Cycles 2.00 ,
Temperature 0.000 °F		Longitudinal
 169.8 J/cm²
@# of Cycles 1.00 ,
Temperature -30.0 °C		808.1 ft-lb/in²
@# of Cycles 1.00 ,
Temperature -22.0 °F		Longitudinal
 184.7 J/cm²
@# of Cycles 1.00 ,
Temperature -17.8 °C		879.0 ft-lb/in²
@# of Cycles 1.00 ,
Temperature 0.000 °F		Longitudinal
 271.9 J/cm²
@# of Cycles 2.00 ,
Temperature 22.8 °C		1294 ft-lb/in²
@# of Cycles 2.00 ,
Temperature 73.0 °F		Longitudinal
 293.8 J/cm²
@# of Cycles 1.00 ,
Temperature 22.8 °C		1398 ft-lb/in²
@# of Cycles 1.00 ,
Temperature 73.0 °F		Longitudinal
 
Thermal PropertiesMetricEnglishComments
CTE, linear  12.7 µm/m-°C
@Temperature 79.4 °C		7.04 µin/in-°F
@Temperature 175 °F
 13.1 µm/m-°C
@Temperature 135 °C		7.30 µin/in-°F
@Temperature 275 °F
 13.4 µm/m-°C
@Temperature 191 °C		7.46 µin/in-°F
@Temperature 375 °F
 13.7 µm/m-°C
@Temperature 246 °C		7.59 µin/in-°F
@Temperature 475 °F
 13.9 µm/m-°C
@Temperature 302 °C		7.72 µin/in-°F
@Temperature 575 °F
 14.1 µm/m-°C
@Temperature 357 °C		7.83 µin/in-°F
@Temperature 675 °F
 14.3 µm/m-°C
@Temperature 413 °C		7.93 µin/in-°F
@Temperature 775 °F
 14.4 µm/m-°C
@Temperature 468 °C		8.02 µin/in-°F
@Temperature 875 °F
 14.5 µm/m-°C
@Temperature 524 °C		8.08 µin/in-°F
@Temperature 975 °F
 14.7 µm/m-°C
@Temperature 579.4 °C		8.18 µin/in-°F
@Temperature 1075 °F
 14.9 µm/m-°C
@Temperature 635.0 °C		8.29 µin/in-°F
@Temperature 1175 °F
 15.0 µm/m-°C
@Temperature 655.94 °C		8.36 µin/in-°F
@Temperature 1212.7 °F
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 0.20 %0.20 %
Chromium, Cr 20 %20 %
Copper, Cu 0.30 %0.30 %
Iron, Fe 72.6 %72.6 %As Balance
Manganese, Mn 5.0 %5.0 %
Nickel, Ni 1.6 %1.6 %
Nitrogen, N 0.13 %0.13 %
Silicon, Si 0.40 %0.40 %
 
Descriptive Properties
Chloride Stress Cracking Resistance (hrs)720No failure
Cyclic Oxidation Resistance (mg/in221.91600°F, Total of 958 Cycles
 26.61800°F, Total of 670 Cycles
'n' Value0.164.0% Cold Work
 0.170% Cold Work
 0.19Strain Hardening Coefficient, Typical, (Gauge, 0.028" -0.084")
Olsen Cup Height0.330"-0.450"Typical, (Gauge, 0.028" -0.084")

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 view all the property values for this datasheet as they were originally entered into MatWeb.

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NAKS140 / 138555




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