Shaped, Flat, Square, Round, Fine Wire, Plated and Bare Wire
AMS 5656, ASTM A276 (XM-10), ASTM A314 (XM10), ASTM A412 (XM-10), ASTM A473 (XM-10), ASTM A580 (XM-10), UNS S21904, AMS 5575. AMS 5656, ASTM A240 (XM-11), ASTM A276 (XM-11), ASTM A314 (XM-11), ASTM A412 (XM-11), ASTM A473 (XM-11), ASTM A479 (XM-11), ASTM A580 (XM11)
Nitronic®40 Alloy Description
Nitronic®40 is a versatile austenitic stainless steel that combines high yield strength with good corrosion resistance. Essentially non-magnetic at sun-zero temperatures or after severe cold working.
Screening applications requiring high strength and while remaining relatively non-magnetic
Aircraft engine components
Chemical process equipment
Pollution control equipment, ducting, and bellows.
Chemistry Typical for UNS 21900
Carbon: 0.08 max*
Silicon: 1.00 max
Phosphorus: 0.060 max
Sulfur: 0.030 max
Where Nitronic® 40 must meet CuSO4H2SO4 test as defined by Federal Test Methods
Standards 151b Method ASTM 393(A708) the use UNS 21904 with .040% max carbon
Density: 0.283 lb/in3, 7.83 g/cm³
Thermal Conductivity: BTU/hr/ft²/°F (W/m•K):
At -290°F (-179°C): 54 (7.8)
At -100°F (-73°C): 76 (10.9)
At 200°F (93°C): 96 (13.8)
At 400°F (204°C): 112 (16.1)
At 600°F (316°C): 126 (18.2)
At 800°F (427°C): 140 (20.2)
At 1000°F (538°C): 156 (22.5)
At 1200°F (649°C): 172 (24.8)
At 1400°F (760°C): 186 (26.8)
At 1600°F (871°C): 200 (28.8)
Magnetic Permeability, H = 200 Oersteds:
15% Cold Reduction: 1.003
35% Cold Reduction: 1.005
60% Cold Reduction: 1.012
Mechanical Properties at Room Temperature
Properties: Annealed Typical
Ultimate Tensile Strength: 112 KSI (772 MPa)
Yield Strength: 68 KSI (469 MPa)
Hardness: Rb 96
Nitronic® 40 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.
Refer to NACE (National Association of Corrosion Engineers) for recommendations.
Standard Wire Finishes
Extra Clean: Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”
Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications
Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation. A soap finish is available in tempered products.
Plated: Many plating options are available.
∗Special finishes are available: Contact Ulbrich Wire Sales with special finish and plating requests.
Cut to lengths
Nitronic® 40 is non hardenable by heat treatment.
For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”.
Nitronic® 40 is a registered Trademark of AK Steel.
Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels and Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the ‘applications’ noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.
Copyright© January 2014 Ulbrich Stainless Steels & Special Metals, Inc. – Revision 6.1.2015