Nitronic 33 Wire | UNS S24000

Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated
ASTM A-240 (XM-29), ASTM A-276 (XM-29), ASTM A-313 (XM-29), ASTM A-358 (XM-29), ASTM A-479 (XM-29), ASTM A-580 (XM-29), ASTM A-688 (XM-29)

Nitronic® 33 Alloy Description

Nitronic® 33 is a nitrogen-strengthened austenitic stainless steel having an annealed yield strength twice that of alloy 304. Better resistance to stress corrosion cracking than alloy 304. It retains low magnetic permeability at cryogenic temperatures even after severe cold working. Superior wear and galling resistance when compared to the standard austenitic steels.

Applications

Screens where good wear or abrasion is required
Cryogenic components
Wear plates
Heat exchangers where the stress corrosion cracking resistance of alloy 304 is insufficient
Electrical components where high strength and low magnetic permeability is required.

Chemistry Typical

Carbon: 0.08 max
Manganese: 11.50-14.50
Silicon: 1.00 max
Chromium: 17.00-19.00
Nickel: 2.25-3.75
Phosphorus: 0.060 max
Sulfur: 0.030 max
Nitrogen: 0.20-0.40

Physical Properties

Density: 0.280 lb/in³, 7.755 g/cm3

Electrical Resistivity: microhms-cm

At 77°F (25°C): 74.0
At 212°F (100°C): 80.0
At 392°F (200°C): 87.0
At 752°F (400°C): 100.0
At 1110°F (600°C): 110.0
At 1470°F (800°C): 119.0

Thermal Conductivity: BTU-in/hr-ft²-°F (W/m•K):

At 212°F (100°C): 110 (15.9)
At 392°F (200°C): 120 (17.3)
At 572°F (300°C): 131 (18.9)
At 752°F (400°C): 142 (20.4)
At 932°F (500°C): 153 (22.0)
At 1100°F (600°C): 162 (23.4)
At 1290°F (700°C): 171 (24.7)
At 1470°F (800°C): 181 (26.1)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C)
77- 199°F (25-93°C): 8.89 (16.0)
77- 400°F (25-205°C): 9.22 (16.6)
77- 599°F (25-315°C): 9.72 (17.5)
77- 797°F (25-425°C): 10.1 (18.2)
77- 1000°F (25-540°C): 10.4 (18.7)
77- 1200°F (25-650°C): 10.8 (19.4)
77- 1400°F (25-760°C): 11.2 (20.2)
77- 1600°F (25-870°C): 11.4 (20.5)

Modulus of Elasticity: KSI (MPa)
29.0 x 10³ (200 x 10³) in tension

Magnetic Permeability, H = 500: Annealed: 1.0014

Mechanical Properties at Room Temperature

Properties: Annealed Typical
Ultimate Tensile Strength: 115 KSI (793 MPa)
Yield Strength: 68 KSI (469 MPa)
Elongation: 50%
Hardness: Rb 95

Properties: Tempered Typical
10% Cold Work
Ultimate Tensile Strength: 133 KSI (917 MPa)
Yield Strength: 105 KSI (724 MPa)
Elongation: 32%
Hardness: Rc 30

20% Cold Work
Ultimate Tensile Strength: 160 KSI (1103 MPa)
Yield Strength: 140 KSI (965 MPa)
Elongation: 18%
Hardness: Rc 37

30% Cold Work
Ultimate Tensile Strength: 184 KSI (1269 MPa)
Yield Strength: 167 KSI (1152 MPa)
Elongation: 10%
Hardness: Rc 41

40% Cold Work
Ultimate Tensile Strength: 200 KSI (1379 MPa)
Yield Strength: 181 KSI (1248 MPa)
Elongation: 7.5%
Hardness: Rc 42

50% Cold Work
Ultimate Tensile Strength: 210 KSI (1448 MPa)
Yield Strength: 191 KSI (1317 MPa)
Elongation: 6.5%
Hardness: Rc 44

60% Cold Work
Ultimate Tensile Strength: 222 KSI (1530 MPa)
Yield Strength: 199 KSI (1372 MPa)
Elongation: 5%
Hardness: Rc 45

Properties: Tempered
Nitronic® 33 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements. Contact Ulbrich Wire for details.

Additional Properties

Corrosion Resistance
Refer to NACE (National Association of Corrosion Engineers) for recommendations.

Standard Wire Finishes
Extra Clean: (XC) 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.

Forms
Continuous Coils
Cut to lengths
Precision cutting

Heat Treatment
Nitronic® 33 is non hardenable by heat treatment.

Welding
For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”.

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.