Nitronic 33 Stainless Steel
UNS S24000
Description
Nitronic 33 also known as XM-29, is a nitrogen-strengthened austenitic stainless steel that combines high yields strength with excellent toughness and ductility. Its magnetic permeability remains very low after severe cold working and at cryogenic temperatures. The corrosion resistance of Nitronic 33 is superior to 409 stainless steel and it is markedly more resistant than 304 and 304L stainless steels to stress corrosion cracking in hot chloride solutions at lower stress levels. Like most stainless steels, Nitronic 33 is prone to pitting and crevice corrosion in seawater and other aggressive environments.
Chemical Component
| Cr | Ni | P | S | Si | C | Mn | N |
|---|---|---|---|---|---|---|---|
| 17.00-19.00% | 2.25-3.75% | 0.060% max | 0.030% max | 1.00% max | 0.08% max | 11.50-14.50% | 0.20-0.40% |
Basic Information
| Items | Nitronic 33 Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A030 |
| Density | 0.28 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 x 103 (200 x 103) in tension |
| Magnetic Permeability, H = 500 | Annealed: 1.0014 |
Material Forms
Alfa Chemistry offers Nitronic 33 stainless steel in a variety of forms, including Coil, Sheet, Strip, Ribbon, Wire.
Mechanical Properties
- Mechanical properties at room temperature properties: annealed typical
| Ultimate Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|
| 115 Ksi (793 MPa) | 68 Ksi (469 MPa) | 50% min | Rb 95 |
- Mechanical properties at room temperature properties: tempered typical
| Conditions | Ultimate Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|
| 10% Cold Work | 133 Ksi (917 MPa) | 105 Ksi (724 MPa) | 32% | Re 30 |
| 20% Cold Work | 160 Ksi (1103 MPa) | 140 Ksi (965 MPa) | 18% | Re 37 |
| 30% Cold Work | 184 Ksi (1269 MPa) | 167 Ksi (1152 MPa) | 10% | Re 41 |
| 40% Cold Work | 200 Ksi (1379 MPa) | 181 Ksi (1248 MPa) | 7.5% | Re 42 |
| 50% Cold Work | 210 Ksi (1448 MPa) | 191 Ksi (1317 MPa) | 6.5% | Re 44 |
| 60% Cold Work | 222 Ksi (1530 MPa) | 199 Ksi (1372 MPa) | 5% | Re 45 |
Additional Properties
Corrosion Resistance: Refer to NACE (National Association of Corrosion Engineers) for recommendations.
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".
Specifications
Coil, Sheet, Strip, Ribbon, Wire: ASTM A240 (XM-29), ASTM A276 (XM-29), ASTM A313 (XM-29), ASTM A358 (XM-29), ASTM A479 (XM-29), ASTM A580 (XM-29), ASTM A688 (XM-29)
Applications
- Cryogenic tanks valves, piping, flanges, structural supports.
- Abrasion/Wear Resistance screens, racks, and wear plates.
- Electrical (low magnetic permeability) conduit shielding, MRI scanner supports, fittings, underground transmission risers and pipe and electronic support members.
- Process equipment, heat exchangers, pressure vessels and piping.
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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