204Cu Stainless Steel
UNS S20430
Description
204Cu is a chromium-magnesium austenitic stainless steel with an addition of 2-4% copper and nitrogen of 0.05-0.25%. 204Cu stainless steel has excellent fatigue strength, which makes it an ideal choice for applications that require high levels of stress tolerance or vibration resistance. Additionally, this alloy has a high melting point (1450 °C) which means it can withstand high temperatures without deforming or becoming. It is worth mentioning that 204Cu stainless steel has slightly magnetic after cold working, which offers advantages over other austenitic stainless in certain applications.
Chemical Component
| C | Mn | P | S | Si | Cr | Ni | N | Cu | Mo | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.15% max | 6.5-9.0% | 0.060% max | 0.030% max | 1.00% max | 15.50-17.50% | 1.50-3.50% | 0.05-0.25% | 2.00-4.00% | 1.00% max | Balance |
Basic Information
| Items | 204Cu Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A002 |
| Density | 0.282lb/in3, 7.81 g/cm3 |
| Electrical Resistivity, ohm-inch (microhms-m) | 30.039 (0.763) |
| Mean Specific Heat, BTU/lb-°F (J/g-°C) | At 73-212 °F (23-100 °C): 0.119 (.511) |
| Thermal Conductivity, BTU/hr/ft2/ft/°F (W/m·K) | At 122 °F (50 °C): 93.79 (13.52); At 212 °F (100 °C): 104.02 (14.99); At 392 °F (200 °C): 118.31 (17.00); At 572 °F (300 °C): 131.18 (18.91); At 752 °F (400 °C): 142.44 (20.53); At 932 °F (500 °C): 154.43 (22.26) |
| Mean Coefficient of Thermal Expansion, µin/in-°F(µm/m-°C) | 77-212 °F (25-100 °C): 9.50 (17.1); 77-302 °F (25-150 °C): 9.61 (17.3); 77-392 °F (25-200 °C): 9.77 (17.6); 77-482 °F (25-250 °C): 9.94 (17.9); 77-572 °F (25-300 °C): 10.05 (18.1); 77-662 °F (25-350 °C): 10.16 (18.3); 77-752 °F (25-400 °C): 10.33 (18.6); 77-842 °F (25-450 °C): 10.44 (18.8); 77-932 °F (25-500 °C): 10.55 (19.0); 77-1022 °F (25-550 °C): 10.66 (19.2); 77-1112 °F (25-600 °C): 10.77 (19.4); 77-1202 °F (25- 650 °C): 10.83 (19.5); 77-1292 °F (25-700 °C): 10.77 (19.4) |
| Modulus of Elasticity, KSI (MPa) | 29 x 103 (200 x 103) in tension |
| Magnetic Permeability, H= 200 Oersteds | Annealed: 1.02 max |
| Melting Range, ° F (°C) | 2552-2642 (1400-1450) |
Material Forms
Alfa Chemistry offers 204Cu stainless steel in a variety of forms, including Wire, Strip, Foil.
Mechanical Properties
| Conditions | Ultimate Tensile Strength | Yield Strength | Elongation | Reduction in Area | |
|---|---|---|---|---|---|
| Annealed | 92 KSI (635MPa) | 42 KSI (290 MPa) | 75% | 77% | |
| Tempered | 5% Cold Worked | 97 KSI (669MPa) | 63 KSI (435MPa) | 69% | 77% |
| 10% Cold Worked | 108 KSI (745 MPa) | 81 KSI (559 MPa) | 49% | 65% | |
| 20% Cold Worked | 123 KSI(849 MPa) | 104 KSI (718 MPa) | 34% | 54% | |
| 30% Cold Worked | 149 KSI (1026MPa) | 133 KSI (910 MPa) | 26% | 66% | |
| 40% Cold Worked | 160 KSI (1104 MPa) | 150 KSI (1035 MPa) | - | - | |
| 50% Cold Worked | 175 KSI (1208 MPa) | 170 KSI (1173 MPa) | 27% | 64% | |
| 60% Cold Worked | 208 KSI (1435MPa) | 176 KSI (1214 MPa) | 18% | 62% | |
Specifications
Wire, Strip and Foil: ASTM A313
Applications
204Cu Stainless Steel Wire
- Screen industry in the coal handling equipment to filter coal slurry.
- Hinge pins and baskets used in the tobacco industry.
- Components where higher strength, non-magnetic behavior and galling resistance over 304 or 304HQ is required.
204Cu Stainless Steel Strip and Foil
- Hinge pins and baskets use in the tobacco industry.
- Fasteners where higher strength, non-magnetic behaviour and galling resistance over 304 or 304HQ is required.
* 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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