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Stainless Steel 304 aka 18-8 |
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| Principal Design Features | One of the most widely used and oldest of the stainless steels. This was originally called 18-8 which stood for its chromium and nickel content. It possesses an excellent combination of strength, corrosion resistance and fabricability. It is available in the widest variety of forms and sizes of any stainless steel. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Applications |
The list is endless. Almost every conceivable industry uses some of this material in some way. Everything from stovetops to ball point pen barrels to flatware to fasteners has been fabricated from this alloy.
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Machinability |
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Slow speeds and heavy feeds will minimize this alloys tendency to work harden. Due to long stringy chips, the use of chip breakers is advisable. Many companies now offer premium machinability grades, such as CarTech with their Project 70 and 7000 series.
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Forming |
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Welding |
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All fusion and resistance processes have been successfully employed in welding 304. AWS E/ER308 or 312 filler metal is recommended. For cleaner, stronger welds, may users choose 304L which has a controlled low carbon content designed to reduce carbide precipitation at the weld boundaries. |
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Heat Treatment |
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Forging |
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Hot Working |
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Forging, heading and other hot working should follow uniform heating to 2100-2300 F (1149-1260 C). Rapid cooling is necessary to attain maximum corrosion resistance in finished parts. |
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Cold Working |
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Readily fabricated by most cold working methods, 304 may require intermediate annealing to avoid cracking or tearing from radical deformation. Full annealing should follow any operation to reduce internal stress and optimize corrosion resistance. |
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Annealing |
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1850-2050 F (1010-1121 C) followed by rapid cooling. |
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Aging |
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Tempering |
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Not applicable. |
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Hardening |
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This alloy does not respond to heat treatment. Cold work will cause an increase in both hardness and strength. |
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Other Physical Props |
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Other Mechanical Props |
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Mechanical Data |
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There is no Mechnical data available for this grade. |
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Disclaimer |
This information is provided "as is" and TriMatic Machine Products,Inc. makes no warranty of any kind with respect to the subject matter or accuracy of the information contained herein. TMMPI specifically disclaims all warranties, expressed, implied or otherwise, including without limitation, all warranties of merchantability and fitness for a particular purpose. In no event shall TMMPI be liable for any special, incidental, indirect or consequential damages of any kind or any damages whatsoever resulting from loss of use, data, profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use of the information contained herein. This data may include technical inaccuracies or typographical errors. Changes may be periodically made to the information herein.
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Provided by AlloyTech, Inc. All Rights Reserved | ||||||||||||||||||||||||||||||||||||||||||