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carbon or stabilized alloy should be used where the environment is 1500˚F range and a low carbon or stabilized alloy should be used where the environment is corrosive.

TYPE 314 : This alloy with 25% chromium, 20% nickel, and 2% silicon is extensively used for belts operating at temperatures up to 2100˚F(1149˚C). Its composition provides a high degree of oxidation resistance at high temperatures and good carburization resistance. Compared to most alloys capable of operating at very high temperatures, Type 314 is relatively inexpensive. For this reason, it very frequently produces an excellent cost-life ratio for belts used in copper brazing and sintering of powered metal parts. Type 314 is susceptible to carbide precipitation in the 800˚Fto 1500˚F(816˚C) temperature range and should not be subjected to a corrosive environment during or after operation in this temperature range.

TYPE 310 : Tish alloy is quite similar to Type314 except for a lower silicon content. It is used primarily where a relatively high chromium and nickel content is needed and the belt must withstand moist corrosion.

TYPE330 : Type 330 has proven to be an excellent all-purpose alloy for a wide variety of applications. With a midrange nickel content of 35%, it will operate under certain conditions destructive to a high nickel alloy, yet will operate satisfactorily under other conditions destructive to a low nickel alloy. The well-balanced chormiun, nickel and silicon contents provide excellent resistance to both oxidation and carburization. The addition of cloumbium as a means of stabilization makes it particularly useful for corrosive environments where the belt must be operated in the carbide precipitation range.

INCONEL 600 : With a nickel content of 72%, Inconel is representative of " high nickel alloys." Inconel 600 prossesses excellent oxidation resistane, carburization resistane, and nitriding resistance. It is widely used in copper brazing applications and in sintering of powdered metal parts.

INCONEL 601 : With a high chromium content (nominally 23%), Alloy 601 gives additional resistance to oxidizing, carburizing, and sulfur-containing environments. Oxidation resistance is further enhanced by the aluminum and nickel contents.


MATERIAL SELECTION One of the factors that makes a metal mesh belt particularly adaptable to such a wide variety of operating conditions is that it is available in so many different materials. From subzero to 2200˚F(1204˚C), whatever the corrosive may be, there is a material for aimost any application. Metal mesh belts may be woven of virtually all wrought alloys which can be drawn into wire form. Following is a general description of the more frequently used wire belt materials, a table with chemical analysis and maximum operating temperatures, and guidelines on alloy selection in the higher temperature ranges.
TYPE 430 : This steel is used frequently to obtain greater oxidation resistance at temperatures up to 1400˚F. The chromium content forms a tightly adherent oxide film which furnishes excellent oxidation resistance. TYPE 304 : Being an austenitic stainless steel, Type 304, with 18% chromium and 8% nickel, provides significantly grater creep strength, rupture strength, and oxidation resistance than Type 430. Type 304 is subject to carbide precipitation in the 800˚F(426˚C) to 1500˚F(816˚C) temperature range, which causes a loss of ductility normally presents no problem. However, where there is a corrosive environment present, the use of Type 304 L or one of the columbium stabilized grades such as Type 347 is suggested. TYPE 316 : This alloy, which is normally considered a corrosion-resisting alloy, also possesses excellent properties for use at elevated temperatures. It provides not only greater resistance to corrosive environments at elevated temperatures, but also is significantly stronger than Type 304. It is subject to carbide precipitation and where there is a corrosive environment present, the use of Type 316 L is suggested. TYPE 321 : Type 321 Stainless Steel is basically a titanium stabilized version of Type 304. It is primarily useful in non-welded belt constructions as the beneficial effects of the titanium additions are lost during the welding process. Where the belt must be welded, Type 347 is the normal choice. TYPE 347 : Type 347 is also basically a version of Type 304, except that stabilization is accomplished by the addition of columbium. When operated in the carbide precipitation range of 800˚F to 1500˚F, carbide precipitation occurs as columbium carbides, rather than chromium carbides, leaving the chromium in the metal and retaining full resistance to corrosion. Type 347 is suggested for use where the belt must be exposed to a corrosive environment during or after exposure to elevated temperatures. TYPE 309 : With a relatively high chromium content of 25%, this alloy provides good oxidation resistance up to 1700˚F(927˚C). Due to instability of the scale formed on this alloy under some conditions, its primary value is in applications where the environment is destructive to high nickel alloys. In these applications where sulphur, lead or zinc may be present, it is particularly useful by virtue of its high chromium content and low nickel content. It also is subject to carbide precipitation in the 800˚F(426˚C) to 1500˚F(816˚C) range and a low	carbon or stabilized alloy should be used where the environment is 1500˚F range and a low carbon or stabilized alloy should be used where the environment is corrosive. TYPE 314 : This alloy with 25% chromium, 20% nickel, and 2% silicon is extensively used for belts operating at temperatures up to 2100˚F(1149˚C). Its composition provides a high degree of oxidation resistance at high temperatures and good carburization resistance. Compared to most alloys capable of operating at very high temperatures, Type 314 is relatively inexpensive. For this reason, it very frequently produces an excellent cost-life ratio for belts used in copper brazing and sintering of powered metal parts. Type 314 is susceptible to carbide precipitation in the 800˚Fto 1500˚F(816˚C) temperature range and should not be subjected to a corrosive environment during or after operation in this temperature range. TYPE 310 : Tish alloy is quite similar to Type314 except for a lower silicon content. It is used primarily where a relatively high chromium and nickel content is needed and the belt must withstand moist corrosion. TYPE330 : Type 330 has proven to be an excellent all-purpose alloy for a wide variety of applications. With a midrange nickel content of 35%, it will operate under certain conditions destructive to a high nickel alloy, yet will operate satisfactorily under other conditions destructive to a low nickel alloy. The well-balanced chormiun, nickel and silicon contents provide excellent resistance to both oxidation and carburization. The addition of cloumbium as a means of stabilization makes it particularly useful for corrosive environments where the belt must be operated in the carbide precipitation range. INCONEL 600 : With a nickel content of 72%, Inconel is representative of " high nickel alloys." Inconel 600 prossesses excellent oxidation resistane, carburization resistane, and nitriding resistance. It is widely used in copper brazing applications and in sintering of powdered metal parts. INCONEL 601 : With a high chromium content (nominally 23%), Alloy 601 gives additional resistance to oxidizing, carburizing, and sulfur-containing environments. Oxidation resistance is further enhanced by the aluminum and nickel contents.
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