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hot sale 309S round head square neck bolt Chemical Composition

Alloy 309/309S (UNS S30900/S30908) Austenitic stainless steels are typically used in high temperature applications. Its high chromium and nickel content provides comparable corrosion resistance to ordinary austenitic alloy 304, excellent oxidation resistance and a greater percentage of room temperature strength retention.

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Alloy 309/309S is an austenitic heat resistant stainless steel. About 23% Chromium Alloy 309/309S is 5% higher than 304 stainless steel in general corrosion resistance at elevated temperatures, giving it an advantage over 304 stainless steel.

Alloy 309 and Alloy 309S are austenitic chromium-nickel stainless steels typically used in higher temperature applications. Due to their high chromium and nickel content, alloys 309 and 309S are highly resistant to corrosion, exhibit excellent resistance to oxidation and excellent heat resistance, while providing good strength at room and elevated temperatures.

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