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309s stainless steel plate Heat Resistnat Alloy 309/309S Stainless Steel Plate

Time: 2021-1-31 【Print】【Close】

Product Description:

Alloy 309 (UNS S30900) is an austenitic stainless steel developed for use in high temperature corrosion resistance applications. The alloy resists oxidation up to 1900°F (1038°C) under non-cyclic conditions. Frequent thermal cycling reduces oxidation resistance to approximately 1850°F (1010°C).

CORROSION RESISTANCE

Provide excellent corrosion resistance
More resistant to marine atmospheres than Alloy 304
Often used at higher temperatures to take advantage of their oxidation resistance
Have high resistance to sulfite liquors
Generally considered heat resistant alloys
Destructive scaling temperature is approximately 2000oF
Good scaling resistance with regard to continuous and intermittent service

HIGH TEMPERATURE CORROSION

Alloy 309 resists high temperature corrosion in most in-service conditions. Operating temperatures are as follows:
- Oxidizing conditions (max. sulfur content–2 g/m3)
  - 1922°F (1050°C) continuous service
  - 2012°F (1100°C) peak temperature
- Oxidizing conditions (max. sulfur greater than 2 g/m3)
  - 1742°F (950°C) maximum temperature
- Low oxygen atmosphere (max. sulfur content–2 g/m3)
  - 1832°F (1000°C) maximum temperature
- Nitriding or carburizing atmospheres
  - 1562–1742°F (850–950°C) maximum

The alloy does not perform as well as Alloy 600 (UNS N06600) or Alloy 800 (UNS N08800) in reducing, nitriding or carburizing atmospheres, but it does outperform most heat resistant stainless steels in these conditions.

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