309

UNS #S30900

309 stainless in an austenitic chromium-nickel modification of 304 stainless with superior heat-resisting characteristics. It offers slightly better corrosion resistance than 304 because of the higher percentages of both chromium and nickel and possesses better creep strength than the straight chrome grades. 309 stainless possesses resistance to oxidation up to 2000°F (1093°C) in continuous services

Type Analysis

  • Carbon (Maximum) 0.2
  • Phosphorus (Maximum) 0.045
  • Silicon (Maximum) 1
  • Nickel (Nominal) 12.00-15.00
  • Manganese (Maximum) 2
  • Sulfur (Maximum) 0.03
  • Chromium (Nominal) 22.00-24.00
  • Iron (Nominal) Balance

Applications

furnace parts, fire box sheets, high temperature containers, and weld wire.

Applicable Specifications

  • ASME SA479
  • ASTM A314
  • ASTM A580
  • ASTM A276
  • ASTM A479
  • QQ-S-763

Billet

Rod

Rounds

Strip

Wire

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