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Stainless Steel 309S

Ferrobend is a renowned supplier of Stainless Steel 309S, delivering high-quality solutions for industries demanding exceptional performance and durability. Stainless Steel 309S, an austenitic alloy, is well-regarded for its high chromium and nickel content, which ensures excellent resistance to oxidation and high-temperature corrosion, making it perfect for challenging environments such as petrochemical, power generation, and thermal processing.

Our Stainless Steel 309S products are manufactured with precision and adhere to stringent quality standards, meeting the most demanding industrial requirements. These products are versatile and can be easily fabricated into various components, including heat exchangers, furnace parts, and combustion chambers. Their superb weldability and resistance to cyclic heating and cooling ensure reliable performance in extreme conditions.

Ferrobend's Stainless Steel 309S is available in a wide range of sizes and thicknesses, allowing you to select the ideal product for your specific project needs. Each item undergoes rigorous quality control to guarantee uniformity, strength, and a flawless surface finish, providing you with a high-performance material that withstands the test of time.

As your trusted partner, Ferrobend is committed to delivering cost-effective solutions with prompt and reliable service. We offer competitive pricing, quick delivery, and exceptional customer support to ensure your projects proceed smoothly from start to finish.
Choose Stainless Steel 309S from Ferrobend for unmatched reliability and performance in high-temperature applications. With our dedication to quality, reliability, and customer satisfaction, you can trust that your projects are built to last.

Chemical Properties:

Elements Cr Ni C Si Mn P S Mo Fe
% min: 17.0 ,max:19.0 min: 8.0 ,max: 10.0 0.15 max 1.00 max 2.0 max 0.20 max 0.15 min 0.75 balance

Mechanical Properties:

Tensile Strength ksi (min.) Yield Strength 0.2% Offset ksi (min.) Elongation - % in 50 mm (min.) Hardness (Brinell) MAX Hardness (Rockwell B) MAX
75 30 35 228 -

Physical Properties:

Denstiy lbm/in3 Coefficient of Thermal Expansion (min/in)-°F Electrical Resistivity mW-in Thermal Conductivity BTU/hr-ft-°F Melting Range
at 68 °F at 68 – 212°F at 68 – 932°F at 68 – 1450°F at 68°F at 212°F at 392°F at 752°F at 1112°F at 1472°F at 68 – 212°F -
0.29 9.2 10.4 10.9 28.3 30.7 33.8 39.4 43.7 47.6 113.2 2552°F

Equivalent Grades and Designations:

SAE / AISI 303
UNS S30300
EN Material Number 1.4305
EN Material Name X8CrNiS18-9
DIN Material Name X8CrNiS18-9
JIS SUS 303
BS 202S 21 En58M

Heat Resistance:

  • Good oxidation resistance at temperatures up to 1700oF (927 oC)
  • Continuous use at temperatures above 1400oF (760oC) is not usually recommended due to carbide precipitation which can lead to irregular scaling
  • Does not have a low carbon content so it is also vulnerable to sensitization

Welding Characteristics:

  • Not generally recommended, but may be welded with some difficulty
  • May be welded with Alloy 310 electrodes
  • Should be annealed after welding to re-dissolve precipitated carbides

Machinability:

  • High machining rates can be obtained in the annealed condition with hardness in the range of 200 to 240 Brinell
  • Will work harden; therefore, it should be machined at reduced surface feet per minute and heavier feeds to prevent glazing at the tool interface.

Applications:

  • Nuts and bolts
  • Aircraft fittings
  • Gears
  • Screws
  • Shafts
  • Electrical switchgear components
  • Bushings