ISO 9001:2015 Certified · CRISIL Rated · PED Certified · Trusted Global Exporter
309 Stainlesss Steel Manufacturer

AISI 309 Stainlesss Steel Supplier


Get Quote

SS309 · AISI 309 · SUS309 · INOX 309 · Stainlesss Steel 309 · UNS S30900 · WNR 1.4828

Stainless Steel 309 is an austenitic stainless steel developed for use in high temperature corrosion resistance applications.

Stainless Steel 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). Because of its high chromium and low nickel content, SS 309 can be utilized in sulfur containing atmospheres up to 1832°F (1000°C). The steel is not recommended for use in highly carburizing atmospheres since it exhibits only moderate resistance to carbon absorption. UNS S30900 Steel can be utilized in slightly oxidizing, nitriding, cementing and thermal cycling applications, albeit, the maximum service temperature must be reduced. When heated between 1202 – 1742°F (650 – 950°C) the alloy is subject to sigma phase precipitation. A solution annealing treatment at 2012 – 2102°F (1100 – 1150°C) will restore a degree of toughness. 309 Stainless Steel can be easily welded and processed by standard shop fabrication practices.

Industry Names: SS309, AISI 309, SUS309, INOX 309, Stainlesss Steel 309, 309 Steel, Steel 309.
Specifications: UNS S30900, AFNOR Z17CNS20-12, WNR/Din X15CrNiSi20-12, EN 1.4828, JIS SUH309, GOST 20KH20N14S2, EURONORM X15CrNiSi20-12, UNI X16CrNi23-14, GB 1Cr20Ni14Si2, PN H20N12S2, BSI 309S24, CSN 17251
Applications: Paper Mill Equipment, Petroleum Refining, Furnaces, Thermal Processing, Power Generation, Waste Treatment
Features: Resistance to high temperature corrosion

Siddhagiri Metals and Tubes is a well-known Supplier, Exporter, Manufacturer and Stockist of Stainless Steel 309. We supply EN 1.4828 Steel in forms such as Seamless Pipe ASTM A312, Seamless Tube ASTM A269, Welded Pipe ASTM 312, Welded Tube ASTM A269, Flanges ASTM A182, Fasteners, Pipe Fittings ASTM A403, Tube Fittings, Forged Fittings ASTM A182. We are an ISO Certified supplier with 25 years of experience in this field.


Siddhagiri Metals and Tubes is a recognized supplier of Stainless Steel 309. We have exported UNS S30900 Steel to 50 International clients.
Other Names: 309 Stainlesss Steel, 309 SS, Stainlesss Steel 309, 309, SS309, 309 Steel, 309 Stainless
Category: AISI 309, SUS309, INOX 309
Material: Stainlesss Steel
Brand: Siddhagiri Metals and Tubes
Manufacturer: Siddhagiri Metals and Tubes
Rating: 4.5/5 based on 55 customer reviews

309 SS Specifications and Standards

Grade North America France Germany Europe Japan Russia European Italy China Poland UK USA Czechia
SS 309 UNS S30900 AFNOR Z17CNS20-12 WNR/Din X15CrNiSi20-12 EN 1.4828 JIS SUH309 GOST 20KH20N14S2 EURONORM X15CrNiSi20-12 UNI X16CrNi23-14 GB 1Cr20Ni14Si2 PN H20N12S2 BSI 309S24 AISI 309 CSN 17251

Properties of AISI 309 Stainlesss Steel

  • Chemical Properties
    C Ni Mn P S Si Cr
    MIN - - - - - - -
    MAX 0.200 14.000 2.000 0.045 0.030 1.000 23.000
  • Mechanical Properties
    Yield Strength
    0.2% Proof
    (MPa)
    Tensile strength
    (MPa)
    Elongation
    (% in 50mm)
    Hardness
    (HRB)
    MIN 310 620 45.00  
    MAX       85
  • Physical Properties
    Density lb/in³ 0.285
    Melting Range °F 2650
    °C 1455

Forms of Stainlesss Steel 309

Get In Touch

We Cherish All Your Requirements