News
Credibility ,Yaang Stainless inventory now includes Alloy 309/309S (UNS S30900/S30908) in Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe,etc.
Overview
Alloys 309 and 309S are austenitic chromium-nickel stainless steels that are often used for higher temperature applications. Due to their high chromium and nickel content, Alloys 309 and 309S are highly corrosion resistant, have outstanding resistance to oxidation, and excellent heat resistance while providing good strength at room and elevated temperatures. The only significant difference between 309 and 309S is the carbon content. Alloy 309S has a much less carbon composition which minimizes carbide precipitation and improves weldability.
Specifications: UNS S30900/S30908
Alloys 309 and 309S are used exclusively for their high temperature oxidation resistance, excellent high temperature strength, along with their resistance to creep deformation and environmental attack. Some examples include, but are not limited to:
Resistance
Processing
Properties
C | Mn | Si | P | S | Cr | Ni | Fe | |
---|---|---|---|---|---|---|---|---|
309 | max: 0.20 | 2.0 max | 0.75 max | 0.045 max | 0.03 max | min: 22.0 max: 24.0 | min: 12.0 max: 15.0 | Balance |
309H | min: 0.04 max: 0.10 | 2.0 max | 0.75 max | 0.045 max | 0.03 max | min: 22.0 max: 24.0 | min: 12.0 max: 15.0 | Balance |
Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX |
---|---|---|---|---|
309/H | 40 | 30 | 40 | 217 |
Density lbm/in3 |
Thermal Conductivity (BTU/h ft. °F) |
Electrical Resistivity (in x 10-6) |
Modulus of Elasticity (psi x 106 |
Coefficient of Thermal Expansion (in/in)/ °F x 10-6 |
Specific Heat (BTU/lb/ °F) |
Melting Range (°F) |
---|---|---|---|---|---|---|
at 68°F: 0.285 | 9.0 at 32- 212°F | 30.7 at 68°F | 28.5 | 8.28 at 32 – 212°F | 0.1200 at 68°F to 212°F | 2500-2590 |
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Yaang Pipe Industry Co., Ltd. is an international supplier of piping solutions for flange, butt welding fittings, socket welding fittings and threaded fittings. Our products are widely used in different industrial fields, including oil and gas, chemical industry, petrochemical industry, power plant, pulp and paper industry, environmental and water conservancy engineering, engineering projects, etc.