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F309H Slip On Flange is a high chromium nickel alloy stainless steel, also known as 309H stainless steel. It is composed of 20% chromium, 12% nickel, and small amounts of carbon, molybdenum, manganese and other elements.
F309H Threaded Flange has the characteristics of high temperature resistance, corrosion resistance, oxidation resistance, thermal stability, etc., and is widely used in metallurgy, chemical industry, electric power and other fields. In terms of high temperature resistance, F309H Blind Flange has excellent high temperature resistance. It can maintain good mechanical properties and corrosion resistance in high temperature environments of 700℃-900℃. This makes F309H widely used in high temperature environments, such as heat exchangers, high temperature reactors and other equipment.
ASTM A182 F309s Flange Chemical Compostion and Properties
| Element | 309 | 309H |
|---|---|---|
| Chromium | 22.0 min.-24.0 max. | 22.0 min.-24.0 max. |
| Nickel | 12.0 min.-15.0 max. | 12.0 min.-15.0 max. |
| Carbon | 0.20 | 0.04 min.-0.10 max. |
| Manganese | 2.00 | 2.00 |
| Phosphorus | 0.045 | 0.045 |
| Sulfer | 0.030 | 0.030 |
| Silicon | 0.75 | 0.75 |
| Iron | Balance | Balance |
ASTM A182 F309s Flange Mechanical and Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 620 MPa | 89900 psi |
| Tensile strength, yield (0.2%) | 310 MPa | 45000 psi |
| Izod impact | 120 - 165 J | 88.5 - 122 ft-lb |
| Modulus of elasticity | 200 GPa | 29000 ksi |
| Shear modulus | 77 GPa | 11200 ksi |
| Poissons ratio | 0.3 | 0.3 |
F309H Slip On Flange
In addition, F309H Reducing Flange also has good corrosion resistance. The chromium element in its main component can react with oxygen to form a dense chromium oxide protective layer, thereby enhancing its corrosion resistance. At the same time, the material also has good acid and alkali resistance and can be used in various corrosive media.
In addition, F309 flange also has good oxidation resistance. In high-temperature environments, its main components can react with oxygen to form a stable oxide layer to prevent materials from being oxidized and corroded. This makes ASTM A182 F309H flange have good oxidation resistance in high-temperature oxidizing environments, such as thermal power generation, petrochemical industry and other fields.
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