Overview
Stainless Steel 309 Pipes and Tubes is high alloy steel has excellent corrosion resistance. These are suitable to use in high temperatures and elevated temperatures due to its heat resistant properties. It is an austenitic chromium-nickel, serves excellent oxidation resistance. It has many characters like corrosion resistance, creeps resistance, high-temperature resistivity, etc.
Stainless Steel 309 Seamless Pipes and Tubes are commonly utilized for a wide range of applications like heating components, auto exhaust components, boiler baffles, heat exchangers, refinery, and also chemical processing in marine industries, desalination plant, fertilizer plant, etc.
Specification
ASTM A312/A312M-21 Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes.
| Specifications | ASTM A312 / SA312 TP309 |
| Dimensions | ASTM, ASME and API |
| Size | 1/8″NB TO 30″NB IN |
| Form | Seamless / Welded / ERW / EFW |
| Seamless 309 Pipes | 1/2"NB – 16"NB |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
| Type | ASTM A312 TP309 Seamless Pipes |
| Specialized in | Large Diameter Size |
| Length | Single Random, Double Random & Cut Length. |
| Form | Round, Square, Rectangular, Hydraulic Etc |
| End | Plain End, Beveled End, Treaded |
Stainless Steel ASTM A312 TP309 Equivalent Grades
| STANDARD | UNS | WERKSTOFF NR. |
| SS 309 | S30900 | 1.4828 |
Chemical Composition
| Grade | C | Ni | Si | S | Mn | P | Cr | Mo | |
SS 309 | min. | – | 12.0 | – | – | – | – | 22.0 | – |
| max. | 0.20 | 15.0 | 0.75 | 0.03 | 2.0 | 0.045 | 24.0 | ||
Mechanical Properties
Grade | Tensile Strength | Elongation | Yield Strength | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| SS 309 | 515 | 40 | 205 | 85 | 147 |
Physical Properties
| Density | Specific Heat | Modulus of Elasticity |
| 0.285 lbs/in3 7.89 g/cm3 | 0.12 BTU/lb-°F (32 – 212°F) 502 J/kg-°K (0 – 100°C) | 28.5 x 106 psi 193 GPa |
Applications
1. Furnaces — burners, doors, fans, piping and recuperators.
2. Fluidized Bed Furnaces — grids, piping, wind boxes.
3. Paper Mill Equipment.
4. Petroleum Refining — catalytic recovery systems, recuperators.
5. Power Generation — pulverized coal burners, tube hangers.
6. Thermal Processing — annealing covers and boxes, burners grids, doors, fans, lead pans and neutral salt pots, muffles and retorts, recuperators, walking beams;
7. Waste Treatment — incinerators, rotary kilns and calciners.
