SS 309 Shield
Stainless 309s tube shields are made of 309s stainless steel and can be customized to fit perfectly straight sections
309 stainless steel plate offers exceptional heat and corrosion resistance, ideal for high-temperature environments like furnace parts and heat exchangers.
309, 309S and 309H stainless steel plate are chromium-nickel austenitic stainless steel grades that are commonly used in environments with elevated temperatures.
Due to their high chromium and nickel content, these grades of stainless steel plate are highly corrosive resistant and have outstanding resistance to oxidation as well as excellent heat resistance. This type of stainless steel also provides excellent strength at room and elevated temperatures. The main difference between 309 and 309S stainless steel lies in the carbon content. 309S contains much less carbon which minimizes carbide precipitation and improves weldability. 309H differs from 309 plate in the amount of carbon as well. 309H contains more carbon than 309, this results in an enhanced creep resistance.
309 stainless steel plate is a high-alloy austenitic stainless steel known for its exceptional resistance to oxidation and heat. Comprising higher levels of chromium (23%) and nickel (12%), it provides outstanding corrosion and heat resistance, making it suitable for high-temperature environments. 309 stainless steel plate is commonly used in applications such as furnace parts, heat exchangers, kiln liners, and other high-temperature industrial equipment. Its excellent strength and durability at elevated temperatures, along with good weldability and formability, make it an ideal choice for demanding industrial processes.
The following table shows the chemical composition of grade 309 stainless steel.
| Grade | C | Mn | Si | P | S | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|---|
| SS 309 | 0.20 max | 2.0 max | 0.75 max | 0.045 max | 0.030 max | 22.0 – 24.0 | 12.0 – 15.0 | Balance |
| SS 309S | 0.08 max | 2.0 max | 0.75 max | 0.045 max | 0.030 max | 22.0 – 24.0 | 12.0 -15.0 | Balance |
The physical properties of grade 309 stainless steel are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8 g/cm3 | 0.289lb/in3 |
| Melting point | 1455°C | 2650°F |
The following table outlines the mechanical properties of annealed grade 309 stainless steel.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 620 MPa | 89900 psi |
| Yield strength (@ strain 0.200%) | 310 MPa | 45000 psi |
| Izod impact | 120 - 165 J | 88.5 - 122 ft-lb |
| Shear modulus (typical for steel) | 77 GPa | 11200 ksi |
| Elastic modulus | 200 GPa | 29008 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 45% | 45% |
| Hardness, Brinell | 147 | 147 |
| Hardness, Rockwell B | 85 | 85 |
| Hardness, Vickers (converted from Rockwell B hardness) | 169 | 169 |
The thermal properties of grade 309 stainless steel are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 14.9 μm/m°C | 8.28 μin/in°F |
| Thermal conductivity (@ 0-100°C/32-212°F) | 15.6 W/mK | 108 BTU in/hr.ft².°F |
Other designations equivalent to grade 309 stainless steel are included in the following table.
| Standard 1 | Standard 2 | Standard 3 | Standard 4 |
|---|---|---|---|
| ASTM A167 | ASME SA249 | ASTM A314 | ASTM A580 |
| ASTM A249 | ASME SA312 | ASTM A358 | FED QQ-S-763 |
| ASTM A276 | ASME SA358 | ASTM A403 | FED QQ-S-766 |
| ASTM A473 | ASME SA403 | ASTM A409 | MIL-S-862 |
| ASTM A479 | ASME SA409 | ASTM A511 | SAE J405 (30309) |
| DIN 1.4828 | ASTM A312 | ASTM A554 | SAE 30309 |
The presence of nickel gives 304 stainless steel its corrosion resistance and makes it suitable for various general-purpose applications. 2. 309 Stainless Steel: Compared to 304, 309 stainless steel contains a higher percentage of chromium and nickel, typically around 23% chromium and 12% nickel.
Type 309 is employed for parts requiring both corrosion and heat resistance and oxidation resistance up to 2000 °F. Strength at elevated temperatures is similar to that of 18-8 Stainless Steels. This alloy posses excellent resistance to oxidation as well as high tensile and creep strengths at elevated temperatures.
Type 309S Stainless Steel is identical to Type 309 except for a lower carbon content that minimizes carbide precipitation and improves weldability.
Use 309L (including ER309LSi) when joining mild steel or low alloy steel to stainless steels, for joining dissimilar stainless steels such as 409 to itself or to 304L stainless, as well as for joining 309 base metal.
316 contains a minimum 2.0% molybdenum which makes it much more corrosion resistant than 304 however, as it is a more expensive element, generally makes 316 a more expensive grade of metal.
309 has a machinability rating of 43% relative to AISI B1112 steel. Room temperature forming is suggested. Weld with AWS E309-16 covered electrodes or ER309 bare wire. Some Rod Coil is stocked as 309E which is EN 1.4828.
| 309 | 309S | 309H |
|---|---|---|
| UNS S30900 | UNS S30908 | UNS S30909 |
| ASTM A240 | ASTM A240 | ASTM A240 |
| ASTM A480 | ASTM A480 | ASTM A480 |
| ASME SA240 | ASME SA240 | ASME SA240 |
| AMS 5523 | AMS 5523 | AMS 5523 |
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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