What Is 347 Stainless Steel Medium Thick Plate?
As its name suggests, 347 stainless steel medium thick plate is stainless steel plate of 4-25 mm in 347 grade. This stainless steel grade, renowned for its resistance to intergranular corrosion, proves ideal for deployment in high-temperature settings. Moreover, it exhibits outstanding heat resistance, maintaining its strength and integrity even when subjected to elevated temperatures.
347 Chemical Composition
| C | Si | Mn | P | S | Ni | Cr | Nb |
| 0.08 | 1.00 | 2.00 | 0.035 | 0.030 | 9~13 | 17.00~19.00 | 5*C% |
347 Stainless Steel Medium Thick Plate Specification Chart
| Standard | DIN, JIS, AISI, ASTM, GB, BS |
| Grade | 347 |
| Thickness | 4-25 mm |
| Width | 600 – 1500 mm |
| Length | 800 – 2000 mm |
| Techniques | hot rolled and cold rolled |
| Surface | 2B, 2D, BA, NO. 1, NO. 4, NO. 8, 8K, mirror, embossed, hair line, sandblast, polished, brushed, mill, etching, etc |
| Customization | Acceptable |
| Package | standard export seaworthy package |
347 Stainless Steel Medium Thick Plate Fabrication
The process of manufacturing and fabricating 347 stainless steel medium thick plates entails a series of crucial steps. They are usually manufactured by rolling process, including hot rolling and cold rolling.
Hot Rolling: alloy melting — refining — casting — hot rolling — heat treatment — forming
Cold Rolling: hot rolled 347 stainless steel medium thick plate — cold rolling — sizing — straightening — examining
347 Stainless Steel Medium Thick Plate Characteristics
The plate possesses exceptional properties that make it ideal for a variety of heavy applications. They include:
1. Excellent Resistance to Intercrystalline Corrosion
347 stainless steel is stabilized by the addition of columbium and tantalum, which provides excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C).
2. Mechanical Properties
| Property | 347 |
| Yield Strength, min. (ksi) | 30 |
| Tensile Strength, min. (ksi) | 75 |
| Elongation, min. (%) | 40 |
| Hardness, max. (Rb) | 92 |
3. Physical Properties
| Property | 347 |
| Density, lb/in3 | 0.288 |
| Modulus of Elasticity, psi | 28.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 9.3 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.2 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microohm-in | 28.4 |
4. Resistance to Creeping and Stress Rupturing
347 has higher creep and stress rupture properties than 304/304L, making it suitable for long-term work life in high temperatures.
5. Good Low-temperature Toughness
It also possesses good low-temperature toughness and is non-magnetic in the annealed condition.
6. Good Weldability
It has good machining performance and welding performance and can be machined easily.
Stainless Steel Medium Thick Plate Uses
347 stainless steel medium thick plate finds extensive applications in various industries due to its exceptional properties. Some of its key applications are:
1. Chemical Processing
It possesses the ability to endure the harsh chemical environments and elevated temperatures that are often encountered in this industry. As a result, it is an ideal choice for reactors, heat exchangers, and storage tanks, ensuring the longevity and reliability of such equipment.
2. High-Temperature Applications
347 stainless steel medium-thick plate exhibits remarkable heat resistance, rendering it suitable for many high-temperature applications. It is commonly used in power generation, aerospace, and furnace manufacturing. Its exceptional capability to retain strength and resist oxidation at elevated temperatures makes it a reliable and sought-after material for components like turbine blades, exhaust systems, and heat exchangers, ensuring the efficiency and durability of these crucial elements.
3. Oil and Gas Exploration
The oil and gas industry demands materials that can withstand corrosive environments, high pressures, and extreme temperatures. In this regard, 347 stainless steel medium thick plate emerges as a dependable choice, meeting the stringent requirements of this sector. It is extensively employed in offshore platforms, pipelines, valves, and other equipment where resistance to sulfide stress cracking and corrosion is of paramount importance.
4. Public Uses
It can also be used in construction engineering, machinery manufacturing, container manufacturing, shipbuilding, bridgebuilding, furnace shells, welding components, etc.
Final Words
In summary, 347 stainless steel medium thick plate is a stabilized alloy with excellent resistance to intergranular corrosion and is suitable for various industrial applications, especially in high-temperature environments. Gnee Steel offers 347 stainless steel medium-thickness plates available in a wide range of sizes, with thicknesses ranging from 0.188 to 4 inches. If you have the need, welcome to contact us for a free quote.