347 Stainless Steel Round Bars

JN ALLOY supplies 347 Bars, 347 Rods,UNS S34700 Bars Rods, 1.4550 347 Solid Bars, ASTM A276 UNS S34700 Bars, ASTM A479 347 Stainless Steel Bars Supplier.

Alloy 347 (UNS S34700) is columbium stabilized austenitic stainless steel plate with good general corrosion resistance and somewhat better resistance in strong oxidizing conditions than 321 (UNS S32100). It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The alloy has good oxidation resistance and creep strength to 1500°F (816°C). It also possesses good low temperature toughness. Stainless Steel S34700 Round Bars offers excellent resistance and also has durability. These Round Bars are used in power generation, engine, welded fabrications and other elevated heat applications. Stainless Steel 347 Round Bars does not rust because it is sufficiently reactive, which make it able to protect by forming a passive corrosion product layer. It has other metals such as titanium and aluminum, which enhance resistance. The impact resistance behaviour of this alloy makes it well suited for use in cryogenic settings. Therefore, the DIN 1.4550 square bar may be used in the production of equipment that is a part of cryogenic environments. Typically carbon steels or alloy steels experience failure under such circumstances unlike the AISI 347 threaded bar, which can make quick connections. Other properties of the ss 347 bright bar include resistance to scaling, resistance to corrosion in aqueous media as well as good phase stability.

Corrosion Resistance
347 stainless steel round bars stands out for its excellent corrosion resistance, comparable to Type 302. The addition of niobium and tantalum prevents the formation of chromium carbides at the grain boundaries, ensuring the alloy remains resistant to intergranular corrosion, even after exposure to high temperatures. This makes it suitable for harsh environments where other materials might fail.

High-Temperature Resistance
347 stainless steel round bars excels in high-temperature applications. It offers exceptional resistance to oxidation and scaling, even in environments with heating cycles between 800°F and 1650°F (427°C to 899°C). This makes it an ideal choice for components exposed to extreme heat, such as those found in power generation, aerospace, and petrochemical industries.

High Strength
These round bars possess good strength and hardness, allowing them to bear substantial mechanical loads. In structural applications, especially those in high - temperature or corrosive environments, 347 stainless steel round bars can be used to ensure the long - term stability and safety of structures. Their strength - to - weight ratio makes them a favorable choice when both strength and weight considerations are important.

Processability and Weldability
347 stainless steel round bars are highly processable. They can be easily shaped using common metal - working techniques such as turning, drilling, and milling. Regarding welding, gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) are suitable methods. However, proper precautions need to be taken to ensure the integrity of the welded joints. Using appropriate filler materials that match the chemical composition of the base metal is crucial to maintain the high - temperature and corrosion - resistant properties of the welded components. The following table shows some key performance parameters of 347 stainless steel bar:
 

The production of 347 stainless steel round bars starts with the procurement of high - quality raw materials. The purity and quality of alloying elements like iron, chromium, nickel, and niobium significantly impact the final product's performance. Manufacturers are strict in raw material selection to ensure they meet the required standards. The raw materials are melted in an electric arc furnace, where precise control of temperature and time is essential to ensure the uniform mixing of alloying elements. Subsequently, refining processes are carried out to remove impurities and gases, enhancing the material's purity. The refined molten steel is then transferred to a ladle furnace for further composition adjustment. After that, hot rolling is performed. During hot rolling, the steel billet is formed into the desired shape and size, improving dimensional accuracy and surface quality. After hot rolling, the surface of the 347 stainless steel bar may develop scale and oxide layers, which are removed through pickling. Cold rolling follows pickling to further enhance dimensional accuracy and surface finish. Since cold rolling can cause work hardening, annealing treatment is necessary to relieve stress and improve the material's plasticity and toughness. Depending on customer requirements, 347 stainless steel bars can be surface - treated, such as polishing or passivating, to enhance appearance and corrosion resistance. Finally, various testing methods, including chemical composition analysis, mechanical property testing, and metallographic inspection, are used to ensure the product meets the relevant standards.

Performance in Cryogenic Environments
347 stainless steel is well-suited for cryogenic environments because it remains tough and stable in extremely low temperatures. Its ability to retain mechanical properties such as tensile strength and elongation ensures dependable performance in critical applications. This makes it an ideal choice for cryogenic tanks, pipelines, and components used in industries like liquefied natural gas (LNG) transportation and storage.

Excellence in High-Temperature Applications
347 stainless steel stands out in high-temperature environments, providing exceptional performance where others fail. With the ability to withstand temperatures ranging from -10°C to 816°C, it is a trusted material for demanding applications such as:
Heat Exchangers: Essential in power plants and petrochemical refineries, where high-temperature fluids are processed.
Boiler Tubes and Superheaters: Used in power generation and industrial boilers to endure prolonged exposure to heat and corrosive gases.
Exhaust Systems: Found in automotive and aerospace industries, where components face extreme heat and corrosive exhaust gases.

Structural Components Across Industries
347 stainless steel's high mechanical strength and corrosion resistance make it indispensable in various industries.

Chemical and Petrochemical Industries
In these sectors, 347 stainless steel is crucial for tanks, reactors, and piping systems that endure corrosive chemicals and high temperatures. Its resistance to intergranular corrosion and high-temperature oxidation ensures long-term performance in environments where other materials might fail.

Aerospace Industry
The aerospace industry relies on 347 stainless steel round bars to handle extreme stress and high temperatures. It is used in the construction of:
Engine Components: Such as exhaust manifolds and turbine blades, which must perform under intense conditions.
Collector Rings: Used in aircraft engines to manage high-temperature exhaust gases efficiently.

Automotive Industry
In the automotive sector, 347 stainless steel round bars is a preferred material for:
Exhaust Manifolds: Offering durability and resistance to high-temperature exhaust gases.
Heat Exchangers: Critical for maintaining optimal thermal performance in various automotive systems.

Consumer Goods Manufacturing
Beyond industrial applications, 347 stainless steel round bars is a popular choice in consumer goods, particularly in kitchen equipment and appliances. Its corrosion resistance and aesthetic appeal make it ideal for:
Cookware: High-quality pots, pans, and utensils designed for durability.
Kitchen Appliances: Such as ovens and refrigerators, where hygiene and longevity are essential.

Importance in Industrial Machinery
In industrial machinery, 347 stainless steel's ability to perform under high-stress and high-temperature conditions is invaluable. It is frequently used in:
Chemical Processing Equipment: Designed to resist corrosive substances.
High-Temperature Equipment: Such as furnaces and heat treatment apparatuses, ensuring stability and reliability over time.
Overall, 347 stainless steel round bars ensures that industrial machinery operates reliably and efficiently under the most demanding conditions.

347 stainless steel round bars play a crucial role in various high - temperature and high - performance industrial applications. Their unique combination of properties, well - established production technology, and wide range of applications make them an essential material in modern industrial manufacturing. As industries continue to innovate and strive for higher performance, 347 stainless steel round bars are expected to find even more applications and contribute to the growth and development of these sectors.