Austenitic stainless steel
As a premier stockholder, manufacturer and supplier of flanges, pipe, pipe fittings and fasteners to the oil, gas and petrochemical industries, Arc Alloys products are built to meet the precise specifications of the applications in which they are used, which is why we offer a truly comprehensive range of austenitic stainless steel options including 304H, 304/L, 316/L, 317L, and Nitronic 60.
The 300 series
The 300 range is the most recognised grade across the industry, due to its low carbon content and high chromium, manganese and nickel content, which enable them to stand up to harsh chemical environments and a wide range of temperature variants without losing their structural austenitic properties. But, while they may all be grouped within the same class, 304H, 304/L, 316/L and 317L, all offer different properties, which can provide a variety of benefits in different applications.
304H and 304/L
As a result of its workability and welding properties, 304 has become the industry standard for many products, offering a high level of corrosion resistance and strength at a low weight and without risk of product contamination. 304H and 304/L are variants of this alloy providing specific properties for particular applications.
With a higher carbon content, 304H is popular material for environments where high temperature resistance is required. As it requires no post-welding annealing while still providing a high level of corrosion resistance and durability 304H is often the material of choice in the production of heavier gauge components.
Where welding and moulding is required 304/L provides the ideal material as a result of its formability and strength, while its high level of resistance to intergranular corrosion makes 304/L a viable option for many applications such as chemical processing and storage.
The standard molybdenum-bearing grade 316 is known for providing improved crevice corrosion and pitting resistance as well as impressive welding and workability properties, and with its lower carbon content the 316/L version offers several benefits.
With a high level of immunity to intergranular corrosion, 316/L is the ideal material for heavy gauge components in high temperature environments, where welding is required without the need for annealing, such as chemical processing and heat exchangers.
However, 316/L is only recommended for environments where such carbide precipitation is unavoidable.
With a low carbon content, ensuring higher resistance to sensitisation, welding and high temperatures, combined with a high tensile and creep, stress-to-rupture strength. 317L is ideal for harsh environments where chemical attack and corrosion are elevated.
317L has a high level of sulfide resistance, and as a result, the use of 317L has increased significantly in recent years in applications such as petro-chemical processing.
The ideal solution for environments were galling and wear resistance are a priority, Nitronic 60 outstrips both 304 and 316 in this area, making Nitronic 60 a low cost, durable and effective material for applications such as valve stems and rings and bushings for the gas, oil and petro-chemical industries.
Nitronic 60 provides high galling, temperature, cavitation, Chloride pitting, high temperature oxidation and low temperature impact resistance, combined with high strength to make Nitronic 60 a viable choice for a multitude of applications.