Four Tips For Choosing The Right Stainless Steel Supplier

Stainless steels are iron-based alloys containing at least 10.5% chromium content and 1.2% or less carbon. The addition of different metals and elements such as nickel, molybdenum, titanium, nitrogen, and copper in varying amounts alter the properties of this stainless steel. There are different grades of stainless steel on tap, which makes it applicable for varied purposes. One of the most valuable properties of stainless steel is its ability to resist corrosion. The chromium content results in forming a chromium oxide film on the steel surface when it faces exposure to oxygen which imparts its corrosion resistance qualities.

Stainless steel is cost-effective and exhibits sufficient mechanical strength for use in different industrial and commercial purposes. The blend of good tensile strength, corrosion resistance, and toughness make it an industry-relevant material. Moreover, it has a long life-cycle and fully recyclable. Stainless steel can be welded in various forms such as plates, bars, sheets, and tubing based on the end-use. 304 stainless steel tube is the most commonly used type in industrial applications and kitchen equipment.

While choosing the correct grade and form of stainless steel, you also need to select the right supplier. Here are few essential factors in choosing the best stainless steel supplier.

Determine What You Need

Before you initiate your lookout for the best supplier, you need to conduct some preliminary research. How do you intend to use the stainless steel, in what form, and in what environment? Is stainless steel the best suitable material for that purpose? It will help you to align your supplier sourcing strategy to your objectives and requirements.

Quality Management System (QMS)

Quality is one of the essential factors you need to consider while choosing the right vendor. Ensure that the product complies with the standard quality management requirements. You can review the manufacturing process to ascertain if the stainless steel meets performance standards and qualifies for industrial use. Enquire if they have a quality management system for efficient manufacturing and testing processes for stainless steel.

Expertise And Knowledge

Look for accountability of the vendor in this field. Ensure that they have the necessary training and certifications to manufacture stainless steel materials per global and ISO standards. Some other essential certifications include safety certifications and industry certifications. Look for manufacturers who have substantial experience and a reputation in the marketplace. You can also review their client base and approach them for feedback to get an idea about their services.

Fabrication Services

It would help if you asked your supplier about the different fabrication services they offer. Check if they can access superior bending and cutting equipment, like vertical cutter, band saw, bend press, and plasma cutter, to fabricate your stainless steel product accurately with the correct dimensions. Stainless steel is available in different forms, such as flat, sheet, plate, tube, hexagonal, and more. Suitable stainless steel suppliers allow you to purchase the metal in the exact form and dimensions based on your preferences without enduring any metal wastage.

To Conclude:

These are some essential factors you need to keep in mind while finding the right stainless steel supplier. The vendor should have the proper certifications, testing mechanisms, and fabrication processes in place to yield the right shape and quality for your stainless steel products.


Four Important Things You Should Know About Duplex Stainless Steel

Duplex stainless steels are iron, nickel, and chromium (Fe-Ni-Cr) alloys. They are a popular grade in the stainless-steel family, and consist of two-phases in their metallurgical structure, that is, both the austenite and ferrite in equal proportions. Hence, they get their name from the austenite-ferrite micro-structure. They are useful in applications that require good corrosion resistance and strength.

Alloy 2205 duplex pipe finds varied use in different industries. It is typically used in applications for chemical processing, transfer, and storage, and in those systems that are subject to high stresses in chloride-containing environment. These pipes help to transport oil and gas, and also forms a part of heat exchangers and hydraulic tubing systems. The conception of duplex stainless steel was wrought on in the early 1930s.Duplex stainless steels has a chromium content of 22%–25%, with the additional presence of molybdenum, tungsten, and nitrogen. The alloy of austenite-ferrite in its microstructure imparts it a favorable combination of the parent grades.

This article lists the important aspects of duplex stainless-steel pipes.

Stress Corrosion Cracking (Scc) Resistance

SCC is the growth of cracks due to the effect of static and tensile stress in reactive environments. As duplex stainless steel pipe have higher strength and better toughness than ferritic grades, it does not succumb to SCC. It possesses good mechanical properties and shows excellent resistance to corrosion. The higher resistance to SCC is because of its microstructure, which makes it more difficult for a crack in duplex systems.

Fabrication And Welding

Duplex alloys have low risks of hydrogen cracking, and are more resistant to solidification cracking as compared to austenitic grades. It shows easy welding and machining, enabling welding with relatively high heat input and low interpass temperatures. Welding duplex stainless steel is cheaper and easier, and one can use various welding methods like resistance welding, laser welding, and electron beam welding for forming the desired shape.

Different Forms of Duplex Stainless Steel

Based on the presence of different production methods, there can be four basic duplex forms. Lean Duplex has lower Nickel content, and does not contain molybdenum. It is mainly used in storage tank construction. 2205 duplex stainless steel is regular duplex possessing standard amounts of both nickel and molybdenum and finds wide use in pharmaceutical sector. Super Duplex has higher molybdenum and chromium (24-26%) content, and is used for constructing pipes for oil, gas, and chemical industries. Hyper Duplex contains even higher volumes of molybdenum and chromium (27-32%), and finds use in energy and oil sectors.

Cleaning Duplex Stainless Steel

Different fabrication and welding processes can damage duplex stainless steel pipes which can damage its structure. For protecting the steel surface against formation of rust and other impurities, one needs to clean the steel surface before and after welding. Electrochemical cleaning, manual grinding, chemical pickling are common methods for cleaning the surface and restoring the passivation layer that imparts anti-corrosive properties to the structure. It helps to take care of the common side-effects such as oxidation and heat tinting that occurs during the welding process.

To Conclude:

These are some of the important properties that characterize the duplex stainless steel grade. It is a highly valuable with enhanced properties such as improved weldability, good toughness, and corrosion resistance, which makes it a useful material in different industries.