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Penn Stainless Blog

Stainless Steel – Recyclable & Sustainable

Recyclable and Sustainable Stainless Steel Since 1915 when stainless steel was first introduced, stainless steel has been selected for countless applications across a wide array of industries due to its excellent mechanical and corrosion properties.  Now, as more and more emphasis is placed on choosing materials that are sustainable, stainless steel is also gaining significant  Continue Reading →


Stainless Steel & Leed Certification

Stainless Steel and LEED Certification LEED is an internationally recognized green building certification system.  LEED certification promotes design and construction practices that increase profitability, while reducing the negative environmental impacts of buildings, and improving occupant health and well-being.[1]  LEED certification is obtained based on a point system, and includes many areas that are directly or  Continue Reading →


Differences between 316 and 316L Stainless Steel

The differences between a 316L and a 316 straight grade are two-fold both in chemistry and mechanical properties.  The L grade has a lower maximum carbon limit and the straight grade has increased mechanical properties.  If material is certified as straight grade, the carbon content would have to be at a level of 0.030% maximum  Continue Reading →


Duplex Usage in the Oil and Gas Industry

Introduction: Over the past few decades, corrosive conditions in the Oil and Gas Industry have steadily grown in severity. The offshore oil industry continually pushes oil exploration to greater depths, which leads to higher pressure conditions and harsher environments. In addition, advanced technologies have enabled higher total production from domestic reservoirs, which in turn has  Continue Reading →


Duplex Usage in the Pulp and Paper Industry

Overview: Carbon steels and standard austenitic grades of stainless steel were the dominant metals for many years in the pulp and paper industry. These materials still play a significant role, but duplex 2205 and other duplex stainless steels are increasingly used in the production of new equipment. The overriding reason for the focus on duplex  Continue Reading →


Duplex Usage in Desalination Plants

Introduction: Desalination Plants are known to be very severe environments due to the high chloride, high temperature conditionsi. In the past, austenitic stainless steels in the ASTM 300 series tended to be the material of choice in desalination plants. In cases in which even higher corrosion resistance has been needed, the typical material solution has  Continue Reading →


The History of Duplex Stainless Steel

Early Duplex Development: Duplex stainless steels, which combine many of the beneficial properties of ferritic and austenitic steels, were originally developed in the early 1930′s. The initial duplex grades provided good performance characteristics, but had limitations in the as-welded condition. The metallurgical processes at that time were not suitable for producing grades with the right  Continue Reading →


The History of Stainless Steel

Early Stainless Steel Development: The development of stainless steel occurred over about a 100 year time period, and was based on the accomplishments of numerous individuals. In 1821, Pierre Berthier, a French Metallurgist, discovered that iron-chromium alloys were resistant to some acids. He had the foresight to suggest their use for cutlery, but the resulting  Continue Reading →


Glossary of Stainless Steel Industry Terms

This post covers a number of popular and common industry terms used in stainless steel processing. A Active Steel surface has lost ability to resist corrosion under prevailing conditions. Age Hardening The Degeneration of steel that increases strength and decreases ductility, this follows rapid cooling or cold working. AISI The American Iron and Steel Institute.  Continue Reading →