Jun 9th 2020

What is austenitic stainless steel?

The most well-known grades of stainless steel are the austenitic stainless steel grades 304 and 316. An austenitic stainless steel is so-called because of the crystal structure the atoms take when the composition and thermal processing conditions allow. The austenite crystal structure is also described as face centred cubic (FCC) and defines many of the mechanical and physical properties of the stainless steel.

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Jun 1st 2020

What is Inconel?

Inconel is a family of high-performance nickel-based alloys developed by Special Metals Corporation. It is one of the most widely recognised trademarks in the industry, associated with the original development of 18 different alloys.

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May 29th 2020

What is galling?

Galling is when two metal surfaces join unintentionally, caused by micro-welding across their surfaces at localised points of contact. This phenomenon is influenced by the surface condition (roughness), type of metal, environment, temperature and load exerted on the surface. Galling typically refers to the damage that occurs when breaking the items apart, with a tearing […]

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May 26th 2020

What is Alloy 904L?

Alloy 904L is a more highly alloyed austenitic stainless steel, based upon 20% chromium and 25% nickel content. It was developed for use in applications containing dilute sulphuric acid. The substantial nickel content means that Alloy 904L is a lot more expensive than regular stainless steels. Therefore, it has seen some substitution from more cost-effective super duplex stainless steels (SDSS).

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May 22nd 2020

Should I choose Annealed, Hot Rolled or Strain Hardened Condition of Nitronic 50?

Nitronic 50 is a higher-performance austenitic stainless steel that provides approximately twice the yield strength of regular 3xx series stainless steels and improved corrosion performance. It is widely used in a variety of marine and industrial applications. This alloy is available in several conditions, Solution Annealed, Hot Rolled or Strain Hardened.

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May 21st 2020

What is duplex steel?

A duplex steel is one that has a mixture of two different metallurgical phases within its microstructure. Although many different grades of steel possess two or more different phases, the term duplex is used almost exclusively for a family of stainless steels that combine austenitic and ferritic phases.

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May 20th 2020

Properties of Inconel 625

Inconel 625 (Alloy 625, UNS N06625, 2.4856) is a nickel-based alloy that provides good levels of strength and excellent corrosion resistance at elevated temperatures. Its composition is predominantly nickel (58% min.), with additions of chromium, then lesser amounts of molybdenum, niobium, iron, tantalum, cobalt, and trace amounts of manganese, silicon, aluminium, and titanium. Inconel 625 […]

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May 15th 2020

Metals for Thermowells

A thermowell is a fitting designed to protect sensors when they are installed in aggressive environments in industrial applications. The thermowell will protect the sensor from impact, corrosion, oxidation, pressure and general damage. The most common designs of thermowell are sized to fit thermometers, thermocouples or resistance temperature detectors. The process fluid transfers heat to the […]

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May 12th 2020

High Strength Copper Alloys

Copper has many desirable physical properties, such as excellent thermal and electrical conductivity, plus strong corrosion resistance in marine and selected chemical environments. In its unalloyed form, mechanical properties are not particularly high. However, it is readily alloyed with numerous other metals to greatly improve the level of strength achievable. Nickel and copper can be […]

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May 6th 2020

Super duplex stainless steel fasteners

Super duplex stainless steels are well-suited to the production of fasteners for industrial applications, due to their unique combination of strength, corrosion resistance and cost-effectiveness. Duplex stainless steels combine the most favourable properties of austenitic and ferritic stainless steels, namely good strength and toughness; relative ease of fabrication; plus they are highly resistant to corrosion […]

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May 5th 2020

High Temperature Nickel Alloys

Nickel is the fifth most common element on earth, but its use was limited commercially until the last century due to the difficulties in extracting and refining it. Since that time, the development of the jet engine was a major catalyst for the development of nickel-based alloys, in order to provide metals that could combine […]

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May 1st 2020

Nitronic 60

Nitronic® 60 (Fermonic 60, UNS21800) is an austenitic stainless steel with incredibly useful physical properties, specifically wear and galling resistance. It is therefore specified for a number of demanding applications despite possessing more modest corrosion resistance and strength compared with alternative alloys.

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Apr 30th 2020

Incoloy 925

Incoloy 925 (Alloy 925, UNS N09925) is a Nickel-Iron-Chromium Alloy that significantly improves upon the strength of Incoloy 825 (Alloy 825, UNS N08825, 2.4858) whilst retaining its favourable corrosion resistance, particularly against sulphuric acid. It is supplied in the aged condition.

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Apr 29th 2020

The welding of stainless steels

Stainless steels are considered to have good weldability compared to many other metals, and can be successfully welded by a number of different techniques with the correct settings and conditions.

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Apr 27th 2020

Inconel 625

Inconel 625 was developed in the 1960’s and achieves reasonably high strength through the addition of molybdenum and niobium to the nickel-chromium base. This imparts solution-strengthening, meaning that no additional heat treatment stage is required. It can comfortably be used up to 650degC with little loss of mechanical properties, and actually retains much of its strength up to 800degC and down to cryogenic temperatures.

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Apr 24th 2020

The role of copper in improving corrosion resistance of stainless steels

Copper is normally present in stainless steel as a residual element only. However, it is added to selected alloys in order to enhance their corrosion resistance, particularly in seawater and sulphuric acid solutions. For many years, copper has been seen as an undesirable element within steel production. It has been associated with ‘hot shortness’, where […]

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Apr 23rd 2020

The role of molybdenum in improving corrosion resistance of stainless steels

The most common application of molybdenum is in the production of stainless steels and nickel-based alloys. Molybdenum is widely understood to improve the resistance to pitting corrosion of stainless steels, and therefore is a key alloying element in their composition. Duplex, super duplex and austenitic stainless steels within Langley Alloys stock range all utilise molybdenum.

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Apr 21st 2020

Which specifications apply to Alloy 718?

Alloy 718 (Inconel 718, UNS N07718, 2.4668) has become widely used in a large number of applications, due to its high levels of performance, plus ready availability in a variety of product forms. Nickel-chromium alloys are probably the most widely used nickel-based alloys. They are characterised by their excellent corrosion resistance at both ambient and […]

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Apr 17th 2020

Inconel 718

Nickel-chromium alloys are probably the most widely used nickel-based alloys. They are characterised by their excellent corrosion resistance at both ambient and elevated temperatures – forming a protective film that prevents further oxidation and retention of their mechanical properties over a wide temperature range. They are better known by the Special Metals Corporation tradename Inconel®, […]

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Apr 17th 2020

Incoloy 825

Incoloy® 825 (UNS N08825/W.Nr. 2.4858) is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. The Incoloy family of alloys are all based upon a nickel-iron-chromium base composition, but with a varying number of additional alloying elements. They were originally developed and produced by the Special Metals Corporation group of companies, which includes the […]

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Apr 16th 2020

New Guide to Duplex and Super Duplex Stainless Steels

Would you like to know more about super duplex stainless steels? How about learning when and where super duplex stainless steels can be used? Interested to read more about how to fabricate, weld and machine super duplex stainless steels? If you’re already expert in these unique alloys, then we’re probably already working together, directly or […]

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Mar 4th 2020

XM-19 for valve stems

XM-19 is most widely specified for the production of valve stems, but what is this grade and why is it used? Most commonly known by the trademarks Nitronic 50 (AK Steel Corp) or Fermonic 50 (Langley Alloys), it is frequently specified against the United States ASTM reference of XM-19, the Euronorm 1.3964 caption, or the unified numbering system S20910 designation. It is an austenitic stainless steel, therefore in the same family as the more standard grades such as 304L and 316L.

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Jan 15th 2020

Copper Alloys from our archives

Langley Alloys history can be traced back as far as 1938, and in those early years is heavily linked to the development of novel copper alloys. Another item from our archives appeared in the office this week – a commemorative plaque cast in our own foundry in 1978. The dates on the plaque related to […]

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Dec 4th 2019

The Stainless Steel Market – 2019

Total production of stainless steel in 2019 is estimated to hit 55 million tonnes, as the overall market for these metals continues to grow around 5% per annum. With a production yield of c. 86%, this equates to just over 46MT of traded products (semis and finished products) in the global marketplace. Duplex, super duplex and super austenitic grades make up only 5% of the overall total global production, with just over half of this being duplex stainless steel.

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Dec 4th 2019

Langley Alloys at Stainless Steel World

Stainless Steel World is the leading exhibition and conference specifically for the stainless steel industry. With nearly 300 exhibitors, and three days of technical presentations running alongside, it showcases the latest products and knowledge of the industry. As the originator of super duplex stainless steels, and a leading distributor of high-performance austenitic, duplex and super duplex stainless steels, it was only right that Langley Alloys should maintain a prominent position within the event. 

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Oct 18th 2019

Another Kasto saw added to the Langley Alloys fleet

Continuing investment in our processing capability has seen another Kasto win A4.6 added to our fleet of saws. This is the fourth CNC-controlled Kasto added to the business in the last 2 years, and the fifth new saw overall, as we try to improve our service offering. Rather than adding additional saws, but with relatively […]

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Aug 30th 2019

What are duplex grades F51, F53, F55, F60 and F61?

F51, F53, F55, F60 and F61 are duplex and super duplex stainless steel designations taken from ASTM A182. This standard is one of the most widely referenced standards for the supply of stainless steels. The American Society of Testing and Materials (ASTM) is one of the world’s largest standards organisations, reviewing, collating and publishing technical […]

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Aug 30th 2019

Super Duplex less impacted by Ni price increases

The production of all metals is subject to pricing pressure. Inflation, energy costs and employee wages are variables that affect all industrial producers. However, other consumables and raw materials have proven more volatile. The pricing of super duplex stainless steels is inherently less volatile than for nickel alloys. Graphite electrode surcharge In recent years, steel […]

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Aug 29th 2019

Applications for Incoloy 825

Incoloy 825 is a nickel-iron-chrome alloy that is widely used in Oil & Gas and Chemical Process Industry applications. It has good corrosion resistance and an ability to operate at higher temperatures than most stainless steels. Incoloy is a trademark of Special Metals Corporation that is applied to a family of nickel-iron-chrome alloys. Nickel-based alloys […]

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Aug 29th 2019

What is Nitronic 50?

Nitronic 50 is a higher-performance austenitic stainless steel that provides approximately twice the yield strength of regular 3xx series stainless steels and improved corrosion performance. It is widely used in a variety of marine and industrial applications. Compared with Alloy 316L, it contains increased chromium and molybdenum additions which support the improved corrosion resistance. Whilst […]

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