Rolled Alloys Blog

Plasma or Laser Processing: To Cut or Not to Cut

by Hugh Thompson - Watch Hugh explain the difference between Plasma and Laser Processing Plasma and laser cutting are fast, productive industrial processes for cutting metal parts. These more

Alloys and Acid Performance

Metallurgy with Marc Glasser Marc Glasser is the Director of Metallurgical Services at Rolled Alloys. He's been with RA for nearly 9 years and has worked as a metallurgist in Material Science for more

RA330 Day and its Significance at Rolled Alloys

RA330 was created at a time when the thermal processing industry needed a reliable source for a wrought alloy that could withstand the extreme temperatures of heat treating. Who knew this alloy more

Process vs. Process

Which processing method is best for your needs? Rolled Alloys strives to be a one stop shop for our customers by providing a variety of services and processing methods to the many industries we more

How Rolled Alloys Has Leveled Up During The Pandemic

At a time when the entire world was (and still is) learning to function under new restrictions, Rolled Alloys has taken some necessary steps to level up during the pandemic. Deemed as an essential more

Stop Corrosion Before It Starts!

Corrosion can occur when an alloy is exposed to moisture and other elements or chemicals which cause the material to deteriorate. Rolled Alloys has put together a list of tips to help you avoid more

5 fun things to do this 4th of July (While Social Distancing)

The 4th of July is a holiday that many of us look forward to every year. Fireworks displays, spending time with family and enjoying good food are the things we look forward to the most when thinking more

Rolled Alloys - Over 67 years in the Thermal Processing Industry

Rolled Alloys has been committed to servicing the needs of thermal processing industries for 67 years, by being a reliable source of RA330®. RA330® is a wrought alloy that can handle high more

2507 Benefits and Comparisons

Rolled Alloys has an extensive inventory of 2507 items which include Plate, Sheet, Bar, Pipe, Fittings and Welding products. 2507 is a super duplex stainless steel, designed for applications which more

4 Reasons Duplex Stainless is replacing Conventional Stainless Steel

Over the years duplex stainless steel usage has increased drastically. This can be attributed to a combination of market growth along with the four properties of duplex stainless steel that we more

Rolled Alloys Metallurgical Services (RAMS) ON THE GO!

Did you know that we have RAMS technical resources that you can access on our website? We know that in this industry, things often come at us fast and sometimes we just need a quick answer for our more

Rolled Alloys Metallurgical Services (RAMS) During COVID-19 Outbreak

We hope that everyone is staying safe and taking the necessary precautions to minimize exposure with the current outbreak of COVID-19. While the majority of people are quarantining until the virus is more

Machinability Guidelines and Comparisons

An often asked question is how to compare machinability of different alloys. The answer is available here on our website. The key column is relative machinability, listing speed as a percentage more

Rolled Alloys Lab Services

Rolled Alloys Metallurgical Services (RAMS) is dedicated to our customers and can provide the following services at no cost: Failure analyses:  we have more than 60 years of technical more

Duplex Grain Size in Austenitic and Nickel Based Super-alloys

Metals have a crystalline structure. When a metal solidifies from the molten state, a multitude of tiny crystals start to grow. These crystals form the grains in the solid metal.  As a wrought more

Titanium Grades and Relative Properties

Rolled Alloys, a supplier of titanium and titanium alloy materials, offers the information below in order to facilitate a basic understanding of the different grades of titanium and titanium alloys, more

Stress Corrosion Cracking

Stress Corrosion Cracking (SCC) is a common issue with many specialty alloys. SCC is often associated with chlorides, but can also occur with caustics and other corrosive media. The most common type more

The Rolled Alloys Batting Order

You may not know it from the weather, but baseball season has started. At the beginning of every baseball game, the managers meet at home plate to give the umpires their lineups. Here at Rolled more

Inclusions and Laminations

Inclusions and laminations naturally exist in all metal and alloy products. Most people hear the words inclusion or lamination and think defect, but one should not fear these words and automatically more

PREn - Pitting Resistance Equivalent Number

The pitting resistance equivalent number (PREn) is a theoretical way of comparing the pitting corrosion resistance of various types of stainless steels based on the chemical compositions of those more

Temperature Limits - What Do They Really Mean?

Data sheets for most heat resistant alloys list a temperature limit. What does this temperature limit really mean? Can material always be used up to that temperature limit? The answer is: it depends. more

Utilizing our Weld Wire Selection Tool

Rolled Alloys provides an online tool; the Weld Wire Selector to help determine the best wire options when welding. When visiting, select Weld Wire Selection from the tools menu more

What condition is your PH or age-hardenable steel in?

There is a lot of confusion about the condition that age hardenable materials, such as 17-4 or 718 are in.  Are they annealed, solution annealed, or aged and how can you tell?  These more

The 1953 introduction of RA330

In 1953, when Rolled Alloys was founded as an independent company, RA330 was introduced as a wrought alternative to cast HT, which at the time was a 35% Ni, 15% Cr alloy. In 1958, the chemistry was more

RA 602 CA for the Most Severe High Temperature Applications

  RA 602 CA® is an alloy for the highest temperature applications, in most environments. This is why we call RA 602 CA the high temperature powerhouse alloy.     Cr Ni C more

Heat Distortion

When metals are heated, they expand. The amount of expansion to be expected is well defined in most cases as the coefficient of thermal expansion is a commonly reported physical property for most more

RA 253 MA Alloy – Still Growing, After All These Years

While RA330® has been a solid alloy choice for carburizing, nitriding and many other heat treating applications, stainless alloys such as 304H, 309 and 310 are also used extensively in industrial more

Ferrite Content in Austenitic Stainless Steels

The basic 300 series stainless materials like 304/L and 316/L have an austenitic microstructure and are non-magnetic.  That is, in the annealed condition they are essentially free of ferrite, more

Rust and Stains on Stainless Sheet and Plate Products

Stainless steels are, unfortunately, not always stainless. Although we strive to provide products that are clean, rust free and stain free, this is not always possible to achieve.  There are a more

The Origin of Alloy 20

The origin of Alloy 20 can be traced back to the invention by Carpenter Steel in 1951. The alloy was introduced as Carpenter Stainless 20 and represented the development of a wrought alloy that was more


Rolled Alloys participated with RAMS personnel Glenn Byrne, Justinn General and Paul Whitcraft.  Some highlights of the week included: To start off the week, NACE released the final report on more

6% Molybdenum Superaustenitic Alloys

This class of alloys was introduced in the early 1970s, largely in response to the need for a cost effective alloy with resistance to brackish water or seawater environments.  The main driving more

Confused about Annealing / Heat Treating Terminology?

In the broadest sense annealing is the process of heating an alloy to an elevated temperature to promote a homogenous chemistry, equiaxed microstructure and uniform mechanical properties  to more

Manganese Substitution Grades of Stainless Steel

During World War II when nickel shortages were severe, the stainless steel industry turned to manganese as a substitute.  Manganese is about half as effective in forming austenite as is nickel, more

Searching for a Furnace Fixture Alloy?

There are many different types of furnace fixtures and many different alloys to choose from, but for many furnace and other high temperature applications, RA330® is a logical first choice. Since more

Unspecified and Trace Elements

All steels and nickel alloys contain residual elements that are not required to be analyzed or reported on the Mill Test Certificate. It is not practical to analyze and report every element in the more

NACE MR0175/ISO 15156/NACE MR0103

NACE International has developed two significant standards relative to the use of materials in hydrogen sulfide bearing environments. One is titled MR0175/ISO 15156, Petroleum and Natural Gas more

NORSOK M630, M650

The NORSOK standards are developed by the Norwegian petroleum industry and are intended to replace oil company specifications and serve as references for industry regulations. Subject to development more

Stainless and Nickel Alloy Welding

The general techniques and procedures for welding are similar for all stainless and nickel alloys. Individual alloys, or families of alloys, may require more restrictive procedures and processes, but more

Flat Bar or Gauered Flat Bar from Plate

It is possible to find some on-the-shelf structural shapes in 304 and 316 stainless. Flat bar sizes are generally available and extruded shapes of the most common sizes of angles, tees and I-Beams more

Ferric Chloride Corrosion Testing

ASTM has issued G48, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution. G48 contains six different test more

UNS N08xxx Alloys in ASTM & ASME Specs

Around 1964 a decision was jointly made within ASTM committees A01 on Steel and B02 on Non-ferrous Metals and Alloys to incorporate coverage of the high nickel stainless steel alloys into the nickel more

CORROSION 2015 Conference

Rolled Alloys has been a long time participant in NACE® International – The Worldwide Corrosion Authority. NACE International was founded in 1943 by a group of corrosion engineers involved more

PMI Testing

Positive Material Identification (PMI) has become more prevalent and more practical in recent years. The development of portable x-ray fluorescence (XRF) units using x-ray tubes instead of isotopes more

Stainless and Nickel Alloy Machining

In general terms, machining stainless and nickel alloys is more difficult than machining low alloy steels. However, there are a wide range of stainless alloy compositions and a few of them (such as more

Pipe Sizes and Tolerances

Steel pipe sizes around the world are standardized on  historic dimensions that are now referred to as Nominal Pipe Sizes (NPS). In addition to standardizing the nominal outside diameter (OD), a more

Facts About LME

LME – No, we’re not talking about the London Metal Exchange!  LME in this case stands for Liquid Metal Embrittlement. Molten metal can cause a variety of problems in a range of more

Dual Certification

The term "dual certification" is most commonly used to refer to the practice of certifying a material as meeting the requirements of a specification(s) as two different alloys. The most common more

Catastrophic Oxidation

You may have heard about, or even seen, the effects of what is termed “Catastrophic Oxidation”. This is a rapid localized metal loss due to oxidation associated with the exposure of more

The Unified Numbering System

The Unified Numbering System (UNS) is an alloy identification system created in the early 1970’s and formalized with the issuance of joint standard ASTM E527 and SAE J1086 in August of 1974. more

Why? Why? Why? 316Ti – UNS S31635

It is common to find a connection to a German equipment manufacturer or design. However, 316Ti is practically non-existent in North American inventory, and usually requires a mill production run. more

Bar Product Terminology and Finish

The terminology used for bar products is occasionally misunderstood. General requirements, such as those for tolerances, marking, packaging, etc., are standardized in ASTM A484 for stainless bar more

What are Stainless Steel Surcharges?

The purpose of the surcharge is to offset the rapid rise and fluctuating costs of raw materials that are included in each individual alloy. The surcharge is an additional charge, usually per pound, more

RAMS Blog – Seeking Your Advice

Within these areas we have touched on properties and applications of established and newer alloys.  We have discussed issues to consider when ordering material, such as flatness and standard more

Reading Material Test Reports

Understanding Material Test Reports (MTRs) can be difficult to the uninitiated or to those who seldom need to interpret them.  There is no standard format for reporting the required information.& more


Are you seeing requirements calling for the passivation of stainless steels? Stainless steels, even the least alloyed, will passivate immediately upon exposure to air.  This is basic physical more

Pitting Corrosion

What is pitting corrosion and how does it happen? Pitting corrosion is in itself a corrosion mechanism, but is also a form of corrosion often associated with other types of corrosion mechanisms. It more

The Debate: Cast vs Wrought, Which is Better?

Both castings and wrought alloys have their place in the heat treating world, but learn where and when to use each. For example, cast materials typically have higher yield, tensile and creep more

RA 602 CA: Strongest & Most Heat Resistant Alloy Available from Stock

RA602CA is a nickel base alloy that can be used for many severe high temperature applications.  This alloy nominally contains 63 Ni, 25 Cr, 2.2 Al, and small quantities of Zr, Y, and 0.2 C. more

RA330: Over 60 Years of Proven Success in the Heat Treat Industry

RA330 has a proven history for use in high temperature applications, and is a very versatile material.  With a nominal composition of 35 Ni and 19 Cr, chemically it is more than a stainless more

Is there a difference between Billet and Bar?

The difference is subtle but extremely important! Billet is a semifinished round which has been partially worked, but will be further worked to final size.  Bar is finished material that has more

Better, Stronger, Cheaper; RA 253MA is Your Solution

As a follow up to the recent blog entry about creep strength and what that is, you might be wondering which alloys have better creep properties than others.  Typically, creep properties follow more

High Temperature Creep Rates and Creep Rupture

Creep-Rupture Why short term yield and tensile properties may not be useful at high temperatures. Metals behave much differently at high temperatures than they do near room temperature. If a metal more

Plate Product Thickness Variations

With the increased capability of hot mills to rolls heavy coil (up to ½” thick) product in stainless and nickel alloys, has come an increased awareness of the thickness variations that more

Plate and Sheet Flatness

We would prefer if all plate and sheet were “flat”.  Unfortunately, the reality is quite different and the standard commercial specifications to which these products are produced more

Wet Scrubber Ductwork using Rolled Alloys 253 MA

Recently, Envitech was tasked by a leading waste oil refiner in Southern California to supply and install a wet scrubber on a process gas afterburner.  The goal of the project was to reduce the more

How does a brand name provide a benefit?

ZERON 100 Super Duplex Compared to Generic S32760 Super Duplex. ZERON® 100, developed as a wrought super duplex in the 1980s, was given the code UNS S32760 in 1989.  Since that time several more


REACH (Registration, Evaluation, Authorization and restriction of Chemicals) is the system for controlling chemicals in the EU. It was adopted by the European Union on December 18, 2006. It became more

Polysilicon plant in China selects RA330 for longer life.

In the U.S., RA330 is the workhorse of the heat resistant alloys. It has good strength, carburization and oxidation resistance to 1150℃. If the application is in high working temperature with more

NORSOK M 650 Requirements

Why are customers asking for products manufactured by Norsok M650 qualified mills? Oil and Gas Customers increasingly ask for products manufactured by NORSOK M 650 qualified mills. NORSOK M 650 is a more

What is alloy sensitization?

What alloys are prone to sensitization and how to avoid it? Sensitization refers to the precipitation of carbides at grain boundaries in a stainless steel or alloy, causing the alloy to be more

Looking for an EN10204, 3.2 Certification?

EN10204 is a Euronorm (issued by the European Community) specification that describes different types of material test reports and certifications.  The standard contains no requirements relative more

Does choosing the best material for the job have you stymied?

It isn’t an exact science and it is often necessary to be guided by past experience and to make informed judgments based on sometimes incomplete information or data. Consider using the more

Selecting a Material for High Temperature Service

Having trouble selecting materials for applications in high temperature environments? The checklist below will help with the questions that you will need to ask for proper material selection. It is more

How to weld Duplex Stainless Steel

I often receive questions on the correct parameters for welding duplex stainless steels. There seems to be a lot of confusion on which practices and quality checks are best. I also notice that each more


Why controlling the procedure is just as important as controlling the end product? The Engineering Equipment and Materials Users Association (EEMUA) out of England has been increasingly concerned more

ZERON 100 Selected to Replace C-276 Heat Exchanger Tubes

A Spanish hydrometallurgical plant was using C-276 heat exchanger tubing to heat a raffinate solution.  The tubes had steam on the outside at 155°C (inlet) to 100°C (outlet) and more

How does RA 253 MA compared to 309 and 310?

The main differences between RA 253 MA and both 309 and 310 stainless steel are the additions of cerium, increased silicon and nitrogen to RA 253 MA. RA 253 MA also has a lower alloy content of more

Do You Use Silicon-Carbide Hearth Plates?

Nickel-base or nickel rich alloys are highly suited for high temperature application, especially carburising ones. This makes them attractive and suitable for high temperature environment; heat more

How to Measure Tensile Strength, Elastic Modulus, and Ductility

Tensile Strength Tensile strength, or ultimate tensile strength, measures a metal’s resistance to breaking or pulling apart in two pieces.  To find out how strong a wire is, one could just more

Visit Rolled Alloys at the Global Petroleum Show; June 12-14, 2012

Rolled Alloys is exhibiting at the Global Petroleum Show Expo and Conference in Calgary, Alberta.  We will have representatives from our sales, marketing, procurement, and technical groups more

Have you heard of the 2205 failures in FGD units?

Rolled Alloys has completed a full corrosion study comparing 2205 to ZERON 100, AL-6XN and C-276 in typical FGD service. You may or may not be familiar with Flue Gas Desulfurization or the issues more

Sigma Formation

Do you know what elements cause sigma formation? Will 310S or 304H have more resistance to sigma formation? All of our nickel-bearing stainless and nickel base alloys have an austenitic structure, more

Galvanic Corrosion

Here is a good paper written by Roger Francis on “Galvanic Corrosion of High Alloy Stainless Steels in Sea Water” The coupling of dissimilar metals in conducting, corrosive solutions such more

Thermal Fatigue Cracking

Thermal fatigue cracking is the cracking that happens after a metal is repeatedly heated and cooled rapidly. Heat resistant alloys all have high coefficients of thermal expansion; most of which more