Rolled Alloys Blog

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 ...read 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 experience...read 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 ...read 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 www.rolledalloys.com, select Weld Wire Selection from the tools menu ...read 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 ...read 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 ...read 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 ...read 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 example...read 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. The...read 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. ...read 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 ...read 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 ...read 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 is...read 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 strengths...read 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. ...read 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 steel...read 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 ...read 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 bar...read 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 ...read 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 ...read 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 ...read 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 ...read 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 ...read 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 ...read 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 expertise...read 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 ...read 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 nickel...read 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 ...read 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 ...read 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, ...read 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 expand...read more

Carburizing

Carburizing is one of the most commonly performed steel heat treatments. For perhaps three thousand years it was performed by packing the low carbon wrought iron parts in charcoal, then raising the ...read more

Selecting Filler Metals for Dissimilar Alloy Welding

Have you ever wondered what is the best filler metal for welding two different alloys together? A common question I receive is the proper alloy filler metal for joining two dissimilar metals.  ...read more

Rolled Alloys paper presented at EPRI Conference in Orlando

On June 23, Devin Wachowiak gave a presentation at the EPRI Conference in Orlando, FL on the successes of AL-6XN and ZERON 100 in pollution control, more specifically for applications within Flue Gas ...read more