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

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

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

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

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

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