Metals/Materials Articles

The metals/materials technology area has information on the most commonly used materials in metal fabrication ̶ carbon steels; stainless steels; high-strength, low-alloy steels (HSLAs); and the 6000 series aluminum ̶ and those that aren't as common, such as the red metals, refractory metals, titanium, and magnesium.

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Low carbon steel expansion joint

Just plain carbon steel — What is it?

March 9, 2010 | By Professor R. Carlisle "Carl" Smith

Is there any such material as plain carbon steel? Is so, what is it, what's its chemical composition, and which applications are best-suited for its use?

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scratching test

Continuing the look at die materials and wear in stamping AHSS

March 9, 2010 | By Eren Billur

Stampers use tests to evaluate tool materials and coatings for wear issues. The main tests are scratching tests, twist compression test, strip-reduction tests, and forming tests.

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tool failure mechanisms

Die materials and wear in stamping AHSS

January 9, 2010 | By Eren Billur

Advanced high-strength steels (AHSS) are used extensively in the automotive industry to help improve crash safety and reduce weight. With the increased strength of AHSS, however, come dramatically increased springback and forming load (and, therefore, contact pressure) compared to milder steel grades.

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standard pilger die

Using laser shock peening to increase pilger die life

December 1, 2009 | By David Lahrman

During pilgering, the dies endure extreme amounts of stress. Shot peening is a conventional, economic process for hardening the tooling, but its benefits are limited. Supplementing shot peening with laser shock peening where the stress is highest can help to extend the service life of the tools.

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Is cast iron just cast iron?

April 28, 2009 | By Professor R. Carlisle "Carl" Smith

Cast iron comes in many different types with different properties. Not all can be welded, cut, or machined in the same way, and some types are better suited for specific applications than others. This article discusses the most common types and how to use them.

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6 Questions about stamping aluminum

November 25, 2008 | By Almetals

Aluminum's unique metallurgical properties make it suitable for multiple applications. Aluminum has very high corrosion resistance, Aluminum's specific weight is 2.7 kilogram/dm3 compared to 7.8 kg/dm3 for steel and 8.8 kg/dm3 for copper, and is thermally and electrically conductive.

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C-Pillar die faces deep drawing

Improve HSS part quality before die tryout

April 15, 2008 | By Dr. Markus Thomma, Thomas Brenne

The use of high-strength steels (HSS) and aluminum in automotive and other stamping manufacturing is creating forming challenges for tool and die engineers. Forming simulation software, formerly used to predict conventional failure causes, now also enables the stamping tool and die engineer to simulate secondary operations, including springback to avoid expensive and time-consuming die tryouts.

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Nanofiber technology

The nanofiber factor

March 11, 2008 | By Travis Haynam

Nanofibers--fibers 1,000-times smaller than the diameter of a human hair--can help to improve filtration efficiency, filter cleanability, filter life, and energy consumption when the cartridge filters are used properly.

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Sheet metal image

Stamping 101: Material guidelines

January 15, 2008 | By Daniel J. Schaeffler

Each metals has its own blend of physical, chemical, and surface properties and characteristics. Knowing about the major work metals (not tool steels), their properties, grades, and characteristics helps to achieve the best results in stamping and forming best results.

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Stainless Steel Workshop: Duplex stainless and its alloys

January 15, 2008 | By Jeff Heagey

What is duplex stainless steel?Duplex stainless is fast becoming the material of choice when improved corrosion resistance and mechanical properties are required. Through the combined efforts of the steel producers and the filler metal manufacturers, the market is better equipped to use these...

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Cold spraying

Protecting magnesium alloys from corrosion

November 6, 2007

Finding cost-effective solutions for protecting magnesium alloys from corrosion has become paramount in automotive design. Corrosion protection through cold spray might be the answer.

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Almetals staff

Ask for help

August 8, 2007 | By Almetals Company

Simply stated, ask. According to a recent Purchasing Magazine survey, buyers say they expect their distributor suppliers to provide them with the lowest prices and highest service levels. Separately, distributors say buyers do press them to provide more information, especially on pricing...

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New forms for modern autobody stamping

September 12, 2006 | By Jens Aspacher

With the introduction of stronger safety legislation and increased fuel prices, auto manufacturers must respond with higher car body stiffness for safety and lower body weight for fuel efficiency. The fields of materials development, engineering, and manufacturing are working together to achieve autobody weight reduction with improved crash characteristics.

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Warm forming of stainless steels - Part II

August 8, 2006 | By Ajay Yadav, Giovanni Spampinato, Taylan Altan, Ph.D.

The ERC/NSM conducted experiments using round cup tooling to determine the influence of temperature on the limiting draw ratio – the largest draw ratio of the blank-to-cup diameter that can be drawn successfully.

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Warm forming of stainless steels - Part I

July 11, 2006 | By Ajay Yadav, Giovanni Spampinato, Taylan Altan, Ph.D.

To prevent martensitic transformation in stainless steel during drawing operations, warm forming has been explored. In experiments, warm forming eliminated intermediate annealing operations and substantially increased limiting draw ratio values.

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