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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standard pilger die

Using laser shock peening to increase pilger die life

December 1, 2009

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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

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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

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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

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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

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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

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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

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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

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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

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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

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

August 8, 2006

Editor's Note: This article is Part II in a two-part series on warm forming stainless steel. Part II discusses simulation and experimental studies conducted by the ERC/NSM on formability of stainless steel at elevated temperatures. Part I, which appeared in July, discussed the rationale for and...

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Warm forming of stainless steels - Part I

July 11, 2006

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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Structured sheet metal - Part II

June 13, 2006

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Vault-structured sheet metal undergoes very little strain hardening during structuring, so it can be deformed further into shapes such as cans, containers, washing machine drums, thin-walled detector tubes, heat exchangers, and light reflectors.

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Measuring the plastic strain ratio of sheet metals

June 13, 2006

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Determining how much a metal can deform before thinning or fracture occurs is necessary for designing a reproducible forming operation. Testing the incoming sheet material is also essential because material properties may vary from coil to coil and affect the part quality and scrap rate. Understanding a material's plastic strain ratio and how to measure it are crucial in accurately establishing a material's formability.

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