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As your Metals Partner, it is our goal to educate you on various casting processes. Feel free to browse around to learn more but if you have questions or need to submit an RFQ, please contact us. MetalTek International. Because You Demand More Than Metal.

What Is Non-Ferrous Metal?

Posted by Dave Olsen on 11/4/19 3:19 PM

Non-ferrous metals or alloys are materials that are not iron based like their ferrous counterparts. One of the more common groups of non-ferrous materials are copper-based alloys such as bronze and brass. While it is common to use brass and bronze interchangeably, there is a difference.

Brasses are copper-based alloys which have zinc as the principle alloying element. In some cases, small amounts of nickel, aluminum, iron, or silicon may be also present. A good example is C85500 (also known as “60-40 yellow brass”). This alloy contains up to 63% copper, 0.8% aluminum, and around 40% zinc. Since the zinc content is high, the material is classified as brass.

Bronzes are copper-based alloys where the major alloying element is not zinc or nickel. The term bronze is used with a preceding modifier that describes the type of bronze it is, by indicating the major alloying element(s). For example, MTEK 83-7-7-3/C93200 is a high lead tin bronze because it contains 7% tin and 7% lead in addition to 83% copper and 3% zinc. Also, MTEK 175/C95400 is called an aluminum bronze because it is made up of 11% aluminum in addition to 85% copper and 4% iron.

Common bronze families or alloy groups are: Aluminum Bronze, Manganese Bronze, Tin Bronze, Leaded Tin Bronze, and High Copper Alloys.

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Topics: Copper Based Alloys, Non-Ferrous, Alloy Selection, Bronze, Wear Resistance, Wear

What Is Wear?

Posted by Dave Olsen on 10/10/18 4:37 PM

Walking across a grocery store parking lot, six-year-old Danny stumbled, fell down and did further damage to his already worn jeans.  He looked up with little tears in his eyes and said, “Daddy, maybe you should get me pants made out of steel!”  That got Daddy to thinking: What really is wear and what makes a metal resist it?

Among other qualities, metals are characterized by their toughness and by their hardness.  Toughness is the ability of a material to absorb impact without fracturing.  Hardness is the material’s ability to resist indentation, so typically the harder the material, the better it resists wear.  But hard materials are, generally, not tough materials.  A high impact application with a lot of wear would be a difficult environment.  Metal selection often demands tradeoffs. 

Like Danny’s jeans, wear in metals comes in various forms and can be caused by a variety of events.

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Topics: Non-Ferrous, Ferrous Alloys, Wear Resistance, Wear

Why Certain Metals Offer Greater Wear Resistance

Posted by Dave Olsen on 10/24/16 2:06 PM

One regularly hears recommendations about material selection. Use this alloy for superior heat resistance. Or that for seawater corrosion.  Or this other one for a high wear application.  But what about the alloy actually makes it deliver that performance?

In this installment, we will explore some simplified technical reasons – at the microscopic level - why certain metals inherently offer greater resistance to wear.

First, a definition of “wear.” In our context, we will define wear as the loss or deformation of a metal that is the result of the mechanical interaction with another material (not necessarily metal). Wear may take a number of forms including abrasion, adhesion or galling, erosion, and spalling.  It is highly impacted by product design and installation.  The rate and types of wear can also be affected by temperature and the fluid environment.  Wear is often measured as the amount of mass that is lost in a given period.

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Topics: Wear Resistance, Mechanical Properties, Wear

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