Category Archives: Material

Eyeglass Frame Material

Eyeglass frames are made out of many different composite materials and formulas, but the basic groupings are metal and plastic. In plastics, zyl is the most common although lower quality plastics are used in the cheaper frames. Nylon is often used in sport sunglasses due to its impact resistance and flexibility. Among the metals, monel is most common, followed by titanium, stainless steel, nickel silver, alpaca, and aluminum. Zyl Zyl is a short name for the material cellulose acetate, which […]



Titanium is 30% stronger than steel, but is nearly 50% lighter. Titanium is 60% heavier than aluminum, but twice as strong. Titanium has excellent strength retention to 1,000 degrees Fahrenheit. Titanium is alloyed with aluminum, manganese, iron, molybdenum and other metals to increase strength, to withstand high temperatures, and to lighten the resultant alloy. Titanium’s high corrosion resistance is also a valuable characteristic; as when exposed to the atmosphere, titanium forms a tight, tenacious oxide film that resists many corrosive […]

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Following DFM Guidelines for Working with Sheet Metal

Engineers can turn out sheet-metal designs that are both highly functional and easy to make by following Design for Manufacturing (DFM) principles. Engineers designing sheet-metal enclosures and assemblies often end up redesigning them so they can be manufactured. In fact, research suggests that manufacturers spend 30% to 50% of their time fixing errors and almost 24% of those errors are related to manufacturability. The reason behind these preventable engineering errors is usually the wide gap between how sheet-metal parts are […]

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17-4 PH Stainless Steel

17-4 PH Stainless Steel (AISI 630)   17-4 PH is a precipitation hardening, martensitic stainless steel (17Cr-4Ni). It is noted for its high strength and hardness, excellent corrosion resistance and easy heat treatment. 17-4PH is usually machined to finished dimension in the solution heat treated and then strengthened by age hardening via the low temperature treatment process described below. 17-4 PH is magnetic in both the solution treated and age hardened conditions.   TYPICAL CHEMISTRY: C  0.07 max.   Mn  1.00 […]

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