Product News: Materials & Material Processing

Glass Fiber features tensile modulus of 14,359 ksi.

Press Release Summary:

November 20, 2012 - Developed using Modular Direct Melt production technology, S-3 UHM™Â utilizes unique formulation of S-Glass raw materials to develop mechanical properties. Material is available in range of different formats including yarns, rovings, and chopped fibers. With S-3 UHM, designers and manufacturers will be able to use glass fiber reinforcement in areas previously limited to other types of fibers.

Original Press Release

AGY Introduces New Glass Fiber with Unprecedented Tensile Modulus Level

Press release date: November 7, 2012

AIKEN, SC  USA - AGY, a leading global producer of glass fiber yarns and high-strength glass fiber reinforcements, has introduced a new glass fiber with an unprecedented tensile modulus of 99 GPa (14,359 ksi) - a level not previously seen in commercial glass fiber products. 

Called S-3 UHM™ glass, this ultra-high modulus material was developed using AGY’s advanced Modular Direct Melt (MDM) production technology and utilizes a unique formulation of S-Glass raw materials to develop the mechanical properties.  According to AGY President Drew Walker, “The creation of our improved fiber manufacturing technology coupled with an in-depth understanding of the constituent chemistries enabled us to develop this new material which increases the tensile modulus by 40% above that of traditional E-Glass fibers.”

The new material will allow designers and manufacturers to use glass fiber reinforcement in areas previously limited to other types of fibers.  “It is an exciting opportunity for our customers,” continued Walker. “It brings a new level of tensile modulus to the arena of glass fiber without losing any of the unique properties that glass brings as a component of composites such as electrical and thermal insulation, and high impact absorption and low coloration of the resin system.”

Commenting on the rapid growth of the company’s range of available fibers including the recent introductions of S-1 HM™ rovings, S-3 HDI™ yarns and L-Glass™ yarns, Walker said “It shows how AGY is developing glass technologies to meet the demands of the marketplace and highlights our ability to translate customer needs into products in the glass fiber arena.  Our new S-3 UHM glass fibers will be a unique fiber in the market, offering a new level in the ability of glass fibers to meet the demands of a broad range of applications.”

S-3 UHM is available in a range of different formats including yarns, rovings and chopped fibers. For more information, please contact AGY at (803) 643-1501 or visit

Note:  If you would like more information about this story, or if you would like to speak with an AGY spokesperson, please contact Kris Jommersbach at


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