Turner MedTech manufactures products for the medical, life science, physical science, and security and defense industries. Now their GMASS high-density ABS-based filament, which uses a variety of metallic fillers, boasts a density approaching traditional metals.

Turner says that, while this new material offers the design flexibility of ABS plastic, objects made from it have the weight and feel of metal castings.

GMASS, a patent-pending and specially-formulated, high-density, ABS-based filament includes non-toxic fillers which make it appropriate for applications requiring radiation shielding and the company says it does so without the environmental impact of lead. It is available in limited configurations to allow further design enhancements.

Designed for rapid prototyping, Turner MedTech says GMASS is also an excellent material for low-quantity additive manufacturing applications.

Available in Natural, Red, Blue and Dark Gray, the 1.75 +/- 0.10 mm diameter filament uses a base material of ABS plastic and a filler material composed of proprietary compounds of bismuth and tungsten.

Featuring a density range of from 2.7 +/- 0.1 g/cc for bismuth to 4.0 +/- 0.2 g/cc for tungsten, MedTech says printed part densities could vary due to printer processing parameters and adds that those densities should be confirmed by the user prior to use.

GMASS filaments have been formulated for use with 3D printers employing a heated bed of between 100°C-110°C and the company recommends that printing temperatures should fall in the 200°C - 230°C range.

Dr. Clark Turner, the Founder and CEO of Turner MedTech, says the GMASS material will soon be used by an x-ray equipment company to prototype an x-ray collimator.

You can get more details about GMASS here.