Alro logo Alro Steel was established in 1948 by Al and Robert Glick. Today, Alro is comprised of Alro Steel, Alro Metals, Alro Plastics and Alro Metals Outlet.

Alro Plastics Product: TORLON®

Size and Availability:

Sheet / Slab stock:
- Thickness: 3/16”thk to 1”thk standard
- Sheet sizes: 12” x 48” standard
- Custom sheet sizes available upon request

Rod / Round stock:
- Diameters: 3/32”dia to 5”dia
- Rod lengths: 8 ft or 4 ft, varies by diameter

Torlon (polyamide-imide) exhibits exceptional physical and chemical properties. It can withstand continuous exposure at temperatures from 450ºF to 500ºF (230ºC to 260ºC). Torlon 4301 and 4203 resins provide better compressive strength and higher deflection temperature than most other high performance thermoplastics. Their low coefficient of thermal expansion and high creep resistance provide excellent dimensional stability over a wide range of temperatures.

Chemically, Torlon resins are resistant to attack by aromatic and aliphatic hydrocarbons, chlorinated and fluorinated hydrocarbons and most inorganic salts and acid solutions.

As of July1, 2010 Quadrant EPP has changed the name from Torlon 4203 to Duratron T4203 and Torlon 4301 to Duratron T4301.


  • Superior electrical insulation
  • Excellent resistance to radiation
  • Resistance to wear
  • High strength
  • Low coefficient of friction


  • Non-lubricated bearings
  • Seals and valves
  • Compressor parts
  • Piston parts
  • Bearing cages
  • Electrical components
  • High temperature seals