4320
Low Shrinkage, Plus High Impact Resistance Even at Cold Temperatures
Boltaron® 4320 sheet’s ultra-high impact strength and low shrinkage make it ideal for orthotics and prosthetics applications and other uses requiring durability and dimensional stability in forming and in use.
Characteristics
- Low shrinkage in thermoforming
- Dimensional stability in use
- Highest available impact strength of materials in its class
- Meets UL 94 V-0
- Widest range of colors and textures
Uses
- Orthotic braces
- Prostheses
- Electrical enclosures in damage-prone, frigid areas
Performance Details
FAR Ratings
- FAR 25.853(a)(i) (Flammability) (Vertical burn, 60 sec) Pass
- FAR 25.853(a)(ii) (Flammability) (Vertical burn, 12 sec) Pass
Properties
- Name Test Method Imperial Metric
- Specific Gravity ASTM D792 1.35
- Tensile Strength ASTM D638 5,700 psi 39.3 MPa
- Flexural Strength ASTM D790 8,700 psi 60 MPa
- Flexural Modulus ASTM D790 308,000 psi 2,125 MPa
- Izod Impact Notched ASTM D256 73°F 20.0 ft-lb/in 23°C 1,068 J/m
- Hardness Rockwell ASTM D785 106
- Heat Deflection Annealed ASTM D648 167.5°F @ 264 PSI 75.3°C @1.8 MPa
- Flammability - UL UL 94 @0.130 in. (3.3mm) 94 V-0; 5 VA(1)
- @ 0.130 in. (3.3mm) min. gauge UL 94 94 V-0; 5 VA(1)
- @ 0.040 in. (1.1mm) min. gauge UL 94 94 V-0; 5 VB(2)
- Forming Temperature 335 - 385°F 168 - 196°C
- Heat Deflection (unannealed) ASTM D648 167°F @ 264 psi 75.3°C @ 1.8 MPa
* Independent lab tests. All tests at 73 °F (23 °C) in dry conditions unless otherwise noted.
Sheet Sizes
- Name Imperial Metric
- Lengths 120 in 3,048 mm
- Widths 60 in. to 1,524 mm
- Gauges from 0.028 to 0.250 in from .71 to 6.35 mm
- Custom Sizes Blank sizes, gauges on request