Physical Properties for UHMW Board Stock & Angle

UHMW Board Stock & Angle
Duravar UHMW

Property

ASTM Test

Units Metric(US)

Typical Values

Mechanical Properties

Density

Tensile strength @ Yield

Tensile strength @ Break

Elongation @ Break

Youngs (“E”) Modulus (23°C)

Youngs (“E”) Modulus (-269°C)

Izod Impact Strength (23°C)

Izod Impact Strength (-40°C)

Hardness, Shore “D”

Abrasion Resistance

Water Absorption

Relative Solution Viscosity

 

D792

D638

D638

D638

D638

D638

D256(1)

D256(1)

D2240

(2)

D570

D4020

 

gm/cm3

MPa (psi)

MPa(psi)

%

MPa(psi X 105)

MPa(psi X 105)

J/m(ft-lb/in notch)

J/m(ft-lb/in notch)

-

-

%

dl/gm

 

0.926-0.934

21(3,100)

48(7,000)

350

690(1.0)

2,970(4.3)

140(30)

100(21)

62-66

100

Nil

2.3-3.5

(1)     Izod Impact Strength: samples have two (15° ± ½°) notches on opposite sides to a depth of 5 mm.

(2)     Abrasive wear is measured in the laboratory by a “sand/water-slurry test”, in which a sample is rotated at high velocity in a sand/water slurry for 24 hours. The following table gives an indication of the abrasion resistance of DURAVAR UHMW polymer. A value of 100 was designed for the amount of volumetric abrasion loss to UHMW specimen. The values shown for other materials are their relative loss compared to DURAVAR. The higher the figure, the greater the abrasion loss.

 

DURAVAR (UHMW-PE)                     100              

Acetal Copolymer (POM)                    700

Stainless Steel                                  160                  

Polyvinyl Chloride (PVC)                     920

Polytetrafluoroethylene(PTFE)             530                  

Polymethylmethacrylate(PMMA)         1,800         

PTFE(25% Glass Fiber)                      570                  

Phenolic Resin (PF)                           2,500

Low Density polyethylene (LDPE)       600                   

Beechwood                                       2,700

      Polypropylene (PP)                            660                  

      Epoxy Resin (EP)                              3,400

Thermal

Crystalline Melting Range, Powder

 

Coefficient of Linear Expansion

20 to 100°C

-200 to -100°C

 

Polarized Microscope

 

D696

D696

 

°C(°F)

 

 

K-1

K-1

 

138-142(280-289)

 

 

~2 X 10-4

~0.5 X 10-4

Electrical

Volume Resistivity

Dielectric Strength

Dielectric Constant

Dissipation Factor

At 50 Hz

    103 Hz

    105 Hz

 

D257

D149

D150

D150

 

 

O cm

KV/cm (V/mil)

-

 

-

-

-

 

>5 X 1016

900(2,300)

2.30

 

1.9 X 10-4

0.5 X 10-4

2.5 X 10-4

Comparison of Dynamic Coefficient of Friction on Polished Steel

Property

UHMW-PE

Nylon 6

Nylon 6/6

Nylon/MoS2

PTFE

Acetal Copolymer

Dry

Water

Oil

.10 -.22

.05 -.10

.05 -.08

.15 -.40

.14 -.19

.02 -.11

.15 -.40

.14 -.19

.02 -.11

.12 -.20

.10 -.12

.08 - .10

.04 - .25

.04 - .08

.04 - .05

.15 - .35

.10 - .20

.05 - .10

General Machining Guidelines
Cutting: Band Saw: 3,300 – 6,600 ft./min. circular saws: 10,000 – 13,000 ft/min.
Turning:
Up to 2,000 ft/min.

Note:
Higher cutting, turning, and drilling speeds may require compressed air, water, or cutting oil for cooling.

The information herein contained is based upon data believed to be thoroughly reliable, but no guaranty or

warranty with respect to accuracy or completeness or product result is implied and no liability is assumed. It is

the responsibility of the user to verify suitability of the material for their particular use or purpose. In view of the

many uses of this material and the different equipment and processing techniques used, we cannot guarantee

results in specific instances. No statement contained herein should be construed as a recommendation or license

to use our products in a manner that would constitute infringement of any patent.

Article Title:
Physical Properties for UHMW Board Stock & Angle
Article Summary:
Physical, Mechanical, Electrical and Thermal Typical Properties.
Article Date:
1/27/2009
Article ID:
548
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