Machinist-Materials, 
Plastics Comparison Table.  

Stainless comparison Table:

Materials for sale listings:

A handy table so that you can compare some plastic materials. On of the main reasons 
that we put this table on the website is to help with your understanding of some of these 
less known materials. 

Disclaimer: These values have been gleaned from dozens of sources including manufacturer
literature, websites, Machinery Handbook, and others.  They are believe to be correct, we would
not suggest using this information as a sole source for engineering decisions.  Users should
contact specific manufacturers for detailed and specific information for specific materials.

Many manufacturers have substituted other materials for projects that used to call for 
Delrin , they do this because some of these materials are actually better in some 
specification for a job and also many of these materials can offer a more cost effective 
solution.
For us Delrin moves very quickly therefore the price is substantially higher. While 
many of the Nylons' are just as suitable a material for many projects and the cost is 
less.  

For outside applications UV stable HDPE products like King Starboard ,  
Seaboard and others are attracting a lot of attention for its durability and 
ease of fabrication. 

Delrin is a registered trademark of DuPont.

Starboard is a registered trademark of King Plastics
Many have asked about gluing Starboard or other marine HDPE materials. 
Here is a link to some information from King Plastics: http://www.kingstarboard.com/main.php?link=glue.htm

Find more information on getting your own trademarks online.
US Trademark

Hydex is a registered trademark of A. L. Hyde Company

We thank InterState Plastics for much of this information.    

  Properties for clear materials >>>>> go to the far right of the table.  Lexan and Hyzod are polycarbonates.  Perspex, Acrylite, Plexiglas, Polycast and Cyrolite are basically Acrylics. 

      Thermal Forming: here is a basic primer on thermal forming: It is for acrylic but the information is still useful and 
                                                               informative for ABS, Styrene, polycarbonate and others. 
                                                              They seem to move their pages around and break this link. 
                                                                You can go directly to the Bay Plastics Site and hunt if the link does not work. 

We have found another fabrication guide that might be of interest, this one is in PDF format. 
This one is produced and published by 3formtm   http://3-form.com/fabrication_techniques.pdf
3formtm is a company that specializes in textured clear/translucent panels of PETG.  
Their fabrication information is still applicable to other polymer materials.

Specific gravity or whether not something floats in water: water has a specific gravity of 1.0 by definition. 
This is pure H2O at 62 degrees F.  Our density field for the table is in pounds/cubic inch. The density of 
water is 0.036085 pounds per cubic inch.  The estimated density of salt water is 0.0371676 pounds per cubic
inch at 62 degrees F.  If the material in the table is heavier per cubic inch it sinks, and lighter per cubic, inch it floats. 

    HARDNESS SCALE: 

          Adhesives:   We no longer sell any adhesives and have limited personal experience 
                                          using any adhesive, but the link will provide some useful information. 

         Engineering tables:  Stiffness vs Temperature
                                                 Coefficient of Friction
                                                   Wear Resistance

                  Home Page    -    All materials index              

    Styrene Polyphenylene Oxide-Styrene Polyphenylene Oxide-Styrene
30% glass filled
Nylons Polyethylene                       Clear Materials

Property

Units

ABS Another ASTM table for Noryl Nylon MD &
MDS

Nylon 6 or
Nylatron,
Unfilled

Nylon NSM Nylon GSM King
Starboard
Marine
Grade
HDPE UHMW LDPE Polysulfone Polypropylene Delrin
Acetal

Property

PVC
Type 1
Hydex
4101
4101L
PET-P PEEK Teflon

Properties

Properties
for clear
materials
Polycarbonate
aka Lexan,
Hyzod
Perspex Acrylic PALSUN
PALTUF

Polycarbonate
Noryl PPO Noryl 30% glass filled
Water Absorption (24 Hours)
%
0.3 .07 .06 1.2
1.2
.25 1.2 - .03 .01   .30 .008 .25 Water Absorption (24 Hours) .10 .07 .7 .15 - Water Absorption (24 Hours) Water Absorption (24 Hours) .02 .03 .03 .02
Water Absorption (Saturation) % 0.7 .20 - 6.5 9.0 7.0 6.5 -   .01   - - .90 Water Absorption (Saturation) - - .5 - - Water Absorption (Saturation) Water Absorption (Saturation) - - - -
Tensile Strength (73 F)
PSI
6,500 9,600 17,800 12,500
12,400
11,000 12,500 3,800 4,600 4,750     4,800 10,000 Tensile Strength (73 F) 7,000 9,400
7,200L
12,400 14,500 3,350 Tensile Strength (73 F) Tensile Strength (73 F) 10,500 10,000 10,000 65 MPa
Flexural Strength (73 F)
PSI
11,000 13,500 20,000 16,400
14,000
16,000 16,400   1,400 3,500     7,000 14,300 Flexural Strength (73 F) 12,500 - - 24,650 no break Flexural Strength (73 F) Flexural Strength (73 F) 12,000 17,000 17,000  
Compressive Strength
(10% Deflection)
PSI
6,750 - - 10,000
12,000
14,000 10,000   4,570 -   4,000 6,720 18,000 Compressive Strength
(10% Deflection)
10,830 - 15,000 17,000 - Compressive Strength
(10% Deflection)
Compressive Strength
(10% Deflection)
11,000      
Shear Strength (73 F)
PSI
- - - 11,000
9,600
10,000 11,000   3,380 -     5,710 9,500 Shear Strength (73 F) 9,240 - 8,000 7,690 - Shear Strength (73 F) Shear Strength (73 F) 9,200      
Impact Strength, Notched Izod
(73 F)
Ft-Lbs/In.
- 5.0 2.3 .8 - 1.0
1.2
0.5 .8 - 1.0   3 no break   1.2 1.9 1.5 Impact Strength, Notched Izod
(73 F)
1.3 .7 .6 1.6 - Impact Strength, Notched Izod
(73 F)
Impact Strength, Notched Izod
(73 F)
13 .9 .9  

Property

Units

ABS Noryl Noryl 30% glass filled Nylon MD

Nylatron,
Unfilled

Nylon NSM Nylon GSM King
Starboard
HDPE UHMW   Polysulfone Polypropylene Delrin
Acetal

Property

PVC-1 Hydex
4101
4101L
PET-P PEEK Teflon

Properties

Properties
for clear
materials
Polycarbonate
aka Lexan
Perspex Acrylic PALSUN
PALTUF

Polycarbonate
Elongation at Break (73 F)
%
20 30 - 50
90
20 50 >500 55 325     - 60 Elongation at Break (73 F) 25 - 20 50 210 Elongation at Break (73 F) Elongation at Break (73 F) 100 5 5  
Tensile Modulus of Elasticity (73 F)
PSI
320,000 350,000 - 400,000
400,000
410,000 400,000 120,000 170,000 90,000   360,000 190,000 450,000 Tensile Modulus of Elasticity (73 F) 410,000 420,000
380,000L
423,000 580,000 70,000 Tensile Modulus of Elasticity (73 F) Tensile Modulus of Elasticity (73 F) 320,000 -    
Flexural Modulus of Elasticity
(73 F)
PSI
330,000 360,000 1,100,000 400,000
410,000
475,000 400,000 120,000 200,000 110,000   390,000 180,000 425,000 Flexural Modulus of Elasticity
(73 F)
420,000 420,000
390,000L
- 594,500 100,000 Flexural Modulus of Elasticity
(73 F)
Flexural Modulus of Elasticity
(73 F)
375,000 400,000 400,000  
Hardness - Rockwell & Burnell
(73 F)
Various
Scales
R105 R119 L108 R120
R120
R110 R120 68
Shore D
D69 R64   R92 R92 R120 Hardness - Rockwell & Burnell
(73 F)
R112 - M95 R126 R15 Hardness - Rockwell & Burnell
(73 F)
Hardness - Rockwell & Burnell
(73 F)
R118   M-93  
Density
Lbs/cubic In
0.037 .039 .049 0.041
0.0415
0.0415 .0418 .0347 .034 .034     .032 .051 Density 0.053 .0473 .050 .047 .079 Density Density .043 .044 .044 .043
Coefficient of Friction (Dynamic)
None
- .39 - .35
0.35
.18 .35     .12     - .25 Coefficient of Friction (Dynamic) - .25
.11 L
.20 .34 0.07 Coefficient of Friction (Dynamic) Coefficient of Friction (Dynamic) -      
Wear Factor (K)
In-min/
Ft-Lbs-Hr
- - - 8
72
  83     111     - 216 Wear Factor (K) - 210
38 L
67 200 - Wear Factor (K) Wear Factor (K) - -    
Limiting PV
PSI/
 FPM
- - - 3,000
2,700
12,300 3,000     2,000     - 2,700 Limiting PV - 6,000
15,700 L
3,000 20,000 - Limiting PV Limiting PV - -    

Property

Units

ABS Noryl Noryl 30% glass filled Nylon MD

Nylatron,
Unfilled

Nylon NSM Nylon GSM King
Starboard
HDPE UHMW   Polysulfone Polypropylene Delrin
Acetal

Property

PVC-1 Hydex
4101
4101L
PET-P PEEK Teflon

Property

Properties
for clear
materials
Polycarbonate
aka Lexan
Perspex Acrylic PALSUN
PALTUF

Polycarbonate
Abrasion Resistance Index
None
- - - -
54
- -     10     - 137 Abrasion Resistance Index - - - 55 78 Abrasion Resistance Index Abrasion Resistance Index - - - -
Coefficient of Linear Thermal Expansion
In/In/F
4.0x105 3.3x105 1.4x105 5.0x105
5.0x105
5.9x103 5.0x105 1/32" / foot / 40 degrees F. or 6 x 105 1.25x104 7.2x105   3.1 x 105 1.20x104 5.0x105 Coefficient of Linear Thermal Expansion 7.3x105 - - 2.6x105 6.5x105 Coefficient of Linear Thermal Expansion Coefficient of Linear Thermal Expansion 3.9 x 105 1.3 x 104 1.3 x 104  
Continuous Service Temperature - in Air (max.)
F
185 220 220 212
212
200 212 160 180 160     - 180 Continuous Service Temperature - in Air (max.) 160 221 212 480 500 Continuous Service Temperature - in Air (max.) Continuous Service Temperature - in Air (max.) 475 180 180 248
Deflection Temperature (264 PSI)
F
220 265 265 200
194
200 200   151 116   345 - 260 Deflection Temperature (264 PSI) 154 200 215 320 115 Deflection Temperature (264 PSI) Deflection Temperature (264 PSI) 539 - - 266
Melting Point
F
- 310 310 430
491
420 430 250   -     - 347 Melting Point 360 - 491 640 621 Melting Point Melting Point - - - -
Deformation Under Load
(2000 PSI, 122 F)
%
- - - .75
2.0
- .75     7     - .60 Deformation Under Load
(2000 PSI, 122 F)
- - - - 5 Deformation Under Load
(2000 PSI, 122 F)
Deformation Under Load
(2000 PSI, 122 F)
- - - -
Dielectric Strength
Volts/
Mil
450 500 530 550
400
- 550   500 -   425 - 380 Dielectric Strength 552 - 385 - - Dielectric Strength Dielectric Strength 840      

Property

Units

ABS Noryl Noryl 30% glass filled Nylon MD

Nylatron,
Unfilled

Nylon NSM Nylon GSM King
Starboard
HDPE UHMW   Polysulfone Polypropylene Delrin
Acetal

Property

PVC-1 Hydex
4101
4101L
PET-P PEEK Teflon

Property

Properties
for clear
materials
Polycarbonate
aka Lexan
Perspex Acrylic PALSUN
PALTUF

Polycarbonate
Dielectric Constant (1 kHz)
None
2.87 - - 3.7
4.1
- 3.7     -     - 3.7 Dielectric Constant (1 kHz) - - - - - Dielectric Constant (1 kHz) Dielectric Constant (1 kHz) 4.4 3 3  
Dielectric Constant (1 MHz)
None
- - - 3.7
4.0
- 3.7     -     - 3.7 Dielectric Constant (1 MHz) - - - - - Dielectric Constant (1 MHz) Dielectric Constant (1 MHz) 4.2 3 3  
Dielectric Constant (60 Hz)
None
- 2.7 3.2 3.7
3.4
- 3.7   2.65 2.3   3.15 2.3 3.7 Dielectric Constant (60 Hz) 4.0 - 3.3 3.3 - Dielectric Constant (60 Hz) Dielectric Constant (60 Hz) - 3 3  
Volume Resistively Ohm-CM   10-17 10-17          
1x1015
      1x1017   Volume Resistively           Volume Resistively Volume Resistively 6 x 1016 - -  
                                              Light
Transmittance
%
91 92 92 89
                                              Refractive
Index %
- 1.49 1.49 -
                                              Properties
for clear
materials
Polycarbonate
aka Lexan
Perspex Acrylic PALSUN
PALTUF

Polycarbonate
                                              Haze % - 5 5  
                                              Haze 24 days
@ 104oF
- - -  
                                              Self Ignition
Temp.
- 830 830  
                                              Flammability
burn rate
1/8" thick
inch/min
- 1.0 1.0  
                                              Forming Temp - 300 300  
                                              Specific
Gravity
    1.19 1.2