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83A - FDA Approved
88A - FDA Approved
83AUV - UV Resistant
83ASD - Static Dissipative
92AX - FDA Approved
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  Pyrathane® Material Comparisons

  Best All-Around Materials Materials For Special Applications
Designation 83A 88A 92A 70A 83ASD 83AUV 90ASD 92AX
Recommended Initial Stretch 10% 10% 7.5% 15% 12.5% 12.5% 7.5% 5%
Shore A Hardness (ASTM D 2240 or ISO 868) 85±3 88±3 92±3 70±3 82±3 85±3 90±3 92±3
Ultimate Tensile Strength In PSI (ASTM D 412 or ISO 527) 5000 6000 6000 3100 4300 5500 3800 4400
Ultimate Elongation in % (ASTM D 412) 500 500 450 765 670 500 450 Not Available
Tensile Stress In PSI (ASTM D 412 or ISO 527)
At 100% Elongation
At 300% Elongation
at 5% - 400
at 10% - 600
Tear Strength, Die "C" in lbf/in
(ASTM D 624, 646 or ISO 34-1)
500 600 775 380 370 500 Not Available 560
Temperature Range -10° to +150° F (-23.3° to +65.6° C) -40° to +200° F (-40° to +93.3° C)
Advantages High co-efficient of friction, excellent flex life and abrasion resistance Higher torque carrying capacity, higher abrasion resistance and higher modulus Higher torque carrying capacity and higher modulus Lively rubber-like properties Static dissipative Resistance to ultraviolet light and very high humidity Permanently static dissipative (independent of humidity level) and ultra-clean (low off-gassing, low contamination) Greater temp range and wider chemical resistivity
(relative to our 83A material)
- Lower coefficient of friction Shorter flex life and lower co-efficient of friction Lower torque carrying capacity and abrasion resistance Slightly lower modulus and abrasion resistance Slightly lower modulus and lower tensile strength Slightly lower tensile strength Poor abrasion resistance
FDA Compliance 1680 & 2600 - - - 1680

We find that in most applications the 83A Pyrathane® is most suitable because of its high co-efficient of friction, excellent flex life and reasonable cost. However, in special applications where static dissipation, ultraviolet light resistance, softer feel or higher co-efficient of friction are required one of our other materials may be more suitable.

This data is provided for general information and material comparison. The potential user should perform tests to determine the product's performance and suitability in the intended application. Final determination of the fitness of the product for any particular use is the responsibility of the buyer.
Pyramid Incorporated • 522 N 9th Ave E • PO Box 200 • Newton, IA 50208-0200