ZZ-T-391E
The physical properties of tread types I, II and III tires
Tread
Composition.
3.2.1
Physical
property
examinations
permissible
values
shall be in accordance with
Table I.
shall also be in accordance
with Table I.
Table
I
T y p e s I and II
Original
properties:
65 ± 10
H a r d n e s s - Durometer
A
3.6.4
2000 p.s.i.
(min.)
3.6.5
Tensile
strength
200 percent
(min.)
3.6.5
Elongation
Type III
Original
properties:
75
+
20
-
Durometer
A
3.6.4
Hardness
-
10
Tensile
strength
3800 p.s.i. (min.)
3.6.5
300 percent (min. )
3.6-5
Elongation
Types
I,
II,
and
III
Change
from
original
value
after
3.6.6
accelerated aging for 70 hours
at 158° ± 20°F.
+5
3.6.4
H a r d n e s s - Durometer
3.6.5
-15
percent
Tensile
strength
3.6.5
-25
percent
Elongation
Materials shall be as specified herein.
Material
not
specified
shall
Materials.
3.3
as being compatible with the intended use in accordance with
be
selected
by
the
supplier
The
engineering
and
production standards of the industrial tire and wheel industry.
tire and applicable band, wheel, or rim shall be new, except as s p e c i f i e d
herein.
The
elastomer
for
the
tires shall be of any suitable
3.3.1 E l a s t o m e r
Composition.
p o l y m e r that conform to the requirements of
this
specification.
The
hi-load
designated
load carrying capacity elastomer such as
tires (type III) shall be made of a high
polyurethane
or
the
equivalent.
Unless
otherwise s p e c i f i e d (see 1.2.2), code red, universal
Compound
Code
Tires.
3.4
s e r v i c e tires shall be furnished and shall be in accordance with requirements (a) below.
When one or more of the other compound code tires cited in 1.2.2 are specified, these
tires shall be in accordance with the following minimum requirements (b) through (h):
-
Universal
service.
Code
red
industry
standard
tire
inherently
capable
of
(a)
temperatures ranging from +125° to
p e r f o r m a n c e in
ambient
air
-40°F.
standard
low
power
consump-
Industry
- Lower power
consumption.
Code
blue
(b)
t i o n tire.
(c)
The swell
volume increase of
the tire shall
not
O i l resisting.
Code
yellow
-
exceed 20 percent of the
original dimensions
when tested as
s p e c i f i e d in 3.4.2.
These
tires shall be
to have a dc
compounded
Code
white
- Static
conductive.
(d)
resistivity
not e x c e e d i n g
1 million ohm
centimeters
when tested
as specified in 3.4.3.
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