Home
/ Sheet / Coated
Sheet / ACRYLUME® / Application
Considerations
Coated Sheet
ACRYLUME® Sheet
Application Considerations
Properties of the Base Steel
U. S. Steel ACRYLUME® steel sheet is available in the same
steel designations as GALVALUME® steel sheet.
 |
Commercial Steel (CS) |
|
Forming Steel (FS) |
|
Drawing Steel (DS) |
|
High Temperature Steel (HTS) |
|
Structural Steel (SS) |
ASTM References
These designations are defined in ASTM Specification A792. The
following two tables provide details about the strength levels
and formability attributes for these designations as presented
in ASTM A792.
|
Typical Ranges of Mechanical Properties* |
|
Yield
Strength |
Elongation |
R |
N |
| Designation |
ksi |
MPa |
in
2 in, % |
Value |
Value |
|
CS Type B
|
35/60
|
245/410
|
> / = 20
|
A
|
A
|
|
FS
|
25/40
|
170/275
|
> / = 24
|
1.0/1.4
|
0.16/0.20
|
|
DS
|
20/35
|
140/240
|
> / = 30
|
1.3/1.7
|
0.18/0.22
|
|
HTS
|
30/65
|
205/450
|
> / = 15
|
A
|
A
|
| *The typical mechanical property values
presented in this table are non-mandatory. They are
intended to provide the purchaser with as much
information as possible to make an informed decision on
the steel to be specified. Values outside of these
ranges may occur. |
A - No typical properties have been established.
|
Structural Steel Mechanical Property Requirements |
| Grade |
Yield
Strength
Minimum, ksi |
Tensile
Strength
Minimum, ksi |
Elongation
in 2 inches, min |
|
33
|
33
|
45
|
20
|
|
37
|
37
|
52
|
18
|
|
40
|
40
|
55
|
16
|
|
50 Class 1
|
50
|
65
|
12
|
|
50 Class 2
|
50
|
. . . . .
|
12
|
|
80 A
|
80B
|
82
|
. . . . .
|
Where an ellipsis (. .
. .) appears in the table, there is no requirement.
A - For sheet thickness of 0.028 and thinner, no tension
test is required if the hardness result is Rockwell B 85
or greater.
B - As there is no discontinuous yield curve, the yield
strength should be taken as the stress at 0.5%
elongation under load or 0.2% offset. |
Coating Thickness
The coating weight categories for the metallic coating are the same as those for the GALVALUME® steel sheet. The use of AZ55 or AZ50 should be decided on the same basis for regular GALVALUME® Steel sheet.
Surface Finish
The surface finish of ACRYLUME® steel sheet is basically unchanged from the typical appearance of the GALVALUME® coating since the acrylic film is clear. If anything, the appearance is somewhat satiny (less metallic gloss) especially when viewed at an oblique angle. The GALVALUME® steel sheet is typically not temper rolled prior to applying the acrylic film; thus, the normal small-spangle finish of GALVALUME® steel sheet is visible.
Surface Treatment
The acrylic coating on ACRYLUME® steel sheet does not require the use of any other surface treatment. The acrylic film offers the combined benefit of high resistance to storage staining and the lubricating effect of oil. The product is specifically not intended to be oiled when used for roofing, siding and decking. The absence of an oil provides improved worker safety.
ACRYLUME® steel sheet is only available with no additional surface treatments.
Corrosion Performance
The results of accelerated-corrosion tests show the superiority of ACRYLUME® steel sheet when compared with today's conventional chemically-treated GALVALUME®.
Wet Stack Test
 |
Designed to
simulate storage of sheets in either a coil
form or as a stacked bundle at the jobsite |
|
Test
samples stacked tightly in a bundle. Wetted
between the individual panels every 2 days
with deionized water. |
|
Tested at
100°F for 750 hours. |
|
Hours
in
Test |
ACRYLUME |
CT
1* |
CT
2* |
|
250
|
Light haze
|
Light
surface
spots
|
Dark black spots & edges
|
|
500
|
Light haze
|
Light
surface
patches
|
Heavy black patches
|
|
750
|
Light haze
|
Uniform
surface
darkening
|
Heavy, dark black
patches
|
Water Immersion Test
| |
Designed
to stimulate ponding of water on a low slope
roof |
|
Samples
immersed in deionized water |
|
Water
temperature - 100°F |
|
Hours
in
Test |
ACRYLUME® |
CT
1* |
CT
2* |
|
500
|
Slight dulling
|
Initial dark
spots
|
Dark patches
|
|
1000
|
White patches
with dark edges
|
Dark & light
stains
|
Completely blackened
|
|
2000
|
White surface,
dark edges
|
Dark stains
|
Completely blackened
|
Salt Spray Test
|
Tested
per ASTM B117. |
|
5%
salt solution. |
|
30-day
test duration. |
|
Time
in
Test |
ACRYLUME® |
CT
1* |
CT
2* |
|
250 Hours
|
No activity
|
White haze
with small
black spots
|
White haze with small black spots
|
|
500 Hours
|
Tiny spots,
evidence of
initial activity
|
White haze
with black
streaks
|
Uniform haze with black streaks
|
|
720 Hours
|
Small spots
with local light
streaks
|
Light haze
with dark
spots
|
Dark haze with dark spots
|
| *CT 1 and CT 2 are two different
conventional chemical treatments |
|
