Increased Strength
the strength of steel.
Strong as steel.
The stainless steel core in CopperPlus gives it a serious strength advantage over plain copper. For example, CopperPlus can be used at thinner gauges than ordinary copper, while at the same time providing improved mechanical performance. It can withstand high wind loads and heavy hail. And there’s less “oil canning” (buckling). Thinner. Stronger. Better. All big plusses for CopperPlus.
When 0.012” thick CopperPlus was tested according
to Underwriters Laboratories’ test standard UL 2218 for “Impact Resistance
of Roofing Materials,” it achieved a “Class 4” rating, the highest
possible classification. In 22 states and provinces in the U.S. and
Canada, roofs with this rating can qualify for a substantial insurance
premium discount.
Property |
Copper-Clad 430SS O60: soft |
ASTM B370 Copper H00: ⅛ hard |
ASTM B370 Copper H01: ¼ hard |
Yield Strength [MPa] |
276 | 193 | 207 |
Ultimate Tensile Strength [MPa] |
414 | 248 | 262 |
Elongation in 50 mm [%] |
32 | 30 | 25 |
Density [g/cm³] |
7.95 | 8.94 | |
Modulus of Elasticity [GPa] |
186 | 117 | |
Coefficient of Thermal Expansion [µm/m·°C] |
11.0 | 16.9 | |
Thermal Conductivity [W/m·°C] |
64 | 391 | |
Mechanical properties for CopperPlus, and some of the typical copper alloys that are used as copper architectural strip, which conform to ASTM B370.
Copper data from Copper Development Association database (www.copper.org).