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Classifications

Flammability classes

The classification of the ignition and burning resistance characteristics of materials other than metal or ceramic:

ClassificationV-0V-1V-2
Number of flame applications per sample2 x 102 x 102 x 10
Maximum burning time of one sample? 10? 30? 30
Maximum burning time of five samples? 50? 250? 250
Allowable dripping and subsequent
ignition of cotton below
NoNoYes
Allowable afterglow remaining for:? 30? 60? 60

HB – Slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm.

Impact classification

ClassificationImpact energy (J)Equivalent mass (kg)Height mm (± 1%)
Very light0.50.25200
Light10.25400
Medium20.5400
Heavy51.7300
Very heavy205400

Corrosion resistance

ClassificationTypical usageMean zinc
layer thickness
(?m)
Minimum zinc
layer thickness
(?m)
Salt spray
duration
(h)
LowIndoor, dry
locations
53.524
HighOutdoor, wet
locations
2518192

11.2 Resistance to corrosion (IEC 61914) 

‘Stainless Steel containing at least 16% chromium need not be tested and are assumed to meet the classification for high resistance to corrosion.’