... the industries of magnet, ceramics, power metallurgy, glass, and meallurgy.3)Character: Higher temperature, antioxidation, anticorrosion, increasing temperature fast, low coefficient ... .520200-800250-600700-20000.6-6.054600-2500300-2501200-40000.3-3.025200-1200250-700700-26000.4-5.0 5)Our products ... or resistance increased too much, akk heater should be changed. U Type Silicon Carbide Heating Element