Rechercher

Miscellaneous conversion factors

Miscellaneous conversion factors To convert from To Multiply by BTU Kilo-calorie 0.25200 BTU Foot-pound 778.17 BTU Joules 1054.0 BTU Kilowatt-hour 0.00029307 Calorie Joule 4.1840 Centigrade Fahrenheit (1.8 x °C) + 32 Circular mil Square centimeter 0.000005067 Circular mil Square inch

Symbols, formulas and definitions

List of symbols     Unit for calculations Symbol Meaning Metric Imperial Ac Surface area of heating conductor cm2 in2 b Width (ribbon or strip) mm in Ct Temperature factor (ratio of resistivity at operating temperature to resistivity at room temperature)     d Wire diameter mm

Tubothal®

TUBOTHAL® – THE MOST POWERFUL METALLIC ELEMENT SYSTEM Tubothal® is an ideal electric element used in combination with powder metallurgy tubes because of its great advantages, such as – very high power – long life – low weight – easy to design to existing power controls and supply. Combined

Key data for Kanthal® elements

Wire elements Element systems Spiral Spiral Porcupine Rod over bend Corrugated Looped Supports Ceramic tubes Grooves Ceramic tubes Metallic rods Metallic staples Ceramic tubes Material Sillimanite Chamotte grade 28 Sillimanite Kanthal® APM U-shaped Kanthal® nails Sillimanite Max.

Operating life and maximum permissible temperature

When heated, resistance heating alloys form an oxide layer on their surface, which prevents further oxidation of the material. To accomplish this function the oxide layer must be dense and resist the diffusion of gasses. It must also be thin and adhere to the metal under temperature

Stranded resistance heating wire

Recognizing the need for more precisely controlled stranded wire within the heat treatment industry and working closely with our cable customers, Kanthal has developed a range of stranded resistance wires in the well known Nikrothal®, Kanthal® and nickel alloys. Content: Strand diameter

Copper-nickel alloys

COPPER-NICKEL (CuNi) ALLOYS Copper-nickel (CuNi) alloy Cuprothal® 49 (universally known as Constantan) is manufactured under controlled conditions from electrolytic copper and pure nickel. Cuprothal® 49 has a number of special characteristics – some electrical, some mechanical – which

Nickel-iron alloys

NICKEL-IRON (NiFe) ALLOYS Nickel-iron (NiFe) alloys for up to 600°C (1110°F): Nifethal® 70 and Nifethal® 52 are alloys with low resistivity and high temperature coefficient of resistance. The positive temperature coefficient allows heating elements to reduce power as temperature

Kanthal GmbH - Once again awarded the audit berufundfamilie certificate

Kanthal GmbH awarded the audit berundfamilie certificate for its sustainable human resources policy.