RESISTORS FOR INDUSTRIAL ELECTRIC FURNACES

To complete the range of technical elements
concerning the industrial furnaces, metallurgy
and high temperatures fields, in May
2004 SIM S.r.l. acquired and incorporated
ELETTROMECCANICA C.D.M., a Company
specialized in the marketing of wires and
metal straps for electrical resistors and in the
production of finished electrical resistors and
heating elements.

The acquisition allowed us to establish a
specialized workshop for the production of
electrical resistors, with or without t-weld, of
the terminal element (cold part), thread and
drilling of the terminal element, according to
specific customer’s requirements.
We have also equipped a lab for the quality
control of both the incoming wire and the
outcoming finished product.
The main controls we make are:
– Electrical resistor control (ohm/mt.) through a
specific measurement bridge equipped with a
digital micro-hommeter;
– Diameter and ovality control, through
thousandth-micrometer with comparator;
– Visual control of surface-appearance and of
the winding;
– Possibility of comparison of the producer’s
chemical analysis with our external certified
lab.

 

MAIN ALLOYS WE DEALT

The main alloys we dealt with are:

NICRO = Nichel / Chromium
splitted in

NICRO 80 = Ni.80% – Cr.20% alloy. It is the best and most valuable alloy of its
class, useful for resistors working at high temperature (1,200 °C).

NICRO 70 = Ni.70% – Cr.30% alloy. (Max. T. 1,250 °C)

NICRO 60 = Ni.60% – Cr.15% alloy. Excellent for heating elements working at
1,100 °C temperature.

NICRO 40 = Ni.37% – Cr.20% – Si.2% alloy. Useful for the production of driers
where the temperature of use does not exceed 1,050 °C.

NICRO 30 = Ni.28% – Cr.20% – Si.2% alloy. Useful for the production of driers
where the temperature of use does not exceed 950°C.

 

FECRAL = Iron / Chromium / Aluminium
splitted in

FECRAL 153 = ferromagnetic alloy for 1,450 °C temperature-use.
Enriched with Yttrium, Zirconium and Nickel.

FECRAL 145 = ferromagnetic alloy for 1,350 °C temperature-use. Its best use is in
heat-treating furnaces.

FECRAL 139 = alloy useful for heating elements in industrial furnaces needing high
surface loading. T. of use: 1,300 °C.

FECRAL 137 = projected as heating element in ceramic furnaces, for the production
of armored resistors and resistors put in quartz tubes.
T. of use: 1,280 °C.

FECRAL 127 = alloy for low-temperature-resistors (1,050 °C) used in heating
elements working in air or inside quartz/alumina tubes.

Warehouse for Resistors Alloys:

Electric Resistors Production and Mechanical Working Department:

Examples of resistors of our production

Assembled on insulating fiber

Examples of resistors of our production

Assembled on ceramic supports (tubes and supporting resistors plates)

Examples of resistors of our production

Tubular resistors

Examples of resistors of our production

Exposed-wire-wound resistors

Examples of resistors of our production

Semi-embedded resistors on iron-removed ceramic support

Examples of resistors of our production

Armored and Finned Resistors