
0Cr21Al4 Ferro Chromium Aluminium Alloy High Heating Resistance
Alloy Rod/ Bar
Description
Product forms and size range
Round wire
0.010-12 mm (0.00039-0.472 inch) other sizes are available on
request.
Ribbon (flat wire)
Thickness: 0.023-0.8 mm (0.0009-0.031 inch)
Width: 0.038-4 mm (0.0015-0.157 inch)
Width/thickness ratio max 60, depending on alloy and tolerance
Other sizes are available on request.
Resistance electric heating wire has strong antioxidant properties,
but a variety of gases in furnaces such as air, carbon, sulfur,
hydrogen and nitrogen atmosphere, still have a certain impact on
it.
Although these heating wires all have had antioxidant treatment,
the transportation, winding, installation and other process will
cause damage to a certain extent and reduce its service life.
In order to extend the service life, customers need to do pre
oxidation treatment before using. The method is to heat alloy
elements which have installed completely in the dry air to the
temperature (lower 100-200C than its maximum using temperature),
heat preservation for 5 to 10 hours, then cooling slowly with
furnace.
Features and advantages
1. High using temperature, the maximum using temperature can reach
1400C (0Cr21A16Nb, 0Cr27A17Mo2, etc.)
2. Low temperature coefficient of resistance
3. Lower thermal expansion coefficient than the Ni-base
super-alloys.
4. High electrical resistivity
5. Good corrosion resistance under high temperature, especially
under the atmosphere containing sulfides
6. High surface load
7. Creep-resistant
8. Lower raw-material cost, Lower density and cheaper price
compared with Nichrome wire.
9. Superior oxidation resistance at 800-1300ºC
10. Long service life
Main characteristics of Fe-Cr-Al- high resistances electric heating
alloys
Brand name | 1Cr13Al4 | 0Cr25Al5 | 0Cr21Al6 | 0Cr23Al5 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 | |
Main chemical composition% | Cr | 12.0-15.0 | 23.0-26.0 | 19.0-22.0 | 22.5-24.5 | 18.0-21.0 | 21.0-23.0 | 26.5-27.8 |
Al | 4.0-6.0 | 4.5-6.5 | 5.0-7.0 | 4.2-5.0 | 3.0-4.2 | 5.0-7.0 | 6.0-7.0 | |
RE | opportune amount | opportune amount | opportune amount | opportune amount | opportune amount | opportune amount | opportune amount | |
Fe | Rest | Rest | Rest | Rest | Rest | Rest | Rest | |
Nb0.5 | Mo1.8-2.2 | |||||||
Max.continuous service temp.of element (ºC) | 950 | 1250 | 1250 | 1250 | 1100 | 1350 | 1400 | |
Resistivity μΩ.m,20ºC | 1.25 | 1.42 | 1.42 | 1.35 | 1.23 | 1.45 | 1.53 | |
Density (g/cm3 ) | 7.4 | 7.10 | 7.16 | 7.25 | 7.35 | 7.10 | 7.10 | |
Thermal conductivity KJ/m.h.ºC | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | 45.2 | |
Coefficient of lines expansion α×10-6/ºC | 15.4 | 16.0 | 14.7 | 15.0 | 13.5 | 16.0 | 16.0 | |
Melting pointºC | 1450 | 1500 | 1500 | 1500 | 1500 | 1510 | 1520 | |
Tensile strength Mpa | 580-680 | 630-780 | 630-780 | 630-780 | 600-700 | 650-800 | 680-830 | |
Elongation at rupture % | >16 | >12 | >12 | >12 | >12 | >12 | >10 | |
Variation of area % | 65-75 | 60-75 | 65-75 | 65-75 | 65-75 | 65-75 | 65-75 | |
Repeat bending frequency(F/R) | >5 | >5 | >5 | >5 | >5 | >5 | >5 | |
Hardness(H.B.) | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | |
Micrographic structure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | |
Magnetic properties | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic |
Fe-Cr-Al alloy wires are made of iron chromium aluminum base alloys
containing small amounts of reactive elements such as yttrium and
zirconium and produced by smelting, steel rolling, forging,
annealing, drawing, surface treatment, resistance control test,
etc.
The high aluminum content, in combination with the high chromium
content let the scaling temperature can reach to 1425ºC (2600ºF);
Fe-Cr-Al wire was shaped by means of high speed automatic cooling
machine of which the power capacity is controlled by computer, they
are available as wire and ribbon(strip).
Application
Our products (FeCrAl) high resistance electric heating wire
materials are salable and widely used for making heating equipment
like industrial furnace, civil heating appliance, various
electrical resistors and locomotive braking resistor, infrared
equipment, liquefied gas infrared heat-resisting net, different
kinds of igniting and radiating electrodes and voltage-regulating
resistors for motors and so on in Metallurgical machinery, medical,
chemical, ceramics, electronics, electrical appliances, glass and
other civil or industrial fields.
Our Services
1. For all your requirements about us or your requiry, we will
reply your details within 24 hours.
2. We have a good service, friendly sales and service who can speak
fluente English language.
3. We provide OEM service, you can customize the retail box packing
and other things
4.We have experienced engineers rhat can help you make better uses
of the product.
Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribbon wire, sheet, tape, strip, rod and plate.
We’ve already got ISO9001 quality system certificate and approval of ISO14001 environmental protection system.
We own a complete set of advanced production flow of refining, cold reduction, drawing and heat treating etc. We also proudly have independent R&D capacity.
Shanghai Tankii Alloy Material Co., Ltd has accumulated lots of experiences over forty years in this field. During forty years, hundreds of management elites and high science and technology talents were employed.They participated in every walk of the company life, which make our company keep blooming and invincible in the competitive market.
Based on the principle of “first quality, sincere service”, our managing ideology is pursuing technology innovation and creating the top brand in the alloy field. We persist in Quality - the foundation of the survival. It is our forever ideology to serve you with full heart and soul. We committed to provide customers all over the world with high-quality, competitive products and perfect service.
Our products, such us nichrome wire, nichrome strip, fecral wire, fecral strip, thermocouple wire, nickel wire, nickel strip have been exported to Europe, USA, India, Southest Asia, South America,etc.
We are willing to establish strong and long-time partnership with our customers