History of the discovery of fehraly. Physical and mechanical properties.

Relevance

Heat-resistant alloys of chromium and nickel - nichromes with high electrical resistance are indispensable in modern electrical engineering. Almost the only disadvantage of these alloys is their high cost. In order to make it cheaper, nickel in the alloy was partially replaced with iron. The most successful was a composition containing 15% Cr, 60% Ni, and 25% Fe. The alloy was called ferronichrome. It combines high electrical resistance (1.05-1.40 Ohmm2/m) with high heat resistance. It is used in the manufacture of high-temperature electric heaters.

Composition

The name "Fehral" is composed of the names of its constituent parts: ferum - "Fe", chromium - "Chr", aluminum - "Al". The alloy is based on iron. Its share in the alloy, as a rule, is over 70%. The alloy is further alloyed with manganese, silicon, and possibly with nickel.

The alloy Si C Cr Mn Fe Al Ti Ni
X23YU5T ≤0.50 ≤0.05 22.0-24.0 ≤0.30 basis 5.00-5.80 0.2-0.5 ≤0.60
X23U5 ≤0.60 ≤0.05 21.5-23.5 ≤0.30 basis 4.60-5.30 0.15-0.40 ≤0.60
X13Y4 ≤0.70 ≤0.08 13.5-15.5 ≤0.70 --- "--- 4.00-5.50 0.2-0.6 ≤0.60
X15U5 ≤0.70 ≤0.08 14.5-15.5 ≤0.70 basis 4.50-5.50 0.2-0.6 ≤0.60

Each alloy grade has an international analogue.

Name AISI / Grade UNS GOST DIN / Werkstoff
Kathal APM CrAl 25 5 92 500 X23YU5T 1.4765
Alkrothal 14 CrAl 14 4 K91670 X15YU5 1.4725
Kanthal D CrAl 20 5 K92400 X23SY5 1.4767

Physical properties

Alloy X15YU5 X13Ю4 X23YU5T X23YU5
Elongation at break (%) '12 '12 '12 '12
Tensile strength N/mm2 590-690 580-680 630-780 630-780
Density g/cm3 7.15 7.40 7.25 7.25
Maximum continuous operating temperature (°C) 750 650 1250 1250
Electrical resistivity (Ωmm2/m) 1.30 ±0.05 1.25 ±0.05 1.35 ±0.05 1.35 ±0.05
Melting temperature (°C) 1500 1450 1500 1500
Thermal conductivity (KJ/m*h*°C) 52.4 52.7 60.2 60.2
Lifetime, h '4 000 580-680 '4 000 '4 000

The supplier

The supplier Evek GmbH offers to buy fahl, the price is optimal in the given product segment. We offer to buy fahl from the specialized stocks of Evek GmbH with delivery in any city. Full compliance with the modern standards of quality. Timely delivery is ensured by representations in cities in Eastern Europe.

Buy, low price

Supplier Evek GmbH offers to buy Fechral, price - due to technological features of production without including additional costs. The supplier Evek GmbH has posted information on the latest product arrivals on their website. Always available in precision alloys, price - optimal from the supplier.