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.
