14.00 Cr, 4.00 Al, Bal. Fe
Maksimal doimiy ish harorati: 950ºC.
Erish harorati: 1450ºC
Elektr qarshiligi: 1,25 ohm mm2/m
Sanoat pechlarida va elektr pechlarida isitish elementlari sifatida keng qo'llanilgan.
Tophet qotishmalariga qaraganda kamroq issiqqa chidamlilikka ega, ammo erish nuqtasi ancha yuqori.
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XITOYDA ALCHROM QO'SHIMCHALARI ISHLAB CHIQARUVCHI
| Fe-Cr-Al qarshilik qotishmasining kimyoviy tarkibi va asosiy xususiyati | ||||||||
| Xususiyatlar \ Darajasi | 1Cr13Al4 | 0Cr25Al5 | 0Cr21Al6 | 0Cr23Al5 | 0Cr21Al4 | 0Cr21Al6Nb | 0Cr27Al7Mo2 | |
| Asosiy kimyoviy tarkibi (%) | 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 | qulay | qulay | qulay | qulay | qulay | qulay | qulay | |
| Fe | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | |
| Nb0.5 | Dushanba 1.8-2.2 | |||||||
| Maksimal uzluksiz xizmat ko'rsatish harorati (oC) | 950 | 1250 | 1250 | 1250 | 1100 | 1350-yil | 1400 | |
| Qarshilik 20oC (Ωmm2/m) | 1.25 ±0.08 | 1.42 ±0.06 | 1.42 ±0.07 | 1.35 ±0.07 | 1.23 ±0.07 | 1.45 ±0.07 | 1.53 ±0.07 | |
| Zichlik (g/sm3) | 7.4 | 7.1 | 7.16 | 7.25 | 7.35 | 7.1 | 7.1 | |
| Issiqlik o'tkazuvchanligi | 52.7 | 46.1 | 63.2 | 60.2 | 46.9 | 46.1 | 45.2 | |
| (KJ/m@h@oC) | ||||||||
| Issiqlik kengayish koeffitsienti (α×10-6/oC) | 15.4 | 16 | 14.7 | 15 | 13.5 | 16 | 16 | |
| Taxminiy erish nuqtasi (oC) | 1450-yil | 1500 | 1500 | 1500 | 1500 | 1510-yil | 1520-yil | |
| Cho'zilish kuchi (N/mm2) | 580-680 | 630-780 | 630-780 | 630-780 | 600-700 | 650-800 | 680-830 | |
| Uzayish (%) | >16 | >12 | >12 | >12 | >12 | >12 | >10 | |
| Bo'lim o'zgarishi | 65-75 | 60-75 | 65-75 | 65-75 | 65-75 | 65-75 | 65-75 | |
| Qisqarish darajasi (%) | ||||||||
| Qayta-qayta egilish chastotasi (F/R) | >5 | >5 | >5 | >5 | >5 | >5 | >5 | |
| Qattiqlik (HB) | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | 200-260 | |
| Uzluksiz xizmat ko'rsatish vaqti | no | ≥80/1300 | ≥80/1300 | ≥80/1300 | ≥80/1250 | ≥50/1350 | ≥50/1350 | |
| Mikrografik tuzilish | Ferrit | Ferrit | Ferrit | Ferrit | Ferrit | Ferrit | Ferrit | |
| Magnit xususiyati | Magnit | Magnit | Magnit | Magnit | Magnit | Magnit | Magnit | |




