New nichrome
| Alloy Brand | Percent composition | |||||
|---|---|---|---|---|---|---|
| Ni | Mn | Cr | Si | C | Fe | |
| X20H30 OCr20Ni30 | From 30.0 — 31.0 | Not higher than 60 | From 19.5 — 21.5 | From 1.0 — 1.5 | Not higher than 0.6 | Ost |
| X20H35 OCr20Ni35 | From 34.0 -37.0 | Not higher than 60 | From 19.5 to 21.5 | From 1.0 — 1.5 | Not higher than 0.6 | |
| X30N70 OCr30Ni70 | Rest | Not higher than 60 | From 28.0 to 31.0 | From 1.0 — 1.5 | Not higher than 0.6 | ≤1.00 |
| Characteristics of alloys | |||||||
|---|---|---|---|---|---|---|---|
| Alloy | X20H35 | X20N30 | ХН70Ю | ||||
| Elongation at break (%) | Over 20 | Over 20 | Over 20 | ||||
| Strength tensile strength N / mm2 | From 630−780 | From 630−780 | From 637−784 | ||||
| Density g / cm3 | 7.9 | 7.9 | 8.1 | ||||
| Maximum t ° continuous operation | 1100 ° C | 1100 ° C | 1250 ° C | ||||
| Specific electr. Resistance (Ωmm2 / m) | 1.00 | 1.04 | 1.18 | ||||
| Melting temperature | 1390 ° C | 1390 ° C | 1380 ° C | ||||
| Linear extension. Coefficient (αx10−6 / ° C) | 19 | 19 | 17th | ||||
| Thermal conductivity | 43.7 | 43.7 | 45.2 | ||||
| Service life, hours | > 4 thousand. | > 4 thousand. | > 4 thousand. | ||||