Questions & Answers
Niobium circle grades
The wheels are made from the following grades of niobium and alloys: R04251, R04210, R04200, Nb2, Nb1.
Niobium Circle Standards
International standards:
ISO 9001 — Quality control of production;
ISO 6892-1 — Tensile testing of metals.
Niobium Wheel Weight Chart
| Diameter, mm | Weight of 1 m, kg |
| 5 | 0.168 |
| 6 | 0.242 |
| 8 | 0.431 |
| 10 | 0.673 |
| 12 | 0.969 |
| 14 | 1.319 |
| 16 | 1.724 |
| 18 | 2.182 |
| 20 | 2.693 |
| 25 | 4.208 |
| 30 | 6.059 |
| 35 | 8.247 |
| 40 | 10.77 |
| 45 | 13.63 |
| 50 | 16.83 |
| 60 | 24.24 |
| 70 | 32.98 |
| 80 | 43.08 |
| 90 | 54.53 |
| 100 | 67.3 |