Questions & Answers
Metal grades of ligatures
The ligature is available in the following grades and alloys: TiAl, NiCr, CoCr, CoAl, NiMo, NiB, NiMg15, CuSi3, CuMn12, CuP10, FeTi30, FeW70, FeMo60, FeV50, FeCr60–70, FeSi75, FeMn78, AlZr5, AlSi20, AlMn10, AlCu50, AlSr10, AlB3, AlTi10, AlTi5B1.
Ligature standards
GOST standards:
GOST 6008-90 - Ferrochrome;
GOST 4761-91 - Ferrosilicon;
GOST 4759-91 - Ferromanganese;
GOST 14117-85 - Ferroalloys;
GOST 3221-85 - Cast aluminum alloys;
GOST 13938.1–13938.12 - Methods of chemical analysis of non-ferrous metals;
GOST 7727-81 - Spectral analysis of metals;
GOST 15849-70 - Sampling rules;
GOST 24231-80 - Preparation of non-ferrous metal samples.
Ligature weight table
| Ligature type | Composition example | Density (g/cm³) | 1 cm³ |
| Al–Ti–B | AlTi5B1 | 2.6–2.8 | ~2.7 g |
| Al–Cu | AlCu50 | 3.0–4.0 | ~3.3 g |
| Al–Mn | AlMn10 | 2.8–3.2 | ~3.0 g |
| Al–Si | AlSi20 | 2.5–2.7 | ~2.6 g |
| Cu–Mn | copper ligatures | 8.0–8.5 | ~8.3 g |
| Cu–Ni | nickel ligatures | 8.6–8.9 | ~8.8 g |
| Ni–Mo | nickel-molybdenum | 8.2–9.0 | ~8.6 g |
| Fe–Mn | ferromanganese | 6.8–7.2 | ~7.0 g |
| Fe–Si | ferrosilicon | 6.5–7.0 | ~6.8 g |
| Zn–Al | zinc ligatures | 5.5–6.5 | ~6.0 g |