China · GJB
Be3
GJB 1539:1992 — Specification of beryllium bars for inertial guidance components
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| Al | 0.05 | |||
| Be2C | 0.15 | |||
| Cr | 0.02 | |||
| Cu | 0.02 | |||
| Fe | 0.13 | |||
| Mg | 0.04 | |||
| Mn | 0.02 | |||
| Ni | 0.02 | |||
| O | 1.28 | |||
| Si | 0.06 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars | ≥310 | ≥410 | ≥1.5 | HB ≥80 δ25 |