Groups of steel | Strength class | Dimension | Šrouby | Matice | ||
---|---|---|---|---|---|---|
Limit of strength Rm N/mm2 min. | Yield point Rp0,2N/mm2 min. | Extension to break ALmin. | Trial tension Sp N/mm2 | |||
A1, A2, A4 | 50 | M 39 | 500 | 210 | 0,6 d | 500 |
70 | M 20 | 700 | 450 | 0,4 d | 700 | |
80 | M 20 | 800 | 600 | 0,3 d | 800 |
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