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Product properties | Internal Control Standards | ||||
±10turns | Copper spikes | None | – | ||
Crack | – | ||||
Total less than 3cm | |||||
Peel off | – | ||||
Total less than 3cm | |||||
Copper powder(mg) | ≤5mg | ≤15mg | |||
±10 Turns until torsion(turns) | ≥30Without any bell-shapes or cracks | ≥25 | |||
Oxygen content(ppm) | 200-250 | ≤400 | |||
Number of flaws detected | (L) | ≤1 | – | ||
(M) | ≤3 | – | |||
(S) | ≤30 | – | |||
Number of iron detected | (L) | 0 | – | ||
(M) | 0 | – | |||
(S) | 0 | – | |||
Elongation(%) | ≥40 | ≥40 | |||
Diameter | 8.0±0.2mm | 8.0±0.4mm | |||
Resistance | ≤0.01704 | ≤0.01707 | |||
Oxide layers | ﹤600 | – | |||
Appearance | Smooth surface, no burr, no impurities or other flaws | Smooth surface, no burr, no impurities or other flaws | |||
Production condition | Blocks in the furnace | none | – | ||
Cold copper | none | – | |||
Stabilitu of copper water temperature | ±5℃ | – | |||
Stability of ingot temperature | ±5℃ | – | |||
Casting condition | Without significant fluctuations in the level | – | |||
Others | Normal and Stable | – |
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