The Chemical composition of the ’lots’ supplied shall generally be as follows:
| Element | |||
| CP Grade I | CP Grade II | CP Grade III | |
| Iron (Fe) | <0.050 | <0.100 | <0.300 |
| Carbon (C) | <0.015 | <0.015 | <0.050 |
| Oxygen (O) | <0.050 | <0.080 | <0.300 |
| Nitrogen (N) | <0.010 | <0.010 | <0.020 |
| Magnesium (Mg) | <0.040 | <0.050 | <0.100 |
| Chloride | <0.040 | <0.050 | <0.010 |
| Nickel (Ni) | <0.010 | <0.010 | <0.010 |
| Chromium (Cr) | <0.015 | <0.015 | <0.020 |
| Hydrogen (H) | <0.005 | <0.005 | <0.005 |
| Other Elements (Total) (Individual <0.010 %) |
<0.050 | <0.050 | <0.050 |
| Titanium(Ti) (approx. by difference |
>99.70 | >99.60 | >99.00 |
Hardness of the material shall be:
| Grade | Hardness (BHN) |
| CP Grade I | <110 |
| CP Grade II | <110 - 150 |
| CP Grade III | >150 |
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