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CTS-BD30P is a steel made by Carpenter Steel and consists of:

Carbon Chromium Cobalt Copper Manganese Molybdenium Nickel Nitrogen Phosphorus Silicon Sulfur Tungsten Vanadium
1.50 14.00 0.90 / 0.50 2.00 0.25 / / 0.40 / 0.20 4.00

This steel was designed by Carpenter to be their own version of Crucible's CPM-S30V. It was first used by Spyderco after a batch of steel was mismarked and they received this instead of CTS-B75.