CTS-XHP

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

Carbon

Chromium

Cobalt

Copper

Manganese

Molybdenium

Nickel

Nitrogen

Phosphorus

Silicon

Sulfur

Tungsten

Vanadium

1.60

16.00

/

/

0.50

0.80

0.35

/

/

0.40

/

/

0.45

Some information from Sal posted on the Spyderco forum:

We are proud to have been able to be the first to introduce Carpenter's CTS-XHP in a production knife. A stainless D2 alloy that has shown to be exceptional in knife blade qualities. you will surely see more Spyderco models using the excellent steel.