CPM S35VN Stainless Steel

Crucible CPM S35VN Stainless Steel

Powder-technology "super steel" from US maker Crucible Industries, some sizes are precision ground.

This is a more expensive version of the popular S35VN that is precision ground to be very, very flat.

Some dimensions are precision-ground and some are not, check each dimension under Options.

The 3.2 x 100 mm wide flat steel bar stock is not precision ground.

CPM S35VN has Extreme edge retention with ultra high carbon at 1.40%.

Will work and grind like D2 and give the hardness and toughness of CPM S30V. A cryo treatment may be added between tempers. Aim hardness is 58/61. CPM S35VN is a registered trademark of Crucible Industries LLC.
Typical chemistry C 1.40, Mn .40, Si .40, CR 14.00, Va 3.00, Mo 2.00, NB .50.

For more details and heat treatment, check out knifesteelnerd here: https://knifesteelnerds.com/2020/01/13/s35vn-steel-properties-and-how-to-heat-treat/ 

Heat treating S35VN can be done at different levels of complexity. The below is the "ultimate" version from knifsteelnerd.com:

• hold at 2025 F for 15 mins (1107 C)
• plate quench
• liquid nitrogen/cryo treatment for 30+ mins
• temper between 300 - 400 F for 2 hours x 2 (149 C - 204 C)
• (adjust temp for hardness, aim for 60 HRC as a starting point)

A simpler heat treatment recipe that is proven to work but provide a slightly lower HRC:

• hold at 1950 F for 15 mins (1065 C)
• quench in oil
• temper at 400 F (204 C) for 2 hours x 2 for 57-58 HRC