CPMS
CPM S35VN Stainless Powder Steel 3.8 x100 x 460 mm
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Description
Crucible CPM S35VN Stainless Steel, 3.2 x100 x 460 mm, mill finish
Powder-technology "super steel" from US maker Crucible Industries, mill finish means the normal steel finish and not precision ground/milled.
Measurements are 1/8" x 4" x 18" or about 3.2 x 100 x 460 mm.
This "super stainless" has extreme edge retention. 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