QuenchPlate quench (aluminum plates); Sandvik official is oil quench at high cooling rate — plate quench is the maker substitute for thin blades
Cryo / sub-zeroOptional — dry ice or LN2 — recommended for the higher hardness / corrosion range
Temper2× 2 h · cool to room temp between cycles
Reliable hardness58–63 HRC
Sandvik nitrogen-alloyed stainless — clean, corrosion-resistant. Similar HT to AEB-L.
Temper → hardness chart
Approximate HRC after a double-temper at each temperature (from the sources below). Set your target and pick the matching temper.
Temper °F
Temper °C
Hardness
300°F
149°C
62 HRC
350°F
177°C
61 HRC
400°F
204°C
60 HRC
450°F
232°C
58 HRC
Composition (typical, wt%)
Element
%
C
0.62%
Cr
14%
Mn
0.6%
Si
0.2%
N
0.11%
Alleima (Sandvik) 14C28N datasheet
HeatTreatBench — the recipes in your shop, offline
Get the full 14C28N recipe plus 25 more steels offline — set your target HRC and the app gives you the exact temper, with a forge timer and a per-blade log. Works in the shop with no signal.