スウェーデン鋼 スウェーデン鋼
55–58 HRC — Soft. Easy to sharpen and forgiving of rough use, but dulls faster. Typical of most German knives.
59–61 HRC — Balanced. Good edge retention with manageable sharpening. Common in mid-range Japanese knives.
62–64 HRC — Hard. Excellent edge retention, holds a very fine edge. Requires more care and a fine stone to sharpen.
65+ HRC — Very hard. Exceptional edge longevity but more brittle — more prone to chipping if used roughly.
Higher is not always better — it depends on how you use and maintain your knife.
ウッデホルム:AEB-L鋼
サンドビック:12C27、14C28、19C27
これらの鋼材は炭素含有量が類似しており(0.6〜0.7%)、一般的にHRC 59〜60程度に熱処理されます。
