日立特殊鋼，日本
白三鋼 / 白紙三號 白三鋼
Hardness
Rockwell C Hardness (HRC) measures how resistant a steel is to permanent deformation. For kitchen knives:
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.
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.
59–61
HRC
555759616365+
白鋼三號雖不如白鋼一號或二號常被提及，但同屬日本高碳鋼「白紙鋼」系列。其碳含量為0.8%，低於白鋼一號（1.2%）及二號（1.0%），因此硬度略低，使用時較為寬容。這使其較易研磨且不易崩口，但鋒利持久度略遜於高碳版本。白鋼三號適合追求傳統日式刀具鋒利度與純淨度、但希望刀刃保養較為輕鬆的用家。與其他白紙鋼一樣，白鋼三號極易氧化，需妥善保養以防生鏽。此鋼材以易於研磨與性能的平衡著稱，是高碳日式刀新手或需更耐用刃口用途的理想入門選擇。
Composition
白三鋼 / 白紙三號 Element Composition
Compare with
白三鋼 / 白紙三號
—
0.8%
0.6%
0.4%
0.2%
0
C
0.8%
Mn
0.2%
Si
0.1%
P
0.025%
S
0.004%
C — Carbon
Mn — Manganese
Si — Silicon
P — Phosphorus
S — Sulfur
Hardness
59–61 HRC
555759616365+
Knives in 白三鋼 / 白紙三號
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Yoshikazu Ikeda
BFCM2025 老庫存 吉和池田 本燒 White 3 牛刀 240mm 樟木套裝 SP2
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BFCM2025 老庫存 吉和池田 本燒 White 3 牛刀 240mm SP1
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Yoshikazu Ikeda
Yoshikazu Ikeda Honyaki Sakimaru Sujihiki 450mm 白色 3 鋼
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Sakai Takayuki
堺貴之 白色 3 日本金世柳葉 240mm
Sakai Takayuki
堺貴之 白色 3 日本金世柳葉 330mm
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Sakai Takayuki
堺貴之 白 3 日本金世柳葉 300mm
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Sakai Takayuki