Californian San Mai K390 Microclean Billet – Cryo Treated Core Steel
$240.00
Premium handcrafted Californian San Mai billet featuring a Böhler K390 Microclean core hardened to 63–64 HRC, stainless 440B outer layers, and nickel interlayers. Double cryogenic treatment delivers exceptional wear resistance, impact strength, edge retention, and aggressive cutting performance for elite custom knives.
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Californian San Mai K390 Microclean
A premium San Mai billet designed for knife makers who demand extreme edge retention, durability, and cutting aggression.
This handcrafted laminated construction combines a high-performance Böhler K390 Microclean core with durable 440B stainless steel outer layers and nickel interlayers, creating an exceptional balance of toughness, wear resistance, corrosion resistance, and premium aesthetics.
The K390 Microclean core is heat treated to 63–64 HRC, offering outstanding cutting performance, high impact strength, and superior resistance to abrasive wear, making it ideal for demanding high-performance knives.
Each billet undergoes an advanced two-stage cryogenic treatment in liquid nitrogen, improving carbide refinement, structural stability, and long-term edge performance.
Construction
- Outer Layers: 440B Stainless Steel — 60–61 HRC
- Intermediate Layer: Nickel (Ni)
- Core Steel: Böhler K390 Microclean — 63–64 HRC
Key Features
- Exceptional wear resistance
- High impact toughness
- Outstanding edge retention
- Premium laminated San Mai construction
- Double cryogenic treatment
- Excellent cutting aggression
- Ideal for high-end custom knife making
Chemical Composition of K390 Microclean
- Carbon (C): 2.47%
- Vanadium (V): 9%
- Cobalt (Co): 2%
- Tungsten (W): 1%
- Molybdenum (Mo): 3.8%
- Chromium (Cr): 4.2%
- Silicon (Si): 0.55%
- Manganese (Mn): 0.4%
Built for makers seeking elite performance, maximum durability, and exclusive San Mai craftsmanship.
Shipping & Guarantee
We ship orders from Los Angeles, California across the United States and internationally.
• Free shipping in the USA on orders over $ 300
• Flat shipping to Canada — $ 30
• Orders in stock ship within 24 hours
• Average delivery time in the USA — about 5 business days
Backorders:
Some products may be temporarily out of stock.
If an item is marked Backorder, the estimated waiting time is:
30–45 days. This includes production and international logistics.
You will receive an email notification once your order has shipped..
Returns:
We accept returns within 15 days after delivery. To qualify for a return:
• The product must be unused
• The item must be in original packaging
• All components must be included
Please contact us before sending any item back.
Email: ask@usa-market.net
Damaged or Incorrect Orders:
• If you receive a damaged or incorrect product:
• Take photos of the item
• Send them to ask@usa-market.net
Include your order number. We will review your case and offer:
Replacement / Refund / Store credit
• Free shipping in the USA on orders over $ 300
• Flat shipping to Canada — $ 30
• Orders in stock ship within 24 hours
• Average delivery time in the USA — about 5 business days
Backorders:
Some products may be temporarily out of stock.
If an item is marked Backorder, the estimated waiting time is:
30–45 days. This includes production and international logistics.
You will receive an email notification once your order has shipped..
Returns:
We accept returns within 15 days after delivery. To qualify for a return:
• The product must be unused
• The item must be in original packaging
• All components must be included
Please contact us before sending any item back.
Email: ask@usa-market.net
Damaged or Incorrect Orders:
• If you receive a damaged or incorrect product:
• Take photos of the item
• Send them to ask@usa-market.net
Include your order number. We will review your case and offer:
Replacement / Refund / Store credit
