Oblivion Steel 52100 San Mai - (Copper/Nickel/416 Clads)

Hand-forged by Oblivion Blades, this 52100 San Mai combines a high-performance carbon steel core with beautifully contrasting outer layers. Each billet is meticulously constructed and flattened for consistent thickness, clean lamination, and exceptional workability—ready for your next high-performance knife project.

Core Steel

• 52100 High-Carbon Steel – known for its superb edge retention, fine grain structure, and balanced toughness. A long-time favourite for kitchen, hunting, and utility knives.

Cladding Options

Copper / 1020 Mild Steel – Creates a stunning warm tone that patinas naturally over time. Ideal for showpiece blades or unique collector pieces.

Nickel / 1020 Mild Steel – Bright and eye-catching contrast that etches beautifully and highlights the San Mai line.

Nickel / 416 Stainless Steel – Offers a sleek, corrosion-resistant exterior with a refined modern finish. Great for lower-maintenance knives.

Specifications

• Dimensions: 3 x 55 x 500 mm
• Maker: Oblivion Blades
• Core: 52100 Carbon Steel
• Outer Layers: Copper/1020, Nickel/1020, or Nickel/416

Heat Treating Instructions (52100 Core)

Forge/Fabrication Notes:

• Forging range: 850–1100°C (1560–2010°F)
• Do not forge below 850°C to avoid cracking.
• Normalize after forging to refine grain and reduce stress.

Normalization:

• Heat to 870°C (1600°F), air cool to black.
• Repeat at 830°C (1525°F), air cool.
• Final cycle at 790°C (1450°F), air cool to room temperature.

Austenitising:

• Heat to 830–870°C (1525–1600°F) for 5–10 minutes.
• Use a controlled atmosphere or stainless foil wrap to reduce decarb.
• Avoid overheating—grain growth occurs rapidly above 870°C.

Quench:

• Quench in warm oil (40–60°C) or fast oil such as Parks 50.
• Agitate gently and evenly to prevent warping of the San Mai layers.

Tempering:

• Temper immediately after quench, once cool to touch (~50°C).
• Recommended range: 150–200°C (300–390°F) for 60–64 HRC.
• Double temper for 1 hour each cycle.