San Mai / Damascus vs Aogami #2

Detailed metallurgical comparison between Three-Layer / Pattern Steel and Blue Paper Steel #2.

DAMASCUS-SAN-MAI

San Mai / Damascus

Three-Layer / Pattern Steel

San Mai ('three-layer') is the classic Japanese lamination: a hard carbon steel core (hagane) forge-welded between two layers of softer iron or steel (jigane). This produces a blade that takes a razor edge while the body provides toughness to resist chipping. Damascus refers to visible pattern-welded variants with dozens of alternating layers. Both traditions originate in functional necessity; the patterns visible in polished Damascus are a by-product of functional metallurgy, not decoration.

coreVaries (typically Shirogami or Aogami)claddingSoft iron or stainless
Sharpness
9
Edge Retention
8
Ease of Sharpening
8
Rust Resistance
5
AOGAMI-2

Aogami #2

Blue Paper Steel #2

Similar to Aogami #1 but with slightly lower carbon and tungsten content. Offers an excellent balance of edge retention and toughness, making it the most-used steel among Japanese master blacksmiths. The sweet spot of the Aogami family — demanding enough to be worthy, forgiving enough to be reliable.

carbon1.05–1.15%chromium0.20–0.50%tungsten1.00–1.50%
Sharpness
8
Edge Retention
8
Ease of Sharpening
7
Rust Resistance
4