Our Process
Materials & Heat Treatment
At Viking Made Forge, material choice is inseparable from technique. Each steel—and each combination of materials—is selected not only for performance, but for what it demands of the smith. Moving fluently between mono-steel, laminated constructions, pattern welding, stainless cladding, copper integration, and handmade bloom steel requires mastery of heat, timing, atmosphere, and mechanical control in the forge.
Every material responds differently to temperature, pressure, and time. Understanding those responses—and adjusting the process accordingly—is the foundation of this work. Visible features such as hamon activity, layered patterns, and boundary phenomena are not applied decoration. They are evidence of controlled transformation and informed decision-making at every stage.
The Steels We Work
Each steel demands its own approach. Mastery comes from understanding how different materials respond to the forge.
W2 Tool Steel
Expressive Differential Hardening
W2 is our primary expressive steel for differentially heat-treated blades. When hardened with clay, W2 responds vividly to thermal gradients, producing ashi and internal activity that record the heat treat itself. This behavior closely mirrors what we observe in handmade bloom steel (oroshigane). The edge is hardened fully for performance while the spine retains toughness and resilience.
Shirogami (White Paper Steel)
Discipline and Refinement
Traditional Japanese Shirogami steel is valued for its purity, fine grain, and direct feedback during forging and heat treatment. We primarily work with Shirogami #2, which balances exceptional sharpness with the toughness required for daily kitchen use. Shirogami rewards restraint—when differentially hardened, the resulting hamon is clean and understated, reflecting precision rather than spectacle.
Damascus (1084 / 15N20)
Pattern Welding Mastery
Our pattern-welded Damascus blades are forged from 1084 and 15N20 steels, chosen for compatibility in carbon content, heat-treatment response, and toughness. Low-layer Damascus appears in the Foundation Series, while high-layer patterns—such as feather Damascus, Turkish twist, and complex manipulated structures—are Signature Series work requiring many forging and welding cycles.
Go-Mai (1084 / Copper)
Copper Integration
Go-mai blades combine a high-carbon 1084 core with copper layers and outer steel. Integrating copper and steel requires precise forge control: temperatures must be hot enough to allow the copper to braze and bond, yet carefully limited so the copper does not melt and fail. Successfully bonding these materials demands exact timing, controlled forge atmospheres, and confident mechanical reduction.
Stainless San-Mai
410 Stainless / 1084 Core
Stainless san-mai blades pair a high-carbon 1084 core with 410 stainless steel cladding. Forge welding stainless steel to carbon steel is exceptionally challenging due to chromium’s behavior at high temperatures. Chromium rapidly oxidizes to form a self-healing chromium-oxide layer that acts as a barrier during welding. Achieving a sound weld requires meticulous surface preparation, controlled atmospheres, and decisive mechanical pressure.
Oroshigane
Handmade Bloom Steel
In select works, blades are forged from handmade steel—smelted in a charcoal furnace from raw iron sources and refined entirely by hand. The bloom produced must be consolidated, sorted, and repeatedly forged before it becomes usable material. Oroshigane represents the deepest level of material engagement. Working this steel sharpens understanding of heat, carbon movement, and structural transformation, informing every other process in the shop. These blades are made in extremely small numbers and represent the origin point of the craft.
The Heat Treatment Process
Every blade receives individual attention. Temperature, timing, and technique are calibrated to the specific steel and intended use.
Normalization
Multiple heating cycles refine grain structure and relieve forging stresses
Clay Application
For differential hardening, clay controls thermal gradients across the blade
Quenching
Rapid cooling transforms steel structure, creating hardness where needed
Tempering
Controlled reheating balances hardness with toughness for optimal performance
A Note on Hamons
Hamon lines appear only when the steel, geometry, and intended use justify differential hardening. They are a signature of our heat-treat philosophy—not a guarantee on every knife. When present, they record controlled transformation. When absent, performance and longevity remain the priority.
The hamon is not decoration—it is structural evidence of grain refinement, balance, and intent. The resulting line marks the transition between the fully hardened edge and the resilient spine, visible proof of the thermal journey each blade undergoes.
Experience the Craft
Every Viking Made Forge blade represents this philosophy—material selection, forging technique, and heat treatment working in harmony to create tools built for generations of use.