Same Name, Different Knives
Walk into any kitchen store and you'll see two brands: Zwilling J.A. Henckels and Henckels International. They share a parent company and a name, but the knives are meaningfully different in steel, manufacturing, heat treatment, and price. Zwilling is the premium German-made line. Henckels International is the budget entry line, often manufactured in Spain, China, or India.
Steel Comparison
| Feature | Zwilling (Pro/Four Star) | Henckels International |
|---|---|---|
| Steel | X50CrMoV15 (Friodur) | X50CrMoV15 or 420-series |
| Hardness (HRC) | 57–58 HRC | 54–56 HRC |
| Heat Treatment | Friodur ice-hardening | Standard hardening |
| Edge angle | 15° per side | 18–20° per side |
What Friodur Ice Hardening Does
Zwilling's Friodur process is a cryogenic hardening technique that takes the blade to -94°F (-70°C) after initial hardening, converting residual austenite to martensite. The practical result is better edge retention and improved corrosion resistance. Henckels International knives skip this step, achieving 2–3 HRC points lower hardness in practice.
Zwilling wins on blade hardness, edge retention, and longevity due to Friodur ice-hardening. Henckels International wins on price and accessibility. Look for the twin man logo (Zwilling) vs single man logo (Henckels International) on the blade — that's the fastest way to tell them apart.