Hardened knife steel 420

Non-rusting and good durability, that is our requirement for steel for knives. As a high-alloy and hardened steel, knife steel 420 is ideal for chef's and pocket knives, but also for scalpels. A low carbon and moderate chromium content make the metal very fine-grained. If the knife is hardened from this material, it is ideal for outdoor knives, as the material is robust through and through and impresses with its rust resistance, sharpness and toughness.

Non-rusting and good durability, that is our requirement for steel for knives. As a high-alloy and hardened steel, knife steel 420 is ideal for chef's and pocket knives, but also for scalpels. A... read more »
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Hardened knife steel 420

Non-rusting and good durability, that is our requirement for steel for knives. As a high-alloy and hardened steel, knife steel 420 is ideal for chef's and pocket knives, but also for scalpels. A low carbon and moderate chromium content make the metal very fine-grained. If the knife is hardened from this material, it is ideal for outdoor knives, as the material is robust through and through and impresses with its rust resistance, sharpness and toughness.

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thickness 1,0 -3,0mm
width 360mm
Knife steel sheet hardened
Knife steel sheet hardened (420) 1000 x 360 mm
" The advantages of this steel are its good wear resistance and minimal internal stress. With a Rockwell hardness of 49-53 HRC, this material is ideal for gauges, tools and machine knives in the food industry and scalpels. This special...
Content 1 Meter
From €84.87 *
thickness 1,0 -3,0mm
width 360mm
Messerblech gehärtet
Knife steel sheet hardened (420) 2000 x 360 mm
" The advantages of this steel are its good wear resistance and minimal internal stress. With a Rockwell hardness of 49-53 HRC, this material is ideal for gauges, tools and machine knives in the food industry and scalpels. This special...
Content 2 Meter (€69.10 * / 1 Meter)
From €138.19 *

Knife steel 420 hardened - because not all steel is the same

As humans evolved, they learned to use tools. At first there were worked stones, gradually metals were found and made into tools. The demands on tools and weapons became greater and greater as human development progressed. When the Celts found the first iron ore deposits around 800 BC, they quickly learned to use the new material for their own purposes. However, the pig iron was brittle due to a high carbon content. The fragile metal did not meet the requirements. People soon discovered that the material became more durable when other substances were added and alloys were formed. The resulting mixed metal was more durable and it was soon discovered that the new material was suitable for forging and rolling. The realization that steel is resistant, elastic, but also particularly stable quickly made it a widely used material.  But this steel rusts. It wasn't until 1912 that scientists discovered that an alloy consisting of iron, nickel and chromium had rustproof properties. If the good properties of this alloy are further developed, knife steel 420 is created, which has excellent properties.

Knife steel — Cr steel hardened 420

The 420 Cr steel hardened can be hardened to a higher degree than many other steel alloys due to its carbon content. This steel alloy is often used for surgical instruments, in the food industry and for cutting tools. The material is resistant to aggressive media. If the material is used for ground or polished surfaces, it is also corrosion-resistant.

How can knife steel 420 be processed

Forging should be mentioned first. It takes place with slow heating to a temperature of over 800°C. Once this temperature is reached, the steel is quickly brought to a temperature of 1050°C to 1150°C. The actual forging process should be carried out in the range of 1100°C and 800°C. The steel is then slowly cooled in an oven or in dry ashes. Knife steel 420 is only suitable for welding processes if precautionary measures are observed. Martensitic chrome steel is air-hardening and should only be welded if it cannot be avoided. The steel is particularly resistant to corrosion in the presence of water vapor and weak organic acids, i.e. only in media and media that do not contain chloride low aggressiveness. Particularly good results are achieved when sharpening this steel. This property gave it its name - It is not for nothing that hardened Cr steel 420 is called “knife steel” also called.

Summary

  • Hardened Cr steel 420 can be polished to a high shine
  • can be hardened up to 55 HRC
  • is ferromagnetic.
  • The steel responds very well to mechanical processing. For example, the material can be processed with a band saw without unintentional deformation. The material does not change during mechanical processing.
  • This also makes it possible to finish a workpiece by drilling or milling without any further work steps.
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