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Sumitomo Wearplate K400, K450 and K500

Product:Sumitomo Wearplate
Grade:K400, K450 and K500
Kategori:Wear Resistant Plate
Negara Asal:Jepang

Sumitomo Wearplate 400, 450 and 500 is a through hardened abrasion resistant steel with a typical hardness of 415 BHN, 490 BHN, and 510 BHN. These steels are the most widely used of the wear resistant grades. They exhibit an excellent combination of high resistance to impact, workability, Weldability and resistance to abrasion. It has about 5 times the abrasion resistance of common steel plate and contribute to prolonging the service life of mechanical parts.

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Chemical Composition %


Mechanical Properties
Brinell Hardness: 360-440
Heat Treatment: Quenched & Tempered
Yield Point min MPa: 1156 MPa
Tensile Strength MPa: 1325 MPa
Elongation: 25%

Cutting is possible with oxy-propane, oxy-acetylene, plasma, laser and water.
Stack cutting should be avoided.
After gas cutting, the steel plate should not be sprayed or cooled with water.
Tungsten Carbide tools are recommended with close attention to cutting speeds and feeds.

Machining speeds are 50-70% of plain carbon steel. Constant feed and lubrication should be maintained.

Cold forming can be carried out using the following guidelines

Welding can be carried out by manual metal arc, submerged arc or gas metal arc welding. Because the properties of Sumihard 400 results from quenching and tempering, to obtain optimum results the following recommendations should be served when welding.
  • Electrodes and fluxes should be of the low hydrogen type, baked and stored strictly in accordance with the manufacturers recommendations.
  • It is recommended that Sumihard 400 be preheated to a suitable temperature to eliminate the risk of cold cracking in the weld area.
  • The selection of preheat temperatures are dependant upon the plate thickness, geometry and other associated factors. The minimum preheat temperatures for optimum results are set.
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