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Heat treatment 420J2 Stainless Steel HRC50-55 for knife

420J2 heat treated stainless steel plate
Availability:

  • 420J2

  • DSM

  • 420

  • SUS 420J2

  • knife,blade,

420 heat treated stainless steel

Tensile strength

Tensile strength is the main performance of the material after quenching. Generally, the tensile strength of 420J2 after quenching can reach more than 1400, and the unquenched material is about 900.

Anti-rust performance

The anti-rust performance of martensitic steel after quenching is better than that of unquenched materials, mainly because after the carbon chromium decomposes, the carbon dissolves in the matrix, and the chromium element strengthens the anti-rust properties. Chromium is an element that plays a decisive role in rust prevention in 400 series stainless steel. Due to the presence of carbon chromium compounds before quenching, the actual chromium element that is responsible for rust prevention is about 2% lower than the actual content. After quenching, the chromium element content can increase by 1%. above.

DESCRIPTION
420J2 grades are hardenable martensitic stainless steel used for cutlery, pump bushings and valves

CHEMICAL  COMPOSITION Grade C2 Si Mn P S Cr Ni 列1
420J1 ≤1.00 ≤1.00 ≤0.040 ≤0.030 12.0-14.0 ≤0.6

420J2 0.26-0.40 ≤1.00 ≤1.00 ≤0.040 ≤0.030 12.0-14.0 ≤0.6

APPLICATIONS Cutlery / Pump Valves/ Bushings / Screw-drivers

MECHANICAL PROPERTIES
AFTER  COLD
ROLLING  AND
FINAL ANNEALING
Rp0.2 > 520 > 540
Rm > 225 > 225
Elongation > 18 % > 18 %
Hardness < 97 B < 99 B

CORROSION RESISTANCE This grade has moderate corrosion resistance to atmosphere, fresh water, mild acids present in fruit juices and milk like lactic, tartaric, citric acids, mild alkalis etc.
The corrosion resistance is best in hardened and tempered conditions.

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