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JIS G4304 or JIS G4305 SUS420J2 Stainless steel plate/coil Fabrication

SUS420J2 Machinability

Stainless steel grade 420J2 is machinable both in hardened and tempered conditions such as turning, drilling, and bending; however it is recommended that machining in hardened condition should be avoided as far as possible.

SUS420J2 Welding

Welding of stainless steel grade 420J2 is easy. It is recommended that welding in annealed or hardened and tempered conditions should be avoided as it causes formation of brittleness, resulting in cold cracking due to contraction stresses.
Pre-heating and inter-pass temperature control during welding, followed by very slow cooling and post-weld annealing are good measures to take to prevent cracking.

SUS420J2 Annealing

Annealing of this material can be performed by heating uniformly to 840-900°C (1544-1652°F) and held until the temperature is uniform throughout the section. Soaking and cooling is required.

SUS420J2 Hardening
Stainless steel grade 420J2 can be hardened by heating 950-1020°C (1742-1868°F) and held until temperature is uniform throughout the section. This should be followed by quenching in oil or air cooling. Tempering should be done when it is slightly warm.

SUS420J2 Feature
Stainless steel corrosion-resistant , eliminating the heat treatment , no distortion caused by heat treatment , ultra- performance mirror finish , with good machinability in the annealed condition .

SUS420J2 Use
Knitting needles, loom reeds, spinning machines, doctor blades, blades, rulers, soldering irons, scrapers, HDD drive components, bearings, and various springs

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