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SS420 | X20Cr13 | 420
Key Features
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High Hardness After Heat Treatment
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Excellent Polishability
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Moderate Toughness
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Good Corrosion Resistance
Size Range
Round Bar
80 mm To 500 mm Diameter
Flat Bar
80mm*80mm To 510mm*360mm
About the Steel
SS420 stainless steel is a hardenable martensitic stainless steel that offers a strong combination of hardness, strength, and moderate corrosion resistance. It can be easily machined in the annealed condition and develops high hardness and wear resistance after heat treatment. SS420 performs well in mildly corrosive environments such as water, food acids, and some chemicals, but it is not suitable for highly aggressive or marine environments. While it offers good edge retention and polishability, its toughness decreases at higher hardness levels, making it best suited for wear and cutting applications rather than impact or structural uses.
Applications
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Cutlery & Surgical Instruments
Used in knives, scissors, and medical tools for sharpness and corrosion resistance.
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Pump & Valve Parts
Ideal for shafts, spindles, and seats exposed to water and mild chemicals.
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Moulds & Dies (Plastic Industry)
Used for mirror-finish molds requiring polishability and hardness.
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Industrial Blades & Wear Parts
Suitable for components needing high surface hardness and wear resistance.
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Automotive & Mechanical Components
Applied in shafts, pins, and fasteners with moderate corrosion exposure.
Manufacturing
Process flow for manufacturing 420 steel
Melting
Ingots melted in EIF, impurities fully killed and followed LRF and VD process at Client's request. Ingots annealed
Forging
Press or Hammer Forged with reduction ratio of 3.5 to 4.5 times
Heat Treatment
Full annealing cycle post forging or any special QT process as per Client's TDC
Quality Test
Ultrasonic, Hardness, Mechanical, Microstructure testing of the metal at a NABL approved lab
Proof Machining
Proof machining of Forged Rounds and Flats as per Client's requirements
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