1.4021 (ASTM 420 – SS2303)

By using 1.4021(ASTM 420 – SS2303) you get a stainless and hardenable steel with high tensile strength and good corrosion resistance. The steel has good machinability and is used for e.g. shafts, spindles, pump parts and nuts.

The steel grade 1.4021(also called ASTM 420 and SS2303) is a high tensile strength martensitic stainless steel with good corrosion properties. The steel is machinable and suits good for production of details with good resistance to e.g. air water steam, freshwater, certain alkaline solutions and other mildly aggressive chemicals.  It shall not be used in marine or in chloride environment. The steel is magnetic and in the quenched and tempered condition.

Some typical application areas for EN 1.4021:

  • Pump- and Valve parts
  • Shafting
  • Spindels
  • Piston rods
  • Fittings
  • Stirrers
  • Bolts
  • Nuts

Weldable steel for for machining
1.4021 is possible to weld and shall be welded with welding consumables similar to that of the parent one. The steel is generally easier to machine than ”conventional” austenitic steels. The heat treatment condition of 1.4021 is QT 700 and it should be hot formed in the temperature range 1100-800°C. Slow cooling after hot forming.

We offer steel grade 1.4021 in the following profiles

Steel grade 1.4021 is available as machined round bar in the dimensions 16 – 160 mm.

If there is something you miss or wonder about you can always contact us to discuss your needs.

Product data sheet 1.4021

If you need further information about the properties of the steel grade, machining and welding:

Download product datasheet 1.4021 (ASTM 420 – SS2303) (pdf) >>