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Properties of Stainless Steel Alloys for Spinning (300 & 400 series)

   25 May,2021

300 Series Stainless Steel Alloys


300 series stainless steels are non-magnetics and have an austenitic crystalline structure, making up over 70% percent of total stainless steel production. They are known for their ability to retain structure at all temperatures and corrosion resistance.

  • 301 Stainless Steel - Alloy 301 is a commonly available austenitic stainless with good corrosion resistance and elevated carbon to allow for cold working to a variety of tempers.
  • 302 Stainless Steel - Alloy 302 is a slightly higher carbon version of 304, often found in strip and wire forms. It is a tough, ductile grade that demonstrates comparable corrosion resistance, is non-magnetic, and is not hardenable by heat treatment.
  • 303 Stainless Steel - Alloy 303 is the most readily machineable austenitic stainless steel; however, the sulfur addition does lower Alloy 303’s corrosion resistance to below that of Alloy 304.
  • 304/304L/304H Stainless Steel - Alloy 304 is the most versatile and widely used alloy in the stainless steel family. The austenitic stainless steels are also considered to be the most weldable of the high-alloy steels and can be welded by all fusion and resistance welding processes.
  • 316/316L Stainless Steel - Alloy 316 provides excellent elevated temperature tensile, creep and stress-rupture strengths, as well as outstanding formability and weldability.
  • 317/317L/317LMN Stainless Steel - Alloy 317 is a higher chromium, nickel and molybdenum version of 316 stainless designed principally for increased strength and corrosion resistance.
  • 321/321H Stainless Steel - Alloy 321 stainless is resistant to intergranular corrosion. It employs titanium as a stabilizing element against chromium carbide formation. This alloy also exhibits strength characteristics superior to those of 304 stainless.
  • 347/347H Stainless Steel - Alloy 347 uses columbium as a stabilizing element to maximize its principal feature: resistance to intergranular corrosion. It can be used in applications requiring repeated heating in the range of 800 and 1650 F (427-899 C).

  • Stainless Steel Alloys, 300 & 400


    400 Series Stainless Steel Alloys


    400 series stainless steel alloys are less resistant to corrosion and are magnetic. The basic alloy contains 11% chromium and 1% manganese.

  • 405 Stainless Steel - Alloy 405 is a 12% chromium steel designed to be used in the as-welded condition. Unlike other 12% chromium steels, it is not subject to a great deal of hardening through air cooling form high temperatures.
  • 409 Stainless Steel - Alloy 409 is an alloy designed principally for the automotive exhaust industry, although it has been used successfully in other industrial applications. It combines good elevated temperature corrosion resistance with medium strength, good formability and overall cost.
  • 410/410S/410HT Stainless Steel - Alloy 410 is the basic martensitic stainless which will attain high mechanical properties after heat treatment. It has good impact strength, corrosion and scaling resistance up to 1200 F (649 C).
  • 416/416HT Stainless Steel - Alloy 416 was the first free machining stainless steel. It is a heat treatable chromium steel with excellent machinability and non-galling characteristics. The alloy is magnetic in all conditions.
  • 420 Stainless Steel - Alloy 420 is a general purpose heat treatable chromium steel which is a popular cutlery grade.
  • 430 Stainless Steel - Alloy 430 is a basic ferritic non-heat treatable stainless steel. Its strengths are in ductility, formability, good corrosion and oxidation resistance, thermal conductivity and finish quality.
  • 440C Stainless Steel - Alloy 440C is a high carbon martensitic stainless with moderate corrosion resistance good strength and the ability to obtain and keep excellent hardness (Rc 60) and wear resistance.


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