Stainless Steel 430 Round Rods21
Stainless Steel 430 Round Rods
13/02/2022
Stainless Steel 405 Round Rods11
Stainless Steel 405 Round Rods
13/02/2022

Instruction of Stainless Steel 420 Round Rods

Alloy 420 is a hardenable, martensitic stainless steel that is a modification of Alloy 410. Similar to 410, it contains a minimum of 12% chromium, just sufficient enough to give corrosion resistant properties. Alloy 420 has higher carbon content than Alloy 410 which is designed to optimize strength and hardness characteristics. It has good ductility it the annealed condition but is capable of being hardened up to Rockwell hardness 50 HRC, the highest hardness of the 12% chromium grades. Due to its hardening properties, Alloy 420 is not often welded, although it is possible. Martensitic stainless steels are designed for high hardness and sometimes other properties are to some degree compromised. Corrosion resistance is lower than the common austenitic grades and their useful operating range is limited by their loss of ductility at sub-zero temperatures and loss of strength by over-tempering at elevated temperatures. Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished.

Stainless Steel 420 Round Rods17
Stainless Steel 420 Round Rods
Stainless Steel 420 Round Rods18
Stainless Steel 420 Round Rods
Stainless Steel 420 Round Rods19
Stainless Steel 420 Round Rods
Stainless Steel 420 Round Rods20
Stainless Steel 420 Round Rods

Features of Stainless Steel 420 Round Rods

1. Stainless Steel 420 Round Barscorrosion Resistance:

  • Less resistant than the austenitic grades and the 17% chromium ferritic alloys
  • Good resistance in the hardened condition to the atmosphere, foods, fresh water, and mild acids
  • Resistance lowered in the annealed condition
  • Best with a smooth surface finish

2. Stainless Steel 420 Round Bars Heat Resistance:

Stainless Steel 420 Round Bars Heat Resistance:

3. Stainless Steel 420 Round Bars Welding:

  • Not commonly welded due to air hardening characteristics.
  • Welding may be performed after preheating to 300-400 F
  • Post weld tempering at temperature for 2 hours

4. Stainless Steel 420 Round Bars Anealing:

  • Anneal at temperatures between 1550-1650 F (843-900 C)
  • Allow for slow furnace cooling.

5. Stainless Steel 420 Round Bars Tempering:

  • Temper at temperatures of 300-400 F
  • Air cool for maximum hardness and corrosion resistance.

Marking and packaging of Stainless Steel 420 Round Rods

The packaging of our products (eg. weathered corrugated steel, weathering corrugated steel,corten steel columnl,hot rolled stainless steel plate) ensures that they will not be damaged during transport. For export purposes, the usual export packaging is done in wooden crates or crates. All hr sheet metal, plates and coils are marked with a logo (company mark), grade, size and batch number. On request, we can customise the marking on the product,such as spcc cold rolled steel.

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The Applications of Stainless Steel 420 Round Rods

Alloy 420 is used for a variety of applications where good corrosion and outstanding hardness is necessary. It is not usually used at temperatures exceeding 800oF (427oC) due to quick hardening and loss of corrosion resistance. Examples of applications that use alloy 420 include:

  • Cuttery
  • Knife blades
  • Surgical instruments
  • Needle valves
  • Shear blades
  • Scissors
  • Hand tools

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