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Examples of applications by steel grades

Classification Steel grade Purpose
Spring Small screw Bolts and nuts Metal mesh Shaft, pin Needle Nail Wirerope Pad Cutting components
Martensite 403 ○ ○
410 ○ ○
416 ○ ○
420J2 ○
NSSC 550 ○ ○ ○ ○
Ferrite 410L ○
430 ○ ○ ○
430F ○
434 ○
444 ○
NSSC 160R ○ ○ ○ ○
NSSC 180 ○ ○ ○ ○
NSSC 190 ○ ○
Austenite 201 ○ ○
302 ○ ○ ○
303 ○ ○
303Cu ○ ○
304 ○ ○ ○ ○ ○ ○ ○ ○
304L ○ ○ ○
304N1 ○ ○ ○
304J3 ○ ○
305 ○ ○
305J1 ○
309S ○
310S ○
316 ○ ○ ○ ○
316L ○
316C ○ ○
316F ○ ○
317 ○ ○
317L ○ ○
321 ○ ○
347 ○ ○
XM7 ○ ○
NSSC 170 ○ ○
NSSC 270R ○ ○ ○ ○
NSSC 130M ○ ○
NSSC 131 ○
Austenitic-Ferrite NSSC 2120 ○ ○ ○ ○
precipitation hardening 631J1 ○ ○
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Examples of Characteristics and usage of steel grades

Martensitic Stainless Steel

  • It is an Fe-Cr alloy, a stainless steel alloy containing 13% Cr.
  • It has heat treatment characteristics similar to most alloy steels and its wide range of mechanical properties can be achieved by appropriate heat treatment.
  • This type of steel belongs to the family of strong magnetic materials.

Ferritic

  • It is an Fe-Cr alloy that contains over 18% Cr and hardly generates a Y phase at high temperatures. It is basically a single-phase ferrite.
  • This type of steel will not undergo essential hardening even after heat treatment.
  • After annealing treatment, it can give full play to its softness, elongation and corrosion resistance, but it is as magnetic as martensite stainless steel.

Austenitic Stainless Steel

  • It is a Fe-Cr-Ni alloy, represented by 18Gr-8Ni steel, which is a non-magnetic single-phase austenite from room temperature to high temperature.
  • It will not be hardened by heat treatment.
  • This kind of austenitic stainless steel will produce work hardening and work induced phase transformation after cold working, so it can play a wide range of mechanical properties. Sometimes it exhibits magnetism.
  • By annealing through high temperature quenching and controlling the precipitation of carbides, the softness, elongation and corrosion resistance can be maximized.

Austenitic Ferritic Stainless Steel

  • It is a stainless steel with a mixed structure of austenite and ferrite.
  • High strength when heat treated.
  • Excellent corrosion resistance and superior stress corrosion resistance compared to austenitic stainless steel.