|
Classification
|
Characteristics
|
Usage
|
|
Austenitic
|
301
|
Has lower
Cr, Ni content than 304 steel. Its tensile
strength increases with cold working. It is
non-magnetic but becomes magnetic when cold
worked. |
Trains, aircraft
parts, belt conveyors, vehicles, bolts, springs,
automotive wheel covers |
|
301L
|
301L is produced
by lowering the C content in 301 in order
to improve grain boundary corrosion resistance
of the welding part. A drop in strength due
to reduced C content is reinforced by adding
N. |
Train frames,
building exterior material |
|
303
|
Improved machining
by adding S. |
Shafts for
home appliances, bolts and nuts, machined
parts |
|
304
|
Most widely
used steel type. 304 is known for good corrosion
resistance, thermal resistance, low-temperature
strength and mechanical properties. 304 has
good drawability such as deep drawing and
bending. 304 is not hardened by heat treatment.
(non-magnetic, usable temperature: -196~800°C) |
Kitchen ware,
sinks, interior piping, hot-water boilers,
bath tubs, boilers, automobile parts (wiper,
muffler, molding), medical instruments, building
materials, facilities in chemical, food and
dairy industries, vessel parts |
|
304L
|
304L is low
carbon 304 steel. Under normal conditions,
it has similar corrosion resistance to 304.
Excellent resistance to inter-granular corrosion
after welding and stress relieving. Has corrosion
resistant properties without heat treatment
and is generally used at temperatures under
400°C(non-magnetic, usable temperature:-196~800°C) |
Machinery
and tools used in the chemical, coal, and
petroleum industry that require high inter-granular
corrosion resistance, building materials,
heat resistant part and parts that are difficult
to heat-treat |
|
304Cu
|
By adding
Cu, it has anti-microbial property and good
drawability. Useful for deep drawing products
which requires a hygienic environment |
Thermos bottles,
kitchen sinks, pots, group food serving facilities,
door knobs, products requiring spinning |
|
304N1
|
304steel is
made by lowering the S and Mn content in 304
steel and adding N to prevent ductility reduction.
Strength is improved and thickness reduced.
|
Structural
use, street lights, water tanks, water pipes |
|
304LN
|
Strength and
inter-granular corrosion resistance are improved
by adding N. |
Structural
use, heat exchange systems, chemical vessels |
|
304H,M,S
|
Steel
types formed for wire rods by adjusting the
C content in 304 steel. Strength increases
with cold drawing. |
H:
wire ropes, hooks, CD Bars
M: mesh, bolts, nuts, CD Bars
S: mesh |
|
304HA,HC
|
Steel types
formed for wire rods by adjusting the C content
in 304. Good cold workability and free-cutting
property. |
HA: shaft
HC: medium and large size bolts and nuts
HD: CD Bars HN: nails |
|
305
|
High Ni content.
Non-magnetic and suitable for deep drawing
use due to good cold formality. |
Dinnerware,
electrical parts |
|
316
|
Excellent
corrosion resistance, pitting corrosion resistance
and high temperature strength by adding Mo.
Useful in severe/harsh conditions. Excellent
work hardening (non-magnetic). |
Sea water
equipment, equipment for chemicals, paper,
dye, acetic acid, fertilizer, photo and food
industry and construction in coastal areas,
ropes, CD Bars, nuts and bolts |
|
316L
|
Low carbon
steel type. Has the normal properties of 316
plus excellent inter-granular corrosion resistance.
|
Made with
316 steel, excellent inter-granular corrosion
resistance, mesh |
|
316S
|
Has 316 steel
properties and suitable for ultra fine wire. |
Mesh |
|
321
|
By adding
Ti, prevents intra-granular corrosion, suitable
for temperatures between 430°C~900°C |
Airplane exhaust
pipes, boilers, heat exchangers. |
|
Ferritic
|
409L
|
By adding
Ti, 409L has good weldability and drawability. |
Used for automobile
exhaust pipes, heat exchangers, container
for which post-heat treatment is not applied. |
|
410L
|
Excellent
welding bendability by lowering the C content
in 410 steel; high temperature oxidation resistance
(magnetic). |
Machine frames,
engine exhaust pipes, boiler combustors, burners |
|
430
|
430 is the
basic ferritic steel type. 430 is known for
low thermal expansion rate and excellent drawing
and oxidation resistance. |
Heat resistant
tools, burners, home appliances, sink covers,
building materials, nuts and bolts, CD Bars,
mesh |
|
430J1L
|
Adding
Mo,Ti and Nb results in good corrosion resistance,
weldability and high temperature oxidation
resistance. |
Washing
machine drums, automobile exhaust pipes, electric
appliance parts, three-layer laminated bottom
pots. |
|
436L
|
Adding Mo,Ti
and Nb results in excellent corrosion resistance,
drawability and weldability. |
Automobile
exhaust pipes, warm water supply facilities. |
|
Martensitic
|
410
|
410 is the
basic martensite steel type known for its
good strength but it is not suitable for uses
in harsh/severe corrosion conditions. 410
hardens with heat treatment (magnetic). |
General knife,
machine parts, petroleum refining apparatus,
bolts, nuts, pump shafts, spoons, forks |
|
420J1
|
In quenching
condition, has high strength and good corrosion
resistance (magnetic) |
Tweezers,
dinner knives, turbine blades |
|
420J2
|
Compared to
420J1, higher post-quenching strength (magnetic). |
Knife blades,
nozzles, valves, rulers, scissors, general
knives |
