|
|
Classification
|
Features
|
Uses
|
| 304(L) |
- Basic kind
in the Austenite series
-
Superior corrosion and heat
resistance
- Superior low
temperature strength and mechanical
properties
- No magnetism
and no hardening with the thermal
processing
|
- food industry
facilities, general chemical
facilities, uses for nuclear
power
generation facilities,
pipes, storages and heat resisting
components
- Machinery and
tools used in the chemical and
heat resisting components
|
| 310(L) |
- Possible to
be stronger hardening by the
quenching and tempering rolling
with lower Ni and Cr and higher
N containing than 304 steel(the
unstable Austenite structure
turns into the Martensite structure)
- Show superior
weight-lowering, stability and
economical efficiency when applied
to rail motors with more high-temperature
strength, fatigue strength and
corrosion resistance than steel
and Al.
|
- Railroad cars,
belt conveyers, bolts and nuts
- Interior and
exterior materials of railroad
cars and uses for structures
|
| 305 |
- Non magnetism
steel intensified Ni comparing
to 304
- No magnetism with
the processing
- Superior
plasticity and mainly used for
components of electronic products
|
- Dinnerware(DD),
electric parts, used in
special drawing and cold heading
|
| 316(L) |
- Superior pitting
corrosion resistance by adding
Mo(2~3%)
- Superior high
temperature Creep intensity
-
Apply to severer environment
where 304 is inappropriate.
|
- Pipes, tanks
for the chemical
(paper and
fertilizer industry)
- Pipes,
tanks for the chemical, components
of welding parts
|
| 321 |
- Used in the
sensitization section
(450~850℃)
|
- Heat exchangers
in boilers, pipes,
equipments
for the chemical and pipes
of
the aircraft
|
| 409(L) |
- Heat resisting
steel added Nitrogen stablization
elements like Ti
- Ferrite
stainless steel with Cr(11%)
showing a perfect BCC structure
in high temperature and normal
temperature
- Superior expansion,
high temperature corrosion resistance,
and weldability
|
- Exhaust pipes
in vehicles and heat exchangers
|
| 410(L) |
- Superior toughness
and higher intensity
- Securing
mechanical properties mainly
by thermal processing after
quenching
(410 steels)
-
Production-costs effective,
good plasticity but vulnerable
in corrosive environment
|
- 1st class
dinnerware
- Container frames,
Burners and exhaust equipments
in vehicles
|
| 420J1/J2 |
- Higher carbon
Martensite steel and super
ior
quenching hardening
- Used
in the materials required high
intensity mechanical properties
|
- Dinner knives,
turbine blades
- Knives, scissors,
nozzles and valves
|
| 430 |
- Commonly used
Ferrite stainless steel for
non thermal hardening
- Contain
17% of Cr, the structure in
high temperature but the simple
- BBC structure not lower
than 1000℃
- Magnetism and
ridging and stretcher strain
occurrence
|
- Electric parts,
upper plates of gas stoves,
the 2nd class dinnerware and
interior materials in construction
|
| 444 |
- A little less
plasticity and weldability than
304 steel by 400 series strainless
steels's own properties, but
enhanced plasticity with extremely
minute C+N
- With adding
a stablizing element Nb, new
type of steel for water tanks
improved corrosion resistance
, softness and higher resistance
to stress, corrosion and cracking
and possible to omit the thermal
processing before and after
welding by having a fully Ferrite
structure
|
- Used for drinking-water
equipments such as water tanks
with high capacity, water reservoirs
solar energy water heater, electric
water heater
|
