What is 430 stainless steel?
430 stainless steel is in the ferritic family of stainless steel.
This means it is considered to have a ‘moderate-to-good’ level of
corrosion resistance. This is due to the higher level of chromium.
430 stainless steel contains between 16-18% of chromium. However,
its nickel content is very low, typically less than 1%. In
addition, 430 stainless steel contains trace amounts of manganese,
silicon, carbon, sulfur, and phosphorus.
This chemical composition means that 430 stainless steel contains
high thermal conductivity.
It is commonly used in applications where corrosion resistance is
required, such as automotive trim, kitchen appliances, and food
processing equipment. Due to its aesthetically appealing look, 430
is also used in various decorative applications.
GOOD MACHINABILITY
The corrosion resistance qualities are good, but they are not as
good as the austenitic grades 301, 302 and 304. The alloy benefits
from good formability and is readily weldable although not suitable
for rigorous service. Machinability is also good, although there is
a possibility of galling. Type 430 stainless steel is commonly used
in the production of domestic appliances and is also used in the
automotive sector for trim parts.
Features of 430 Stainless Steel
Type 430 stainless is a ferritic stainless steel with good
corrosion resistance and is resistant to nitric acid. The alloy is
readily weldable but is not suitable for rigorous service.
Machinability is very good and galling is a possibility.
Compostion of 430 Stainless Steel
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|
| 430 | 0.12 | 1.00 | 1.00 | 0.04 | 0.03 | 16.0 -18.0 | - | -0.75 | - |
Mechanical Properties of 430 Stainless Steel
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness |
|---|
| | | | Rockwell B (HR B) max | Brinell (HB) max |
| 430 | 450 | 205 | 22 | 89 | 183 |
Commercial applications for this engineering material include:
- Cabinet hardware
- Automotive trim
- Hinges
- Drawn and formed parts
- Stampings
- Refrigerator cabinet panels
We stock Type 430 in round bar, plate, sheet, strip, square tube,
square bar and hexagon bar.
What is the difference between 304 and 430 stainless steel?
One of the main differences between 430 and 304 stainless steel is
their magnetic properties. 304 stainless steel, which is in the
austenitic family, is non-magnetic, while 430 stainless steel is
magnetic. This is due to the difference in the chemical composition
of the two grades, with 430 stainless steel containing more
ferrite, which is a type of iron oxide that is magnetic.
304 stainless steel is slightly more corrosion resistant than 430
stainless steel, containing around 18% chromium and 8% nickel. This
compares to 430 stainless steel, which contains about 16% chromium
and 0% nickel.What is the difference between 316 and 430 stainless steel?
Another comparable grade to 430 stainless steel also comes from the
austenitic family:316 stainless steel.
The biggest difference in the grades is the presence of molybdenum
in 316 stainless steel. This increases its corrosion resistance and
makes it more durable than 430 stainless steel.
316 stainless steel is commonly used in the food and pharmaceutical
industries because it is resistant to corrosion caused by acidic
foods and beverages. It is also known as "marine grade" stainless
steel because it is resistant to corrosion caused by saltwater.Is 430 stainless steel rust proof?
Like all stainless steel grades, 430 stainless steel contains a
passive film that generally combats against corrosion. This is due
to the chromium (all stainless steel contains at least 10.5%)
reacting with oxygen to form a passive layer (hydrated chromium
oxide) which can rebuild if damaged mechanically.
While this does not mean that 430 stainless steel is rust-proof,
the lower amount of chromium than other grades of stainless steel
make it less resistant to corrosion and staining.Is 430 stainless steel food grade?
Food-grade stainless steels contain higher levels of chromium and
nickel, which means 430 stainless steel is not considered
food-grade. Again, this comes down to the lower amount of chromium
than other grades of stainless steel, which makes it less resistant
to corrosion and staining.
