Top 4 stainless steel 303F, 318, 314, 330 special and rare in the market

In Vietnam, stainless steel types such as sus304, sus201, sus316, sus310 … are popularly used in the market. But do you know some rare special stainless steels in the market with few users such as value and high price? Let’s explore some rare stainless steel grades through this article.

1. Inox Sus303F

Stainless steel Sus303F has non-magnetic properties, it is not possible to apply the heating method. A feature of stainless steel 303 is higher processing strength than sus304. In addition, 303F stainless steel also has heat resistance and abrasion resistance from high acid.

Application of stainless steel 303F: they are used in parts of lathes, bolts, screws, parts for connecting parts in machinery.

Chemical composition

C
(≤ %)
Si
(≤ %)
P
(≤ %)
Mn
(≤ %)
Ni
(≤ %)
S
(≤ %)
Cr
(≤ %)
Cu
(≤ %)
0.050.20.032.008.60.03217.0-19.02.92

2. Stainless steel 318Ln / 1.4462

Stainless steel 318Ln with equivalent steel grade is 1,4462 stainless steel including duplex austenitic-ferritic chromium-nickel-molybdenum stainless steel.

– The stainless steel 316Ln / 1.4462 of the Duplex system has anti-convex and corrosion resistance.

Application: chemical industry, petrochemical industry, offshore, sea water pipeline, seawater desalination plant, nuclear technology, paper and cellulose production.

Chemical composition

C
(≤ %)
Si
(≤ %)
P
(≤ %)
Mn
(≤ %)
Ni
(≤ %)
S
(≤ %)
Cr
(≤ %)
Mo
(≤ %)
N
(≤ %)
0.0301.000.0352.004.5-6.50.01521.0-23.02.5-3.50.1-0.22

3. Stainless steel 314

– Stainless steel 314 has high heat resistance in chromium-nickel steel line. However, this steel will become brittle when processed at a temperature of 649-816 degrees Celsius

– Application of stainless steel 314: used in industry, parts and equipment such as radioactive tubes, equipment for furnaces, components for heat treatment equipment, composting and cartburizing boxes. The properties of 314 stainless steel are suitable for making cool parts or technical details that require working in high-intensity environments.

-Chemical composition

C
(≤ %)
SiP
(≤ %)
Mn
(≤ %)
NiS
(≤ %)
Cr
0.251,5-3.00.045219-220.0323-26

4. Stainless steel 330

Stainless steel 330 is austenite, nickel-chromium-silicon stainless steel with outstanding resistance and oxidation process up to 2200 degrees F. Sus330 has a nickel content of 34 to 37% so it is resistant to eating wear, ductility and high durability. So the treated sus330 provides corrosion resistance and high temperature exposure even in the most demanding environment.

Stainless steel application 330:

– Chemicals and petrochemical processing: cracking of ammonia components, petrochemical furnace parts, heat exchangers, flares ..

.- Exothermic process: heat treatment furnace and compartment, high temperature fan, salt basin.

– Processing ore, perlite systems and equipment, boiler equipment, gas turbine components …

C
(≤ %)
SiP
(≤ %)
Mn
(≤ %)
NiS
(≤ %)
Cr
0.081.00-1,50.032.0034.0-37.00.0318.0-22.0

These are special types of stainless steel in Vietnam market, with high demand and technical requirements. In addition, sus310S, sus630 and sus 309 stainless steel are also high-quality stainless steel products on the market and are often used for high-quality, demanding specifications.