Main Product and feathres
Through automated manufacturing facilities, we produce one step advanced products
superior products can be produced when they are supported by good materials, high level of technology, as well as reasonable and efficient manufacturing process.
Through ongoing investments in new facilities and accumulation of new technology, plus stringent quality controls, ST TUBULAR is able to enchance its product competitiveness.
|
Classification |
Specification |
Usage |
|
Stainless
steel tube and pipe |
KS D 3595 JIS G 3448 ASTM A269 |
Pipes for water supply, drainage,
piping of cold / hot water and other piping |
|
Stainless
steel for boiler & heat exchanger tubes |
KS D 3577 JIS G 3463 ASTM A249 / A688 |
Boiler parts, heat exchanger pipes
used in chemical and petroleum industry |
|
Sanitary
stainless steel tubes |
KS D 3585 JIS G 3447 ASTM A270 |
Food industry, chemical industry,
natural gas industry, building material |
|
Steel
Grade |
Features |
Usage |
|
304 |
Most widely used steel grade. Good
corrosion resistance, thermal resistance, low-temperature strength and
mechanical properties. Good drawability such as deep
drawing, bending and does not harden during heat treatment. Non-magnetic. |
Facilities in chemical, food and
dairy industries, sinks, interior piping, hot – water boilers, vessel parts,
medical instruments, building materials. |
|
304L |
Low carbon Ni-Cr steel, normal
conditions, it has corrosion resistance that is similar to 304 grade. But,
excellent resistance to inter-granular corrosion after welding and stress
relieving. |
Machinery and tools used in the
chemical coal, textile, nuclear energy and petroleum industry that require
high inter – granular corrosion resistance, building materials, heat
resistant parts that are difficult to implement heat treatment on. |
|
316 |
Excellent corrosion resistance,
pitting corrosion resistance and high temperature strength by adding Mo &
Ni 2%, Useful in severe/harsh conditions. Excellent drawing hardening.
Non-magnetic. |
Sea water equipment, equipment for
chemicals, paper, dye, acetic acid, fertilizer, photo & food industry.
construction in coastal areas, ropes, nuts and bolts part. |
|
316L |
Lower carbon Ni – Cr steel type by
adding Mo. It has the normal properties of 316 grade, but with excellent
inter – granular corrosion resistance after welding and stress relieving. |
Pulp, paper, chemical fiber, dye,
mesh, phosphoric acid manufacturing facilities. |
|
Classification |
Types of
steels |
Chemical
composition(%) |
|||||
|
KS(JIS) |
POSCO |
C |
Cr |
Ni |
Mo |
Others |
|
|
AUSTENITE |
202(ASTM) |
≤0.15 |
17.0~19.0 |
4.0~6.0 |
- |
N ≤ 0.25 |
|
|
20(AISI) |
0.12~0.25 |
16.5~18.0 |
1.0~1.75 |
- |
N 0.32~0.40 |
||
|
304 |
304 |
≤0.08 |
18.0~20.0 |
8.00~10.50 |
- |
- |
|
|
304L |
304L |
≤0.03 |
18.0~20.0 |
8.00~13.00 |
- |
- |
|
|
316 |
316 |
≤0.08 |
16.0~18.0 |
10.00~14.0 |
2.00~3.00 |
- |
|
|
316L |
316L |
≤0.03 |
16.0~18.0 |
10.00~15.00 |
2.00~3.00 |
- |
|
|
FERRITE |
409L |
409L |
≤0.03 |
10.5~11.75 |
- |
- |
Ti 6xC%~0.75 |
|
439L |
439L |
≤0.03 |
17.0~20.0 |
- |
- |
Ti, Nb 8x(C%+N%)~0.80 N ≤ 0.03 |
|