As the most widely used austenitic stainless steels globally,300 series deliver exceptional corrosion resistance through their optimized chromium-nickel-molybdenum composition.

301

Grade 301 stainless steel is an austenitic chromium-nickel alloy engineered for exceptional work hardening, achieving high strength through cold deformation while maintaining excellent formability in annealed states.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Mo%
Cu%
N%
Min
---
---
---
---
---
16.00
6.00
---
---
---
Max
0.15
1.00
2.00
0.045
0.030
18.00
8.00
---
---
---

304

Grade 304 stainless steel is a supremely versatile austenitic alloy (18% Cr, 8% Ni), recognized for its exceptional corrosion resistance, balanced fabrication characteristics, and extensive applicability across industries.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Mo%
Cu%
N%
Min
---
---
---
---
---
18.00
8.00
---
---
---
Max
0.08
1.00
2.00
0.045
0.030
20.00
10.50
---
---
0.10

304L

Grade 304L stainless steel (18% Cr,8% Ni, ≤0.03% C) is the low-carbon variant of 304, engineered to resist sensitization and intergranular corrosion in welded fabrication for chemical processing equipment and structural components.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Mo%
Cu%
N%
Min
---
---
---
---
---
18.00
8.00
---
---
---
Max
0.03
1.00
2.00
0.045
0.030
20.00
12.00
---
---
0.10

QN1803(304D)

Developed by China’s Tsingshan Group, QN1803 is a high-nitrogen, corrosion-resistant, nickel-saving austenitic stainless steel that delivers superior pitting and crevice corrosion resistance in chloride environments (e.g., seawater, salt spray) compared to conventional 304. While maintaining equivalent general corrosion resistance, this alloy achieves ≥15% cost reduction versus 304, offering enhanced cost-performance efficiency for marine and industrial applications.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Cu%
N%
Min
---
---
4.00
---
---
17.50
2.50
0.50
0.2
Max
0.10
1.00
7.00
0.050
0.010
19.50
4.00
2.50
0.3

316L

Grade 316L stainless steel delivers enhanced pitting resistance in chloride environments through molybdenum addition, making it the benchmark material for pharmaceutical equipment, marine hardware, and biomedical implants.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Mo%
Min
---
---
---
---
---
16.00
10.00
2.00
Max
0.03
0.75
2.00
0.045
0.030
18.00
14.00
3.00

316Ti

Grade 316Ti is a titanium-stabilized austenitic stainless steel (Ti≥5×C%) that significantly enhances intergranular corrosion resistance by suppressing chromium carbide precipitation. It delivers superior corrosion performance over conventional 316 in aggressive media containing sulfuric, phosphoric, acetic acids and other organic acid environments.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Mo%
Ti%
N%
Min
---
---
---
---
---
16.00
10.00
2.00
5×C
---
Max
0.08
1.00
2.00
0.045
0.030
18.00
14.00
3.00
0.70
0.10

321

Grade 321 stainless steel is primarily deployed in combustion ducts for petrochemical equipment, boiler heat exchangers, high-temperature aircraft components, and chemical transport systems requiring intergranular corrosion resistance. While exhibiting physical properties comparable to 304, its titanium micro-alloying design (Ti≥5×C%) delivers superior high-temperature oxidation resistance and long-term durability under cyclic thermal loading up to 900°C.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Ti%
N%
Min
---
---
---
---
---
17.00
9.00
5×(C+N)
---
Max
0.08
0.75
2.00
0.045
0.030
19.00
12.00
0.70
0.100

309S

Grade 309S stainless steel delivers superior oxidation resistance up to 980°C due to its high chromium-nickel content, making it essential for furnace components, radiant tubes, and thermal processing fixtures in aggressive heat-treat environments.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
N%
Min
---
---
---
---
---
22.00
12.00
---
Max
0.08
1.00
2.00
0.045
0.030
24.00
15.00
0.10

310S

Grade 310S stainless steel provides exceptional oxidation resistance up to 1150°C and carburization resistance in reducing atmospheres, serving as the premier solution for radiant tubes, pyrolysis furnaces, and ceramic kiln components under continuous thermal cycling.

Item
C%
Si%
Mn%
P%
S%
Cr%
Ni%
Min
---
---
---
---
---
24.00
19.00
Max
0.08
1.50
2.00
0.045
0.030
26.00
22.00
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