Category
| Steel type
| Main chemical components (%)
|
| Characteristics and applications
|
C
| Cr
| Ni
| Mo
| Cu
| Other
|
Austenitic products |
SUS 304 |
≦0.08 |
18.00`20.00 |
8.00`10.50 |
|
|
|
7.93 |
Austenitic stainless steels are used typically as follows.
Household items, Construction materials, Food production, Chemical manufacture, Nuclear installations, Low-temperature and other applications
|
SUS 304L |
≦0.03 |
18.00 `20.00 |
9.00 `13.00 |
|
|
|
7.93 |
304 low-carbon steel has excellent intergranular corrosion resistance. For welded structures. |
SUS 316 |
≦0.08 |
16.00`18.00 |
10.00`14.00 |
2.00`3.00 |
|
|
7.98 |
Acid and pitting corrosion resistance better than 304, also highly resistant to high temperature creep. Used in chemical and fiber-pulping equipment. |
SUS 316L |
≦0.03 |
16.00
`18.00 |
12.00
`15.00 |
2.00
`3.00 |
|
|
7.98 |
316 low-carbon steel, with intergranular corrosion resistance. |
SUS 317L |
≦0.03 |
18.00
`20.00 |
11.00
`15.00 |
3.00
`4.00 |
|
|
7.98 |
317 low-carbon steel, with intergranular corrosion resistance. |
Two-phase products* |
SUS 329J4L |
≦0.03 |
24.00`26.00 |
5.50`7.50 |
2.50`3.50 |
|
N0.08`0.30 |
7.80 |
Excellent pitting corrosion resistance in chloride environments, resistant to urine, phosphates, sour gas, etc. Also high strength. Used in manufacture of chemical fertilizers and seawater heat exchangers. |
Ferritic products |
SUS 430 |
≦0.12 |
16.00`18.00 |
|
|
|
|
7.70 |
Ferritic stainless steels are used typically as follows.
Commercial kitchen equipment, household goods, autoparts.
|
SUS 444 |
≦0.025 |
17.00`20.00 |
|
1.75`2.50 |
|
Nb8x
(%{N%)`0.80N≦0.025 |
7.75 |
Extremely low carbon 18Cr-2Mo steel. Better corrosion resistance than 304, also resistant to stress corrosion cracking. Used in boilers, water tanks, solar water-heaters, heat exchangers and food-production machinery, etc. |
Precipitation-hardened products |
SUS 630 |
≦0.07 |
15.00`17.50 |
3.00`5.00 |
|
3.00`5.00 |
Nb0.15`0.45 |
7.80 |
Precipitation-hardened steel by addition of copper. Similar corrosion resistance to 304, high abrasion resistance. Used in turbine parts, shaft materials and push plates. |