Alloy family
Special Stainless Steels — Duplex, Super Austenitic and Precipitation Hardening
Beyond standard 304/316L, Hangbo focuses on 904L, 254SMO, 2205 duplex, 2507 super duplex, 17-4PH, 15-5PH, 310S and 321 for high-chloride, high-temperature oxidation and high-strength service.
Why specify this alloy family
Duplex strength
2205 / 2507 yield roughly twice that of 316L
Chloride resistance
254SMO for high-chloride seawater
Precipitation hardening
17-4PH reaches HRC 40+ after ageing
Grades in this family
| Grade | UNS | Density | Tensile | Max service temp. | Detail |
|---|---|---|---|---|---|
| Duplex Stainless Steel 2205 | S32205 | 7.80 g/cm³ | ≥ 620 MPa | 300 °C | see Duplex Stainless Steel 2205 data |
| Stainless Steel 17-4PH | S17400 | 7.80 g/cm³ | ≥ 1310 MPa（H900） | 300 °C (caution above H900) | see Stainless Steel 17-4PH data |
| Stainless Steel 304 | S30400 | 7.93 g/cm³ | ≥ 515 MPa | 870 °C | see Stainless Steel 304 data |
| Stainless Steel 309S | S30908 | 7.98 g/cm³ | ≥ 515 MPa | 1000 °C (continuous oxidation) | see Stainless Steel 309S data |
| Stainless Steel 310S | S31008 | 7.98 g/cm³ | ≥ 515 MPa | 1100 °C (continuous oxidation) | see Stainless Steel 310S data |
| Stainless Steel 316 | S31600 | 8.00 g/cm³ | ≥ 515 MPa | 800 °C | see Stainless Steel 316 data |
| Stainless Steel 316L | S31603 | 8.00 g/cm³ | ≥ 485 MPa | 800 °C | see Stainless Steel 316L data |
| Stainless Steel 904L | N08904 | 8.00 g/cm³ | ≥ 490 MPa | 400 °C | see Stainless Steel 904L data |
Select any grade for full chemical composition, mechanical properties, standards and applications.
Grade data sheets
Duplex Stainless Steel 2205UNS S32205 · ≥ 620 MPa tensile · 300 °C maxstainless-2205
Stainless Steel 17-4PHUNS S17400 · ≥ 1310 MPa（H900） tensile · 300 °C (caution above H900) maxstainless-17-4ph
Stainless Steel 304UNS S30400 · ≥ 515 MPa tensile · 870 °C maxstainless-304
Stainless Steel 309SUNS S30908 · ≥ 515 MPa tensile · 1000 °C (continuous oxidation) maxstainless-309s
Stainless Steel 310SUNS S31008 · ≥ 515 MPa tensile · 1100 °C (continuous oxidation) maxstainless-310s
Stainless Steel 316UNS S31600 · ≥ 515 MPa tensile · 800 °C maxstainless-316
Stainless Steel 316LUNS S31603 · ≥ 485 MPa tensile · 800 °C maxstainless-316l
Stainless Steel 904LUNS N08904 · ≥ 490 MPa tensile · 400 °C maxstainless-904l
Available product forms
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