Super Duplex Stainless steel UNS S32760
Super Duplex Stainless Steel refers to the dual-phase austenite and ferrite phases stainless steels,having exceptionally high strength and superior corrosion resistance—especially against pitting, crevice corrosion, and stress-corrosion cracking in chloride enviorement.
ASTM A182 F55 round bar, made from UNS S32760 Super Duplex stainless steel, delivers exceptional mechanical strength, corrosion resistance, and durability,It can be used as the material for the A182 F55 forged flanges.
UNS S32760 is a super duplex stainless steel, with the chromium content of about 25%, that is also referred to as DIN 1.4501 and ASTM A182 F55 (when supplied as solid bars). it is also known as Zeron 100.
UNS S32760 is a super duplex stainless steel in American standards. Its composition is characterized by adding a small amount of W and Cu on the basis of high Cr, Mo, and N. This not only improves the casting performance , reduces the content of the precious metal Mo, and enhances the steel’s resistance to chloride ion pitting. The minimum guaranteed value of the pitting resistance equivalent number (PRE) is 40. Moreover, it has good resistance to pitting corrosion, crevice corrosion, and intergranular corrosion. It is mainly applied in corrosive environments in fields such as petroleum, natural gas, chemical industry, and shipping. Thus, it becomes an ideal material for various corrosion – resistant industrial application fields
ASTM A182 F55 specification
Material Grade: ASTM A182 F55 / UNS S32760
Type: Super Duplex Stainless Steel
Form: Round Bar / Rod
Size Range: 6mm – 300mm diameter (custom sizes available)
Length: Up to 6 meters or as specified
Finish: Bright, black, rough turned, or polished
1. Chemical Composition of UNS S32760
| Element | F55 (UNS S32760) |
| Carbon (C) | ≤ 0.030 wt % |
| Manganese (Mn) | ≤ 1.00 wt % |
| Phosphorus (P) | ≤ 0.030 wt % |
| Sulfur (S) | ≤ 0.010 wt % |
| Silicon (Si) | ≤ 1.00 wt % |
| Chromium (Cr) | 24.00–26.00 wt % |
| Nickel (Ni) | 6.00–8.00 wt % |
| Molybdenum (Mo) | 3.00–4.00 wt % |
| Copper (Cu) | 0.50–1.00 wt % |
| Nitrogen (N) | 0.20–0.30 wt % |
| Tungsten (W) | 0.50–1.00 wt % |
2. Mechanical Properties
Property F55 (UNS S32760)
Tensile Strength 930 MPa
Yield Strength 690 MPa
Elongation ≥ 35 %
Hardness ~270HB
Our ASTM A182 F55 round bars offer exceptional mechanical properties and corrosion resistance in demanding environments. Made from Super Duplex Stainless Steel (UNS S32760), F55 bars are ideal for offshore, petrochemical, power generation, and marine applications.
Mill Test Certificate (MTC) as per EN 10204 3.1 / 3.2
What to know the difference between ASTM A182 F53 and A182 F55?
Corrosion Test Compaison between UNS S32760 and UNS S32205,316L
| Steel Grade | Corrosion Time / h | Corrosion Rate / (g⋅(m2⋅h)−1) | |
|---|---|---|---|
| Corrosion Temperature 25 °C | Corrosion Temperature 50 °C | ||
| S32760 | 72 | 0.002 | 0.002 |
| S32205 | 72 | 0.003 | 0.784 |
| S31803 | 72 | 0.002 | 0.816 |
| 904L | 72 | 0.003 | 4.416 |
| 316L | 72 | 1.983 | 25.17 |
Note: Corrosion rate (g/(m2⋅h)) = Weight loss (g) / (Specimen surface area (m2) × Test time (h)).
