EN 1.4501 / SUPER DUPLEX UNS S32760 / F55
MATERIAL DESCRIPTION
Super Duplex UNS S32760 is among the most common super duplex grade in the market. UNS S32760 is a duplex stainless steel especially designed for service in aggressive chloride-containing environments and has additions of W and Cu compared to UNS S32750. It has very good resistance to localized corrosion and stress corrosion cracking in combination with high mechanical strength.
Applications
The main applications are for details with special requirements for high corrosion resistance.
UNS S32760 is characterized by:
- High resistance to stress corrosion cracking in halide containing environments.
- High resistance to pitting and crevice corrosion.
- High resistance to general corrosion.
- High mechanical strength.
- High resistance to erosion corrosion and corrosion fatigue.
It is widely used in oil & gas, hydropower, pressure vessels, pulp & paper, structural components and chemical tankers.
Heat Treatment
Solution annealing at 1100°C followed by water quenching.
Weldability
Very good.
Chemical composition
| Weight % | C | Si | Mn | S | P | Cr | Ni | Mo | N | Cu | W |
| Min. | 24,00 | 6,00 | 3,00 | 0,20 | 0,50 | 0,50 | |||||
| Max. | 0,030 | 1,00 | 1,00 | 0,010 | 0,030 | 26,00 | 8,00 | 4,00 | 0,30 | 1,00 | 1,00 |
PREN= (Cr%+3.3Mo%+16N%) ≥ 40
Product Standards: EN 10088-3, ASTM A276, ASTM A479, ASTM A182–11A
(Chemical composition and mechanical properties only)
Approvals: NACE MR0175, NORSOK M650, NORSOK M630 MDS D53/ D54/ D55/ D57
Mechanical Properties
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HB] |
Impact, Charpy-V, -46ºC [J] |
Pre | |
| BAR | ≥ 550 | ≥ 750 | ≥ 25 | ≤ 310 | ≥ 45 | ≥ 40 |
| PLATE CR (COIL) | ≥ 550 | 750 – 1000 | ≥ 25 | ≤ 310 | ≥ 45 | ≥ 40 |
| PLATE HR (COIL) | ≥ 550 | 750 – 930 | ≥ 25 | ≤ 310 | ≥ 45 | ≥ 40 |
| PLATE (QUARTO) | ≥ 550 | 750 – 930 | ≥ 25 | ≤ 310 | ≥ 45 | ≥ 40 |
Round Bar Stock
| DIA | KG/M |
| 12,7 mm | 1.1 |
| 15,87 mm | 1.5 |
| 19,05 mm | 2.3 |
| 25,4 mm | 4.2 |
| 31,75 mm | 6.2 |
| 38,1 mm | 9.2 |
| 44,5 mm | 12.7 |
| 50,8 mm | 16.2 |
| 60 mm | 22.6 |
| 70 mm | 30.8 |
| 76,2 mm | 36.6 |
| 80 mm | 40.2 |
| 90 mm | 50.9 |
| 101,6 mm | 64.7 |
| 120 mm | 90.5 |
| 127 mm | 104.7 |
| 130 mm | 106. |
| DIA | KG/M |
| 140 mm | 123 |
| 152 mm | 147 |
| 160 mm | 162 |
| 170 mm | 182 |
| 180 mm | 204 |
| 203,2 mm | 258 |
| 220 mm | 304 |
| 230 mm | 333 |
| 240 mm | 362 |
| 254 mm | 402 |
| 280 mm | 493 |
| 300 mm | 566 |
| 304,8 mm | 579 |
| 330 mm | 686 |
| 355,6 mm | 797 |
| 380 mm | 910 |
| 406,4 mm | 1040 |
Equivalent Standards
- EN 1.4501
- UNS S32760
- Grade F55
- (Zeron 100)