EN 1.4501 / SUPER DUPLEX UNS S32760 / F55
MATERIAL DESCRIPTION
All our super-duplex materials are produced by Norsok M-650 Ed.4 and/ or ISO 17782 qualified manufacturers.
Super Duplex UNS S32760 is among the most common super duplex grade in the market. UNS S32760 is a duplex 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 in the range of 1120°C followed by water quenching.
Weldability
Very good.
Chemical Composition (Specific for Bars)
| Weight % | C | Mn | P | S | Si | Cr | Ni | Mo | N | Cu | W | PREN |
| Min. | 24,0 | 6,00 | 3,00 | 0,20 | 0,50 | 0,50 | 40 | |||||
| Max. | 0,030 | 1,00 | 0,025 | 0,010 | 1,00 | 26,0 | 8,00 | 4,50 | 0,30 | 1,00 | 1,00 |
PREN = % Cr+3.3 % Mo+16 % N ≥ 40
Reference Standards
General:
- Norsok M-650 Ed.4 qualified manufacturers
- PED 2014/68/EU Annex I section 4.3
- AD2000 W0 (W2/W10)
- NACE MR0175/ISO 15156-3 and NACE MR0103/ ISO 17945
Plate, sheet and coil:
-
ASTM A240, EN 10028-7, EN 10088-2, EN 10088-4, Norsok M-630 MDS D55
Bar and forging:
-
ASTM A276, ASTM A479, ASTM A182, EN 10088-3, Norsok M-630 MDS D54/ D57
Other products:
-
As per applicable ASTM and/or EN standards and Norsok M-630 MDS
Mechanical Properties (Typical)
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HB] |
Impact, Charpy-V, -46ºC [J] |
|
| BAR | ≥ 550 | ≥ 750 | ≥ 25 | ≤ 300 | ≥ 65 |
| PLATE CR (COIL) | ≥ 550 | 750 – 1000 | ≥ 25 | ≤ 310 | ≥ 45 |
| PLATE HR (COIL) | ≥ 550 | 750 – 1000 | ≥ 25 | ≤ 310 | ≥ 45 |
| PLATE (QUARTO) | ≥ 550 | 750 – 930 | ≥ 25 | ≤ 310 | ≥ 45 |
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)