EN 1.4482 / LEAN DUPLEX UNS S32001 / SS LD24
MATERIAL DESCRIPTION
Sverdrup Steel SS LD24 is a low alloyed Lean Duplex stainless steel developed with increased Cr, Mo and N content to achieve a PRE of ≥24. The microstructure consists of a phase balance of approximately 50 % ferrite and 50 % austenite that provides much higher yield strength than AISI 304 and AISI 316. Also, it exhibits good formability and corrosion resistance.
Applications
The main applications are for details with corrosion resistance better than 304L.
UNS S32001 is characterized by:
• Good resistance to stress corrosion cracking.
• Good resistance to general corrosion.
• High mechanical strength.
• High resistance to erosion corrosion and corrosion fatigue.
Heat Treatment
Solution annealing at 1020 – 1100°C followed by water quenching.
Weldability
Very good.
Chemical Composition
| Weight % | C | Si | Mn | S | P | Cr | Ni | Mo | N |
| Min. | 4,00 | 19,50 | 1,50 | 0,05 | |||||
| Max. | 0,030 | 1,00 | 6,00 | 0,015 | 0,035 | 21,50 | 3,00 | 0,60 | 0,17 |
PRE value %Cr + 3.3%Mo + 16%N of ≥24
Product Standards: EN 1,4482, UNS S32001, EN 10088-2, EN 10088–4, EN 10028–7, ASTM A240, ASTM A480, ASME SA240
Approvals: Sverdrup Steel MDS SS LD24
Mechanical Properties
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HB] |
Surface | |
| CR (COIL) | ≥ 530 | 700-900 | ≥ 25 | 2B | |
| HR (COIL) | ≥ 480 | 660-900 | ≥ 30 | ≤ 290 | 1D |
| PLATE | ≥ 450 | 650-850 | ≥ 30 | ≤ 290 | 1D |
Plate Stock
| MEASUREMENTS | KG/PLATE |
|---|---|
| 1,5 x 1500 x 3000 mm | 54 |
| 1,5 x 1500 x 6000 mm | 108 |
| 2 x 1500 x 3000 mm | 72 |
| 2 x 1500 x 6000 mm | 144 |
| 2,5 x 1500 x 3000 mm | 90 |
| 2,5 x 1500 x 6000 mm | 180 |
| 3 x 1500 x 3000 mm | 108 |
| 3 x 1500 x 6000 mm | 216 |
| 4 x 1500 x 3000 mm | 144 |
| 4 x 1500 x 6000 mm | 288 |
| 5 x 1500 x 3000 mm | 180 |
| 5 x 1500 x 6000 mm | 360 |
| 6 x 1500 x 3000 mm | 216 |
| 6 x 1500 x 6000 mm | 432 |
| 8 x 1500 x 3000 mm | 296,64 |
| 8 x 1500 x 6000 mm | 593,28 |
| 10 x 1500 x 3000 mm | 370,80 |
| 10 x 1500 x 6000 mm | 741,60 |
| 12 x 1500 x 3000 mm | 444,96 |
| 12 x 1500 x 6000 mm | 889,92 |
| 15 x 1500 x 3000 mm | 556,20 |
| 15 x 1500 x 6000 mm | 1112,40 |
| 20 x 1500 x 3000 mm | 741,60 |
| 20 x 1500 x 6000 mm | 1483,20 |
| 25 x 1500 x 3000 mm | 927 |
| 25 x 1500 x 6000 mm | 1854 |
| 30 x 1500 x 3000 mm | 1112,40 |
| 30 x 1500 x 6000 mm | 2224,80 |
Equivalent Standards
- EN 1.4482
- UNS S32001