| C | Si | Mn | P | S | Cr | Mo | Ni | N | Others |
| ≤0.03 | ≤0.8 | ≤1.2 | ≤0.035 | ≤0.02 | 24.0-26.0 | 3.0-3.5 | 6.0-8.0 | 0.24-0.32 | Cu ≤0.5 |
Chemical Composition
Mechanical Properties
|
0.2% Proof Stress |
550 N/mm2 |
|
Tensile Strength |
750 N/mm2 |
|
Elongation, 5.65√S0 |
25% |
|
Reduction of area |
45% |
|
Hardness (Brinell) |
270 max. |
|
Impact Strength (Room Temp) |
80J |
|
Impact Strength (-46oC) |
60J av (45J min) |
Physical Properties
|
Density (Kg/m3) |
7810 |
|
Magnetic Permeability (20°C) |
33 |
|
Young’s Modulus (kN/mm2) |
199 |
|
Specific Electrical Resistance, 20°C (µΩ.m) |
0.8 |
|
Mean coefficient of thermal expansion, 20-300°C (m/m/oC) |
11.1 x 10-6 |
|
Specific Heat, 20°C (J/kg.K) |
475 |
|
Thermal conductivity, 20°C (W/m.K) |
14.2 |
|
Fracture Toughness, kQ (MPa/m2) |
98 |
Applications
Process industry components in nitric acid, dioxide, polypropylene & PVC production, caustic evaporators
Equipment handling organic & fatty acids
Marine industry and shipbuilding propellers, shafts, rudders, shaft seals, pumps, bolts, fasteners, valves,
instrumentation
Oil and chemical tankers
Oil & Gas industry pumps, valves, pipe, vessels, wellhead equipment, subsea equipment
Pollution control systems, fans and pumps, wet scrubbers, incinerators, flue gas desulphurization (FGD)
Pulp & paper industry components such as black liquor heater tubes, digester blow valves, rotary feed valves, I.D.fans, brownstock washers, precipitators, bleaching components
Food Industry applications including sugar cane centrifuges, corn and vegetable processing plant
Agrochemicals production such as fertilizers (based on wet phosphoric acid)
Sewage treatment, seawater cooling, desalination plants
Material summary
Notes:
1.Testing shall be carried out in accordance with ASTM A370 or EN ISO 6892-1 (tensile), EN ISO 6506-1(hardness)
2. Minimum properties quoted (tested at room temperature in a longitudinal direction)
3. Testing performed on each melt of material per heat treatment batch
4. Hardness shall be in accordance with NACE MR 1075 with a maximum HRC of 2
5. ASTM G48A corrosion test (at 50°C) no pitting and < 3.0 g/m2 weight loss (ASTM
specification < 4.0 g/m2)
6. Ferrite content 35-55%
7. Microstructure certified free from grain boundary carbides, sigma, chi and laves phases
Excellent corrosion resistance in a wide variety of corrosive chemicals
Pitting Resistance Equivalent number (PREN) of >40
Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing
environments
Critical Pitting Temperature exceeding 50°C
High strength compared to austenitic and 22%Cr duplex stainless steels
Excellent ductility and impact strength at both ambient and sub-zero temperatures
High resistance to abrasion, erosion and cavitation erosion
Excellent resistance to stress corrosion cracking in chloride containing environments
Listed in NACE MR 0175 for sour service
ASME Approval for Pressure Vessel application
