A: Grade and production size range
2507 / S32750 / X2CrNiMoN25-7-4/ 2328/ 1.4410
OD Φ6mm~Φ860mm，Thickness 1mm~60mm
1. An austenitic-ferritic super duplex stainless steel with nitrogen.
2. High resistance to stress corrosion cracking in environments containing hydrogen sulfide or chloride-bearing environments
3. Excellent resistance to spot corrosion, gap corrosion and uniform corrosion, high resistance to erosion corrosion and corrosion fatigue
4. Good weldability, good hot-working properties because of good physical properties and very high mechanical strength
5. Application for mechanical and structural components that require both high strength and high corrosion resistance and burning (waste) gas purification equipment.
C≤0.03 Si≤0.8 Mn≤1.2 P≤0.035 S≤0.002 NI 6.0-8.0
Cr 24-26 Mo 3.0-3.5 N 0.24-0.32 Cu≤0.5 Fe balance
Tensile strength(Rm Mpa) ≥800
Yield strength(RP0.2 Mpa) ≥550
Elongation(％) ≥25
Hardness(HRC) ≤32
ASTM A789/ASME SA789 ASTM A790/ASME SA790 EN 10216-5, NFA 49-217
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Oil and gas exploration |
Chloride-containing environments such as seawater handling and process systems. Hydraulic and process fluid tubes in umbilicals |
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Seawater cooling |
Tubing for heat exchangers in refineries, chemical industries, process industries and other industries using seawater or chlorinated seawater as coolant |
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Salt evaporation |
Evaporator tubing for production of corrosive salts, e.g. chlorides, sulfates and carbonates |
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Desalination plants |
Pressure vessels for reverse osmosis units, tube and pipe for seawater transport, heat exchanger tubing |
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Geothermal wells |
Heat exchangers in geothermal exploitation units, systems exposed to geothermal or high salinity brines, tubing and casing for production |
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Oil refining and petrochemical and gas processing |
Tubes and pipes where the process environment contains a high amount of chlorides, or is contaminated with hydrochloric acid |
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Pulp and paper production |
Material for chloride-containing bleaching environments |
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Chemical processing |
Organic acid plants, also when process solutions are contaminated with e.g. chlorides |
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Mechanical components requiring high strength |
Propeller shafts and other products subjected to high mechanical load in seawater and other chloride-containing environments |
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Desulfurization units |
As reheater tubes in flue gas desulfurization systems. The good mechanical and corrosion properties make SAF™ 2507 an economical choice in many applications by reducing the life cycle cost of equipment. |
1, the PRE number (Pitting Resistance Equivalent) and The PRE is defined as, in weight-% PRE = %Cr + 3.3 x %Mo + 16 x %N
The minimum PRE-value is 41.
2, Solution annealing: Slow heating up to 1000°C (1830°F). Annealing at 1050-1125°C (1920-2060°F), followed by quenching.