Description:

Osprey® 2507 super-duplex stainless steel is a highly alloyed duplex (austenitic-ferritic) stainless steel metal powder manufactured by inert gas atomization, capable of achieving high level of mechanical strength & corrosion resistance. This grade of metal powder is designed for processing by additive manufacturing including Powder Bed Fusion, for mainly oil and gas applications that demand high levels of performance e.g. impellers, propellers, connecting valves etc.

• Excellent corrosion resistance in chloride environments (PREN~ 43)

• Excellent mechanical properties

• High resistance to general corrosion

• Design flexibility due to additive manufacturing technology

 

Corrosion resistance

1. Corrosion resistance

The high chromium and molybdenum content of SAF 2507 makes it have strong resistance to organic acids such as formic acid and acetic acid. SAF 2507 alloy has strong resistance to inorganic acids, especially those containing chlorides. Anti-corrosion ability.

Compared with 904L, SAF2507 has stronger corrosion resistance to diluted sulfuric acid mixed with chloride ions.904L is an austenitic alloy, which is dedicated to resist the corrosion of pure sulfuric acid.

316L grade cannot be used in hydrochloric acid environment, it may suffer local corrosion or overall corrosion. SAF2507 can be used in diluted hydrochloric acid environment, with strong resistance to spot damage and crevice corrosion.

2. Intergranular corrosion

The lower carbon content of SAF 2507 greatly reduces the risk of carbide precipitation in the intergranular during heat treatment.Therefore, this alloy has a strong resistance to intergranular corrosion related to carbides.

3. Stress corrosion cracking

The duplex structure of SAF 2507 gives it strong resistance to stress corrosion cracking. Due to its higher alloy content, the corrosion resistance and strength of SAF 2507 are better than 2205.

 

Application field：

•Oil and gas industry

• Pulp and paper industry

• Chemical industry

• Refineries and petrochemical plants

• On-shore and off-shore industry

 

 

POWDER MORPHOLOGY

 

SEM micrographs of SAF 2507 a) -53 +15 µm powder with a spherical morphology, b) smooth surface and low level of

 

powder satellites and c) micrograph of powder in cross-section, in back scatted electron mode, highlighting the fine cellular structure.

 

Note: If the alloy powder has moisture absorption, or the storage period exceeds 3 months, it should be used before

 

Carry out drying treatment (150℃, heat preservation for 2 hours)