EOS StainlessSteel SuperDuplex

Material Data Sheet

EOS StainlessSteel SuperDuplex is an austenitic-ferritic duplex stainless steel for extreme conditions. The high chromium, molybdenum and nitrogen alloying give excellent corrosion resistance in many difficult environments. The product is optimized for additive manufacturing while maintaining SuperDuplex properties. The optimization of phase balance enables use of the product in as manufactured condition in many use cases. The general pitting resistance equivalent PREN for EOS SuperDuplex is 41 (PREN = %Cr + 3.3 X %Mo + 16 X %N)

MAIN CHARACTERISTICS

Excellent resistance to uniform, pitting and crevice corrosion
High strength together with high corrosion resistance

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TYPICAL APPLICATIONS

Oil and gas industry
Pulp and paper manufacturing devices
Mining and off-shore equipment

The EOS Quality Triangle

EOS uses an approach that is unique in the AM industry, taking each of the three central technical elements of the production process into account: the system, the material and the process. The data resulting from each combination is assigned a Technology Readiness Level (TRL) which makes the expected performance and production capability of the solution transparent.

EOS incorporates these TRLs into the following two categories:

Premium products (TRL 7-9): offer highly validated data, proven capability and reproducible part properties.
Core products (TRL 3 and 5): enable early customer access to newest technology still under development and are therefore less mature with less data.

All of the data stated in this material data sheet is produced according to EOS Quality Management System and international standards

POWDER PROPERTIES

Powder Chemical Composition (wt.-%)

Element	Min.	Max.
Fe	Balance
Cr	22	26
Ni	9	13
Mo	3	6
N	0.15	0.35
C	-	0.03

Powder Particle Size

GENERIC PARTICLE SIZE DISTRIBUTION	20 - 65 μm

SEM micrograph of EOS StainlessSteel SuperDuplex powder

HEAT TREATMENT

Description

Heat treatment optional.

Steps

Solution annealing:

Hold temperature 1100 °C, hold time 0.5 h when thoroughly heated, water quenching

Typical dimensional change after heat treatment -0.4 % (40 µm) or -0.8 % (80 µm)

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