Page 4 - SD 2304

UR35N duplex exhibits improved
MACHINABILITY
SD 2304 machinability properties particularly when
considering drilling. Its behaviour is
(*)
equivalent to that of MACH 18.10.2
(316L grade with small sulphur additions
and special melting process to control the
shape and composition of inclusions).
Furthermore SD 2304 has better
corrosion resistance and cleanliness
properties as no sulphur additions are
necessary. Localised corrosion resistance

behavour is improved.
(*) CLI - MACH 18.10.2 is a 316L type grade with
Total length (drilling) versus drilling speed
improved machinability properties

WELDING  SD 2304 can be successfully welded by the following processes :
 TIG, manual and automatic  PLASMA, MIG, SMAW, SAW, FCAW...

 The duplex microstructure renders the alloy less sensitive to hot cracking.
 The welding parameters must be optimized to obtain a controlled ferrite level
(20-70%). Typical recommended heat inputs are 10-25 KJ/cm with a 150°C
(302°F) max interpass temperature. These conditions must be optimized taking
into account the thickness of the products and welding equipments (Consult if
necessary). We do not recommend pre or post-welding heat treatments. Only
complete solution annealing heat treatment may be considered (please, contact

us).

APPLICATIONS  Generally where 304 and 316L are used
 Pulp and paper industry (chip storage tank, white and black liquor tanks...)
 Caustic solutions, organic acids (SCC resistance)
 Food industry
 Safety panels (high mechanical properties)
 Pressure vessels (weight savings...)
 Mining (abrasion/corrosion).

SIZE RANGE Hot rolled plates Cold rolled plates Clad plates
5 to 150 mm 2 to 14 mm 6 to 150 mm
Thickness 3/16" to 6" 5/64" to 5/8" 1/4" to 6"
Up to 3300 mm Up to 2300 mm Up to 3300 mm
Width Up to 130" Up to 90.5" Up to 130"
Up to 12000 mm Up to 8250 mm Up to 14000 mm
Length Up to 472" Up to 325" Up to 551"
Other sizes are available on request, including 4100mm (161,4") width plates

NOTE
This technical data and information represents our best knowledge at the time of printing. However, it may
be subject to some slight variations due to our ongoing research programme on corrosion resistant grades.
We therefore suggest that information be verified at time of enquiry or order.
Furthermore, in service, real conditions are specific for each application. The data presented here is only for
the purpose of description, and may only be considered as guarantees when our company has given written
formal approval.Further information may be obtained from the following address.