sandvik 25.10.4.lr covered electrodes

SANDVIK 25.10.4.LR
COVERED ELECTRODES
DATASHEET
Sandvik 25.10.4.LR (2594-16) is a covered electrode with rutile-basic coating and about 105% metal recovery
used for welding of super-duplex (austenitic-ferritic) stainless steels of UNS S32750/S32760 type (e.g. Sandvik
SAF 2507 and Zeron* 100).
The weld metal has especially good properties under severely corrosive conditions. Examples of properties are:
–
Excellent stress corrosion cracking resistance in chloride-containing media
–
Excellent pitting resistance
–
High resistance to general corrosion
–
High resistance to erosion corrosion and corrosion fatigue
Spray transfer gives a bead with a finely rippled surface. There is little spatter and very good slag removal. The
electrode has excellent arc stability and fast burn off rate with minimal stub loss. It is also characterized by
improved moisture resistance, self-peeling slag, high resistance to porosity and easy post weld finishing.
* Zeron is a trademark owned by Rolled Alloys
–
ISO 3581: 25 9 4 N L R
–
AWS A5.4/ASME SFA-5.4: E2594-16
–
Product Approvals
–
CWB
DNV
–
TÜV
Contact your nearest sales office for full details.
CHEMICAL COMPOSITION (NOMINAL) %
Chemical composition (nominal) %
C
Si
Mn
Cr
Ni
Mo
N
0.03
0.5
0.7
25
9.5
4
0.25
APPLICATIONS
For welding:
–
High alloy austenitic-ferritic stainless steels such as Sandvik SAF 2507, UNS S32750 (wrought) and UNS
J93404 (cast) and other super-duplex steels
1
SANDVIK 25.10.4.LR
Folha de dados atualizada 02/08/2016 13:27:06 (substitui todas as edições anteriores)
STANDARDS
–
25% chromium duplex stainless steels with PRE values between 37 and 40
–
Dissimiliar joints between duplex and carbon and low-alloy steels
–
Sandvik SAF 2205 and corresponding duplex steels where the highest corrosion resistance is required
FORMS OF SUPPLY
Diameter, mm
Length, mm
Diameter, in.
Length, in.
2.50
300
~3/32
~12
3.25
350
~1/8
~14
4.00
350
~5/32
~14
The electrodes are delivered in hermetically sealed metal cans.
WELD METAL CHARACTERISTICS
The all-weld metal for Sandvik 25.10.4.LR (2594-16) is austenitic-ferritic (duplex) with a ferrite content of
approximately 40 FN according to WRC-92.
MECHANICAL PROPERTIES
Temperature
°C (°F)
20 (68)
Yield strength, RP0.2
MPa (ksi)
640 (93)
Tensile strength, Rm
MPa (ksi)
840 (122)
Elongation, A
%
25
Hardness
HV10
298
Impact strength (KV)
J (ft lb)
50 (37)
-40 (-40)
35 (26)
CORROSION RESISTANCE
FABRICATION
Welding data
Welding
positions
Diameter <2.50 mm (~3/32 in.)
All except vertical down
Diameter >3.25 mm (~1/8 in.)
All except vertical down and overhead
Current/polarity
Direct current/electrode positive or alternating current at an open circuit voltage of at least
60V
Diameter, mm
(in.)
Current, A
2.50 (~3/32)
55-85
3.25 (~1/8)
70-110
4.00 (~5/32)
110-150
Redrying electrodes when necessary: 300°C (570oF)/2h
Thermal data
Interpass temperature: 150°C (300°F). A lower interpass temperature may be recommended when welding
heavy structures.
2
SANDVIK 25.10.4.LR
Folha de dados atualizada 02/08/2016 13:27:06 (substitui todas as edições anteriores)
The minimum CPT value (Critical Pitting Temperature) in 6% ferric chloride solution is 40°C (105°F).
Heat input: 0,2 kJ/mm - 1,5 kJ/mm (5-38 kJ/in.)
PRODUCTIVITY DATA
Electrode diameter mm (in.)
2.50 (~3/32)
3.25 (~1/8)
4.00 (~5/32)
Length, mm
(in.)
300
(~12)
350
(~14)
350
(~14)
kg weld metal/h (approx.)
1
1.5
2.0
lb weld metal/h (approx.)
2.2
3.3
4.4
kg weld metal/kg electrodes
0.62
0.64
0.65
lb weld metal/lb electrodes
0.62
0.64
0.65
Electrodes/kg weld metal
91
45
31
Electrodes/ lb weld metal
41
21
14
33
45
55
18 (39)
35 (77)
53 (117)
Deposition rate
Effective value
Change value
Burn-off time per electrode at max current, s
Weight/1000 pcs, kg (lb)
Folha de dados atualizada 02/08/2016 13:27:06 (substitui todas as edições anteriores)
Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed
only when we know the actual service conditions. Continuous development may necessitate changes in technical data without
notice. This datasheet is only valid for Sandvik materials.
www.smt.sandvik.com/contact-us
SMT.SANDVIK.COM