Sandvik 25.10.4.L (Welding wire)
Datasheet updated 2012-08-02 19:15:37 (supersedes all previous editions)
Sandvik 25.10.4.L welding wire has been specially developed for welding Sandvik SAF 2507 and other super-duplex steels. The grade is characterized by excellent resistance to stress corrosion in chloride-bearing environments and excellent resistance to pitting and crevice corrosion.
Sandvik 25.10.4.L can also be used for welding Sandvik SAF 2205 and corresponding duplex steels when the highest possible corrosion resistance is required.
Standards
- AWS ER2594
- EN number 25 9 4 N L
Product standards
- EN ISO 14343
- ASME/AWS SFA5.9
Approvals
CE, DNV, TÜV
Chemical composition - filler metal
| C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| max | max | max | ||||||
| 0.020 | 0.3 | 0.4 | 0.020 | 0.015 | 25 | 9.5 | 4 | 0.24 |
Chemical composition - all-weld metal
The following data is typical for non heat treated all-weld metal made by MIG or TIG welding with argon shielding gas.
| C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| max | max | max | ||||||
| 0.020 | 0.3 | 0.4 | 0.020 | 0.015 | 25 | 9.5 | 4 | 0.21 |
The following data is typical for non heat treated weld metal made by SAW and flux 15W.
| C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|
| max | max | max | ||||||
| 0.020 | 0.6 | 0.3 | 0.020 | 0.015 | 24.5 | 9.6 | 4 | 0.21 |
Microstructure - all-weld metal
Austenitic-ferritic (duplex) microstructure with approximately 40 FN calculated from the WRC-92 diagram.
Mechanical properties - all-weld metal)
|
Temperature
|
°C
|
20
|
-40
|
|---|---|---|---|
|
Yield strength, RP0.2
|
MPa
|
650
|
-
|
|
Tensile strength, Rm
|
MPa
|
850
|
-
|
|
Elongation, A
|
%
|
25
|
-
|
|
Impact strength, Charpy V
|
J
|
135
|
110
|
|
Temperature
|
°C
|
20
|
-40
|
|---|---|---|---|
|
Yield strength, RP0.2
|
MPa
|
690
|
-
|
|
Tensile strength, Rm
|
MPa
|
880
|
-
|
|
Elongation, A
|
%
|
25
|
-
|
|
Impact strength, Charpy V
|
J
|
90
|
60
|
Physical properties - all-weld metal
| Thermal conductivity, W/m °C, at 20 oC | 16 |
|---|---|
| Thermal expansion per °C, from 20° to 400°C | 14.5x10-6 |
| Density, g/cm3, at 20 oC | 7.9 |
Corrosion resistance - all-weld metal
Sandvik 25.10.4.L has a high resistance to intergranular corrosion and pitting. Nominal CPT in the ASTM G48 test is 40°C (105 oF). The filler also has good resistance to stress corrosion cracking, especially in environments containing H2S or chlorides.
Recommended welding data
MIG welding
Electrode positive is used to give good penetration in all types of welded joint. The following table shows common conditions for MIG welding.
| Wire diameter | Wire feed | Current | Voltage | Gas |
|---|---|---|---|---|
| mm | m/min | A | V | l/min |
| Short-arc welding | ||||
| 0.8 | 4-8 | 40-120 | 15-19 | 12 |
| 1.0 | 4-8 | 60-140 | 15-21 | 12 |
| Spray-arc welding | ||||
| 1.0 | 6-12 | 140-220 | 23-28 | 18 |
| 1.2 | 5-9 | 180-260 | 24-29 | 18 |
| 1.6 | 3-5 | 230-350 | 25-30 | 18 |
| Pulsed-arc welding1) | ||||
| 1.2 | 3-10 | 150-250 | 23-31 | 18 |
1)Pulse parameters: Peak current 300 - 400 A
Background current 50 - 150 A
Frequency 80 - 120 Hz
Sandvik can provide recommendations for shielding gases.
Short-arc welding is used with light gauge material of less than about 3 mm, in depositing root runs, and in welding out-of-flat positions.
The higher the inductance in short-arc welding, the higher the fluidity of the molten pool.
Spray-arc welding is normally used for heavier gauge material.
TIG welding
The parameters for TIG welding depend largely upon the base metal thickness and the welding application.
Electrode negative and a shielding gas of argon or helium should be used to prevent oxidation of the weld metal.
Submerged-arc welding
Electrode positive is suggested for joint welding to give good penetration.
| Wire diameter | Current | Voltage |
|---|---|---|
| mm | A | V |
| 2.0 | 200-300 | 28-32 |
| 2.4 | 250-450 | 28-32 |
| 3.2 | 300-500 | 29-34 |
Recommended flux is Sandvik 15W.
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.
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