Sandvik 27.9.5.L (Welding wire)
Datasheet updated 2012-08-17 14:55:10 (supersedes all previous editions)
Sandvik 27.9.5.L is a filler material for welding of hyper-duplex (ferritic-austenitic) stainless steels of UNS S32707 and 33207 type (e.g. Sandvik SAF 2707 HD and SAF 3207 HD). Sandvik 27.9.5.L is vailable as wire and rods.
Standards
- EN number Z 27 9 5 N L
Product standard
EN ISO 14334
Chemical composition- filler metal
Chemical composition, wt%
| C max |
Si | Mn | P max |
S max |
Cr | Ni | Mo | Co | N |
|---|---|---|---|---|---|---|---|---|---|
| 0.02 | 0.4 | 0.8 | 0.020 | 0.015 | 27 | 9 | 5 | 1 | 0.32 |
Chemical composition - all-weld metal
The following data is typical for non heat treated all-weld metal made by TIG welding with argon + 2% nitrogen shielding gas.
| C | Si | Mn | P | S | Cr | Ni | Mo | Co | N |
|---|---|---|---|---|---|---|---|---|---|
| max | max | max | |||||||
| 0.02 | 0.3 | 0.6 | 0.020 | 0.015 | 27 | 9 | 4.6 | 1 | 0.27 |
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 | Co | N |
|---|---|---|---|---|---|---|---|---|---|
| max | max | max | |||||||
| 0.02 | 0.6 | 0.6 | 0.020 | 0.015 | 27 | 9 | 4.5 | 1 | 0.26 |
Microstructure - all-weld metal
Austenitic-ferritic (duplex) microstructure with approximately 50 FN calculated from the WRC-92 diagram.
Mechanical properties - all-weld metal
|
Temperature
|
°C
|
20
|
-46
|
|---|---|---|---|
|
Yield strength, RP0.2
|
MPa
|
790
|
-
|
|
Tensile strength, Rm
|
MPa
|
920
|
-
|
|
Elongation, A
|
%
|
25
|
-
|
|
Impact strength, Charpy V
|
J
|
110
|
95
|
|
Temperature
|
°C
|
20
|
-40
|
|---|---|---|---|
|
Yield strength, RP0.2
|
MPa
|
710
|
-
|
|
Tensile strength, Rm
|
MPa
|
900
|
-
|
|
Elongation, A
|
%
|
25
|
-
|
|
Impact strength, Charpy V
|
J
|
65
|
40
|
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 properties - all-weld metal
Sandvik 27.9.5.L has a high resistance to intergranular corrosion and pitting. Nominal CPT in the ASTM G48 test is 50°C. The filler also has good resistance to stress corrosion cracking, especially in environments containing H2S or chlorides.
Recommended welding data
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+2%N2 should be used to prevent oxidation and to maintain Nitrogen in the weld metal.
Submerged-arc welding
Electrode positive is suggested for joint welding to give good penetration.
| Wire diameter, mm |
Current, A
|
Voltage, V
|
|---|---|---|
| 2.0 |
200-300
|
28-32
|
| 2.4 |
250-450
|
28-32
|
| 3.2 |
300-500
|
29-34
|
Recommended welding 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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