Sandvik 18.LNb (Welding wire)
Datasheet updated 2012-08-02 19:35:40 (supersedes all previous editions)
Sandvik 18.LNb is a filler material suitable for joining Cr-steels with max 18% Cr, stabilized or non-stabilized. It is available as wire and rods for MIG/MAG, TIG and plasma-arc welding.
Standards
- EN number 18 L Nb
Product standards
EN ISO 14343
Filler metal
| C | Si | Mn | P | S | Cr | Nb |
|---|---|---|---|---|---|---|
| <0.030 | 0.7 | 0,5 | <0.025 | <0.015 | 18.5 | 0,5 |
Chemical composition- all-weld metal
The following data are typical for none heat treated all weld metal made by the MIG/MAG process using Argon + 2% O2 as shielding gas.
| C | Si | Mn | P | S | Cr | Nb |
|---|---|---|---|---|---|---|
| 0.02 | 0.6 | 0.3 | <0.030 | <0.015 | 18.1 | 0.5 |
Microstructure- all-weld metal
Ferritic
Corrosion resistance
Matches the corrosion resistance of 17Cr (AISI 430-type) base metals.
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, mm |
Wire feed, m/min
|
Current, A
|
Voltage, V
|
Gas, l/min
|
|---|---|---|---|---|
| Short-arc welding |  |
|
|
|
| 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
|
| Pulsed-arc welding1) | |
|
|
|
| 1.2 |
3-10
|
150-250
|
23-31
|
18
|
| 1)Pulse parameters: | Peak current Background current Frequency |
300 - 400 A 50 - 150 A 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.
Applications
Mainly used for welding of exhaust systems in the automotive industry
Continuous development may necessitate changes in technical data without notice.
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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