Sanicro 68HP (Welding wire)
Datasheet updated 2012-08-02 19:07:32 (supersedes all previous editions)
Sanicro 68HP is a filler material for welding Sanicro 69, i.e. Alloy 690, and similar alloys. It produces corrosion resistant overlays on most low-alloy and stainless steels. Sanicro 68HP can also be used for dissimilar joints between the common nickel-base alloys and carbon, low-alloy and stainless steels. Sanicro 68HP is available as wire and rods.
Standards
- AWS ERNiCrFe-7
- EN number Ni 6052
Product standards
- EN ISO 18274
- ASME/AWS SFA5.14
Chemical composition - filler metal
| C | Si | Mn | P | S | Cr | Ni | Mo | Fe | Nb | Ti | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|
| max | max | max | max | max | |||||||
| 0.03 | 0.2 | 0.9 | 0.01 | 0.01 | 30 | 60 | 0.10 | 9 | 0.10 | 0.5 | 0.5 |
Chemical composition - all-weld metal
| C | Si | Mn | P | S | Cr | Ni | Mo | Fe | Nb | Ti | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|
| max | max | max | max | max | |||||||
| 0.03 | 0.1 | 0.9 | 0.01 | 0.01 | 29.5 | 58.5 | 0.10 | 9 | 0.10 | 0.5 | 0.5 |
Microstructure - all-weld metal
Fully austenitic.
Mechanical properties - all-weld metal
|
Temperature
|
°C | 20 | 360 | 400 |
|---|---|---|---|---|
|
Yield strength, RP0.2
|
MPa | 410 | 350 | 330 |
|
Tensile strength, Rm
|
MPa | 650 | 550 | 520 |
|
Elongation, A
|
% | 37 | 37 | 37 |
|
Reduction in area, Z
|
% | 43 | 48 | 48 |
|
Impact strength, Charpy V (KV)
|
J | 180 | - | - |
|
Impact strength, U-notch (KU)
|
J | 75 | - | - |
|
Temperature
|
°C | 20 | 360 |
|---|---|---|---|
|
Yield strength, RP0.2
|
MPa | 460 | 380 |
|
Tensile strength, Rm
|
MPa | 690 | 565 |
|
Elongation, A
|
% | 32 | 34 |
|
Reduction in area, Z
|
% | 38 | 40 |
1) Post Weld Heat Treatment
Physical properties - all-weld metal
| Temperature, °C | 20 | 100 | 300 | 500 |
|---|---|---|---|---|
| Thermal conductivity, W/m | 11 | 16 | 16 | 19 |
| Thermal expansion per °C, from 30°C to 400°C | 15 x 10-6 |
|---|---|
| Density, g/cm3, at 20 oC | 8.1 |
Corrosion resistance - all-weld metal
Sanicro 68HP shows very good resistance to stress corrosion cracking in nuclear pure water environments. The alloy has also good resistance to high temperature oxidation.
Recommended welding data
MIG/MAG welding
Electrode positive is used to give good penetration in all types of welded joints. 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 | ||||
| 0.8 | 5-9 | 50-140 | 16-25 | 15 |
| 1.0 | 5-9 | 70-160 | 16-25 | 15 |
| Spray-arc welding | ||||
| 1.0 | 6-12 | 150-230 | 22-27 | 18 |
| 1.2 | 5-9 | 170-280 | 23-28 | 18 |
| 1.6 | 3-5 | 230-370 | 24-30 | 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 thin 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.
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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