Sanicro 72HP (Welding wire)
Datasheet updated 2012-08-17 14:55:55 (supersedes all previous editions)
Sanicro 72HP is filler material for joining NiCrFe alloys, 9% Ni steels used at cryogenic temperatures, stainless steels to carbon steels, high service temperature NiCu alloys to carbon steels and NiCu alloys to nickel alloys. Sanicro 72HP can be used in air up to 1175°C (2145°F) and in sulphur dioxide atmospheres up to 800°C (1470°F).
Sanicro 72HP is suitable for MIG, TIG, PAW and SAW and available as wire and rods.
Standards
- AWS ERNiCr-3
- EN number Ni 6082
Product standards
- EN ISO 18274
- ASME/AWS SFA5.14
Approvals
CE, TÜV.
Chemical composition - filler metal
| C | Si | Mn | P | S | Cr | Ni | Mo | Co | Cu | N | Ti | Nb | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| max | max | max | max | max | max | max | max | ||||||
| 0.03 | 0.1 | 3.0 | 0.010 | 0.010 | 20.0 | 72.5 | 0.2 | 0.10 | 0.05 | 0.05 | 0.4 | 2.6 | 1.0 |
Chemical composition - all-weld metal
The following data is typical for non heat treated all-weld metal made by MIG welding with argon shielding gas.
| C | Si | Mn | P | S | Cr | Ni | Ti | Fe | Nb |
|---|---|---|---|---|---|---|---|---|---|
| max | max | max | |||||||
| 0.03 | 0.1 | 3 | 0.010 | 0.010 | 20.5 | 72 | 0.2 | 0.5 | 2.5 |
Microstructure - all-weld metal
Fully austenitic
Mechanical properties- all-weld metal
|
Temperature
|
°C | 20 | 400 | 600 | 700 | 800 | -196 |
|---|---|---|---|---|---|---|---|
|
Yield strength, RP0.2
|
MPa | 390 | 240 | - | - | - | - |
|
Tensile strength, Rm
|
MPa | 660 | 540 | - | - | - | - |
|
Elongation, A
|
% | 45 | . | - | - | - | - |
|
Reduction in area, Z
|
% | 50 | - | - | - | - | - |
|
Impact strength, Charpy V
|
J | 245 | - | - | - | - | 150 |
|
Hardness, Vickers
|
HV | 180 | -- | - | - | - | - |
|
Creep rupture strength 5 x 105 h
|
MPa. |  |
- | 180 | 53 | 20 | - |
Physical properties - all-weld metal
|
Temperature, °C
|
20 | 100 | 300 | 500 | 700 |
|---|---|---|---|---|---|
|
Thermal conductivity, W/m
|
15 | 16 | 18 | 22 | 25.5 |
Thermal expansion per °C, from 20°C (68 oF) to 400°C (750 oF) 12 x 10-6
Density, g/cm3, at 20 oC (68 oF) 8.3
Corrosion resistance - all-weld metal
Sanicro 72HP has very good resistance to general corrosion, stress corrosion cracking, and due to its low carbon and high chromium contents, good resistance to intergranular corrosion.
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.
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 | 250-400 | 28-32 |
| 3.2 | 300-450 | 29-34 |
Recommended welding flux is Sandvik 50SW.
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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