Sanicro® 61 is a nickel-chromium alloy characterized by:
- Good strength at high temperatures
- Excellent resistance to high temperature corrosion, particularly in oxidizing conditions
The alloy is suitable for a wide range of applications where resistance to both heat and corrosion is a requirement.
Standards
- UNS: N06601
Product standards
- ASTM B167
- ASME SB167
Chemical composition (nominal)
| C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|
| 0.03 | 0.3 | 0.6 | ≤0.025 | ≤0.015 | 23 | 60 |
Others:
Al=1.3
Applications
Sanicro® 61 is a general-purpose, highly corrosion resistant alloy suitable for a wide range of high temperature applications such as:
- Muffle tubing
- Recuperators
- Superheaters
- Thermocouple protection tubes
Corrosion resistance
Sanicro® 61 has superior resistance to, in particular, oxidation at high temperatures up to 1200°C (2200°F). The grade also offers excellent resistance to oxide scaling under cyclic thermal conditions, largely owing to the addition of aluminium.
Forms of supply
Sanicro® 61 seamless nickel alloy tubing is supplied bright annealed in the outside diameter range 27.67-48.3 mm (0.75-1.5 in. nominal) and wall-thickness range 2.0-4.0 mm (0.079-0.160 in.).
Tolerances
| Size OD, mm |
Tolerances OD, mm |
Wall thickness % |
|---|---|---|
| 26.67-48.3 | +0.4/-0.8 | +/-10 |
Mechanical properties
At 20 oC (68 oF)
| Proof strength | Tensile strength | Elong. | ||
|---|---|---|---|---|
| Rp0.21) | Rm | A2" | ||
| MPa | ksi | MPa | ksi | % |
| ≥205 | ≥30 | 550-760 | 80-110 | ≥30 |
1 MPa = 1 N/mm2
1) Rp0.2 corresponds to 0.2% offset yield strength
Physical properties
Density, at 20 °C; 68°F : 8.1 g/cm3, 0.29 lb/in3
Thermal conductivity
| Temperature, °C | W/(m °C) | Temperature, °F | Btu/(ft h°F) |
|---|---|---|---|
| 20 | 11.2 | 68 | 6.5 |
| 100 | 12.7 | 200 | 7.3 |
| 200 | 14.3 | 400 | 8.3 |
| 300 | 16.0 | 600 | 9.4 |
| 400 | 17.7 | 800 | 10.5 |
| 500 | 19.5 | 1000 | 11.6 |
| 600 | 21.0 | 1200 | 12.8 |
| 700 | 22.8 | 1400 | 13.8 |
| 800 | 24.4 | 1600 | 14.8 |
| 900 | 26.1 | 1800 | 15.8 |
| 1000 | 27.8 | 2000 | 16.9 |
Specific heat capacity
| Temperature, °C | J/(kg °C) | Temperature, °F | Btu/(lb °F) |
|---|---|---|---|
| 20 | 448 | 68 | 0.11 |
| 100 | 469 | 200 | 0.11 |
| 200 | 498 | 400 | 0.12 |
| 300 | 523 | 600 | 0.13 |
| 400 | 548 | 800 | 0.13 |
| 500 | 578 | 1000 | 0.14 |
| 600 | 603 | 1200 | 0.15 |
| 700 | 632 | 1400 | 0.16 |
| 800 | 657 | 1600 | 0.16 |
| 900 | 686 | 1800 | 0.17 |
| 1000 | 712 | 2000 | 0.18 |
Thermal expansion, mean values in temperature ranges (x10-6)
| Temperature, °C | Per °C | Temperature, °F | Per °F |
|---|---|---|---|
| 30-100 | 13.8 | 86-200 | 7.6 |
| 30-200 | 14.4 | 86-400 | 8.0 |
| 30-300 | 14.6 | 86-600 | 8.1 |
| 30-400 | 14.8 | 86-800 | 8.3 |
| 30-500 | 15.2 | 86-1000 | 8.5 |
| 30-600 | 15.6 | 86-1200 | 8.9 |
| 30-700 | 16.1 | 86-1400 | 9.2 |
| 30-800 | 16.7 | 86-1600 | 9.5 |
| 30-900 | 17.2 | 86-1800 | 9.8 |
| 30-1000 | 17.8 | 86-2000 | 10.2 |
Resistivity
| Temperature, °C | µΩm | Temperature, °F | µΩin. |
|---|---|---|---|
| 20 | 1.18 | 68 | 46.5 |
| 100 | 1.19 | 200 | 46.9 |
| 200 | 1.21 | 400 | 47.6 |
| 300 | 1.22 | 600 | 48.1 |
| 400 | 1.23 | 800 | 48.5 |
| 500 | 1.24 | 1000 | 48.9 |
| 600 | 1.25 | 1200 | 49.2 |
| 700 | 1.25 | 1400 | 49.2 |
| 800 | 1.25 | 1600 | 49.3 |
| 900 | 1.26 | 1800 | 49.6 |
| 1000 | 1.26 | 2000 | 49.9 |
Modulus of elasticity (x103) (annealed condition)
| Temperature, °C | MPa | Temperature, °F | ksi |
|---|---|---|---|
| 20 | 207 | 68 | 30.0 |
| 100 | 202 | 200 | 29.4 |
| 200 | 197 | 400 | 28.5 |
| 300 | 191 | 600 | 27.6 |
| 400 | 185 | 800 | 26.6 |
| 500 | 178 | 1000 | 25.4 |
| 600 | 170 | 1200 | 24.1 |
| 700 | 161 | 1400 | 22.5 |
| 800 | 150 | 1600 | 20.5 |
| 900 | 138 | 1800 | 18.4 |
| 1000 | 125 | 2000 | 16.2 |
Welding
The weldability of Sanicro® 61 is good. Suitable methods of fusion welding are manual metal-arc welding (MMA/SMAW) and gas-shielded arc welding, with the TIG/GTAW method as first choice.
For Sanicro® 61, heat-input of <1.2 kJ/mm and interpass temperature of <100°C (210°F) are recommended. A string bead welding technique should be used.
Recommended filler metals
TIG/GTAW or MIG/GMAW welding
ISO 18274 S Ni 6601/AWS A5.14 ERNiCrFe-11
ISO 18274 S Ni 6617/AWS A5.14 ERNiCrCoMo-1 (e.g. Exaton Ni53)
MMA/SMAW welding
ISO 14172 E Ni 6117/AWS A5.11 ENiCrCoMo-1
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 Alleima materials.