Sanicro® 61 Tube and pipe, seamless

Datasheet updated

2022-05-10 07:46
(supersedes all previous editions)

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)

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

Chemical composition (nominal) %

CSiMnPSCrNiCuOthers
0.03 0.3 0.6 ≤0.025 ≤0.015 23 60 ≤1.0 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 strengthTensile strengthElong.
Rp0.21) Rm A2"
MPaksiMPaksi%
≥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, °CW/(m °C)Temperature, °FBtu/(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, °CJ/(kg °C)Temperature, °FBtu/(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, °CPer °CTemperature, °FPer °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, °CµΩmTemperature, °FµΩin.
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, °CMPaTemperature, °Fksi
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.