ALLOY 725/ INCONEL 725

  • N07725

ALLOY 725 / INCONEL 725

Alloy 725 / Inconel 725 is a nickel chromium-molybdenum-niobium alloy that is highly resistant to corrosion and is age hardenable for extremely high strength. It has essentially the same corrosion resistance as INCONEL alloy 625, which is widely used in a broad range of severely corrosive environments. The strength of age-hardened Alloy 725 is of the order of twice that of annealed alloy 625.

Key properties

(in annealed condition)
Tensile strength: 113.60–183.90
Tensile strength 783.00–1268.00
Yield strength: 48.40–133.60
Yield strength: 334.00–921.00
Elongation: 27.00–60.00%
Hardness: 5.00–39.00

Ni

55.00-59.00%

Cr

19.00-22.50%

Mo

7.00-9.50%

Nb

2.75-4.00%

Ti

1.00-1.70%

Al

0.00-0.35%

C

0.00-0.03%

Mn

0.00-0.35%

Si

0.00-0.20%

P

0.00-0.02%

S

0.00-0.01%

Fe

Balance

INVENTORY

Product form Size range from Size range to
Alloy 725 pipe 0.5 in 8 in
Alloy 725 tube 12 mm 260 mm
Alloy 725 pipe fittings 0.5 in 8 in
Alloy 725 flanges 0.5 in 8 in
DOWNLOAD DATASHEET

APPLICATIONS

gas-turbine

Alloy 725 can be used in a variety of applications

  • Tubing hangers
  • Landing nipples
  • Side pocket mandrels
  • Polished bore receptacles
  • High strength fasteners

ABOUT ALLOY 725 / INCONEL 725

The strength of age-hardened Alloy 725 is of the order of twice that of annealed alloy 625. Because the strength of Inconel 725 is developed by heat treatment, not by cold work, ductility and toughness remain high.

Also, strength can be imparted to large or non-uniform sections that cannot be strengthened by cold work.

To learn more about our stock of Alloy 725 pipe and tube contact us, or fill in our online quote request form and one of our team will get back to you.

Properties of Alloy 725

DENSITY    8.31 g/cm³ | 0.300 lb/in³
MELTING POINT 1271-1343°C | 2320-2449°F

ALLOY 725 MECHANICAL PHYSICAL PROPERTIES

Property 21.1°C 93.3°C 148.9°C 204.4°C 315.6°C 371.1°C 426.7°C 537.8°C 648.9°C 982°C
Ultimate Tensile Strength /Mpa * 1254 1230 1189 1170 1099 1096 1106 1058 - -
0.2% Yield Strength /Mpa * 892 868 826 824 782 798 818 778 - -
Reduction of area % * 48.4 47 50.2 52.4 54.2 53.4 49.6 47.7 - -
Elongation % * 32 29.6 30.9 30.7 32.4 30.8 29.6 31 - -
Coefficient of Thermal Expansion /µm/m°C - 13 - 13.1 13.4 13.7 - 14.1 14.4 -
Thermal Conductivity /kcal/(hr.m.°C) 9.143 10.082 10.89 11.709 13.235 14.058 14.864 16.22 18.24 21.57
Modulus of Elasticity / GPa 204 200 - 194 188 182 - 177 169 -

Alloy 725 Specifications

UNS Number N07725
WNR Number  
Standards ASTM B805, NACE MR0715

Welding Consumables

WELDING ELECTRODES -
FILLERS INCO-WELD® Filler Metal 725NDUR®
Download the Alloy725 data sheet

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