The short introduction of Inconel X-750/UNS N07750/2.4669

Inconel X-750/2.4669 is a nickel-chromium-iron alloy, which is age-strengthened with γ"[Ni3(Al, Ti, Nb)] phase. It has good corrosion resistance and oxidation resistance below 980 °C, and has a high temperature below 800 °C. The strength of Inconel X-750/2.4669, below 540 °C has good resistance to slack. Inconel X-750 also has good formability and welding performance. Inconel X-750 is mainly used in the manufacture of aircraft engines below 800 °C and requires high strength resistant flat springs and coil springs. Inconel X-750 can also be used to make parts such as turbine turbine blades. Inconel X-750 materials are available in sheets, strips, bars, forgings, rings, wires and tubes.


The chemical composition of InconelX-750

C

%

Cr

%

Ni+Co

%

Al

%

Ti

%

Fe

%

Nb+Ta

%

≤0.08

14.0-17.0

≥70.0

0.40-1.00

2.25-2.75

5.00-9.00

0.70-1.20


Co

%

Mn

%

Si

%

S

%

Cu

%

P

%

≤1.00

≤1.00

≤0.50

≤0.010

≤0.50

≤0.015


The mechanical properties 20°C of InconelX-750

0.2% Yield   strength

Rp

≥N/mm2

Tensile strength Rm

N/mm2

Elongation A5

≥%

Modulus of  elasticity

kN/mm2

630

≥980

8

214


The heat treatment process of InconelX-750 

Inconel X-750 plate, belt, pipe supply state of the solution heat treatment system 980 °C ± 15 °C, air cooling. For the intermediate heat treatment system of materials and parts, the following processes can be selected for heat treatment.

Annealing: 955~1010 °C, water-cooled.

Annealing of welded parts before welding: 980 ° C, 1 h.

Stress relief annealing of welded parts: 900 ° C, moisturizing for 2 h.

Stress relief annealing: 885 ° C ± 15 ° C, 24 h, air cooling.


The specifications and supply status of InconelX-750

1. InconelX-750 materials are available in a wide range of bars, forgings, rings, hot rolled sheets, cold rolled sheets, strips, tubes and wires.

2. Inconel X-750 sheets and strips are generally supplied after hot or cold rolling, annealing or solid solution, pickling and polishing.

3. InconelX-750 bar, forgings and ring parts can be supplied in forged or hot rolled condition; or can be solution treated after forging; bar can be polished after solid solution or car light supply, when order is required At the time, it can be placed in the cold pull state.

4. InconelX-750 wire can be supplied in solid solution; for wire with nominal diameter or thickness below 6.35mm, it can be solid solution and supplied with 50%~65% cold tensile deformation; nominal diameter or edge Wire material longer than 6.35mm. After solution treatment, it is supplied with a cold tensile deformation of not less than 30%. For wire materials with a nominal diameter or side length of not more than 0.65 mm, it is supplied at a cold drawing deformation of not less than 15% after solution treatment according to the requirements.


The melting and casting process of InconelX-750

The alloy adopts electric arc furnace plus vacuum self-consumption remelting, vacuum induction charging slag, electroslag plus vacuum self-consumption remelting or vacuum induction plus vacuum self-consumption remelting.

InconelX-750 application overview and special requirements

The alloy is mainly used for the manufacture of corrosion-resistant planar wave springs, circumferential coil springs, helical compression springs, spring rings and seals for aero-engine operating temperatures below 540 °C.


Products show and scope

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