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Super Alloy Inconel X750(tm) |
Related Metals: |
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Nicrofer 7016 TiNb(tm)
Pyromet Alloy X-750(tm)
Udimet X750(tm)
HAYNES(r) X-750 alloy
Nickelvac X-750(tm)
HAYNES(r) X-750 alloy(tm)
Pyromet X-750(tm)
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Specifications: |
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AISI 688
AMS 5542
AMS 5582
AMS 5583
AMS 5598
AMS 5667
AMS 5668
AMS 5669
AMS 5670
AMS 5671
AMS 5698
AMS 5699
AMS 5747
ASTM B637
DIN 2.4669
DIN 2.4699
GE B50TF1232
GE B50YP44
MIL N-24114
MIL N-7786
MIL S-23192
UNS N07750
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Chemistry Data |
Aluminum |
|
0.4 - 1 |
Carbon |
|
0.08 max |
Chromium |
|
14 - 17 |
Copper |
|
0.5 max |
Iron |
|
5 - 9 |
Manganese |
|
1 max |
Nickel |
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Balance |
Niobium |
|
0.7 - 1.2 |
Silicon |
|
0.5 max |
Sulphur |
|
0.01 min |
Titanium |
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2.25 - 2.75 |
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General Information |
Principal Design Features |
A nickel-chromium precipitation-hardening alloy suited for high strength at temperatures above 1300 F, with useful strength up to 1800 F. The alloy is also has excellent properties and ductility at cryogenic temperatures. |
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Applications |
Structural members in hot sections of gas turbines such as discs, thrust reversers and ducts. Heat treat fixtures and cryogenic vessels, springs and fasteners. |
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Machinability |
Conventional machining techniques used for iron based alloys may be used. This alloy does work-harden during machining and has higher strength and "gumminess" not typical of steels. Heavy duty machining equipment and tooling should be used to minimize c |
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Forming |
This alloy has good ductility and may be readily formed by all conventional methods. Because the alloy is stronger than regular steel it requires more powerful equipment to accomplish forming. Heavy-duty lubricants should be used during cold forming. I |
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Corrosion Resistance |
As is true for all of the high content nickel-chromium alloys the corrosion resistance of this alloy is good for both oxidizing and reducing environments found in many industrial applications. It is highly resistant to chloride stress-corrosion cracking. |
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Welding |
The commonly used welding methods work well with this alloy. Matching alloy filler metal should be used. If matching alloy is not available then the nearest alloy richer in the essential chemistry (Ni, Co, Cr, Mo) should be used. All weld beads should |
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Heat Treatment |
A variety of heat treatments are available for this alloy depending upon the end result properties that are to be optimized. All involve a solution anneal at temperatures in the 1625 F to 2100 F range and then a single or double precipitation-treating ti |
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Forging |
Forging may be readily accomplished in the temperature range of 2200 F to 1900 F. Light forging for finishing can be done in the 1900 F - 1800 F range, below 1800 F the alloy is very stiff and may crack. |
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Hot Working |
Hot working should be accomplished in the temperature range of 2200 F to 1800 F. The final hot reduction should be 20% at a temperature less than 2000 F, but above 1800 F in order to meet specification properties. |
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Cold Working |
Cold forming may be done using standard tooling although plain carbon tool steels are not recommended for forming as they tend to produce galling. Soft die materials (bronze, zinc alloys, etc.) minimize galling and produce good finishes, but die life is |
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Annealing |
Annealing from cold worked condition can be done at 1800 F to 2000 F followed by air cooling. This is to anneal the alloy only and not a final form heat treatment. |
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Aging |
See "Heat Treat". |
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Hardening |
See "Heat Treat". |
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Physical Data |
Density (lb / cu. in.) |
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0.298 |
Specific Gravity |
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8.25 |
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) |
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0.103 |
Electrical Resistivity (microhm-cm (at 68 Deg F)) |
|
731 |
Melting Point (Deg F) |
|
2575 |
Thermal Conductivity |
|
83 |
Mean Coeff Thermal Expansion |
|
7 |
Magnetic Permeability |
|
1 |
Modulus of Elasticity Tension |
|
31 |
Reduction of Area |
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42 |