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Product Details:
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| Material: | UNS N07750, A Precipitation-hardenable Nickel-chromium Alloy | ||
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| High Light: | high end special alloys,high performance alloys,UNS N07750 forgings for aerospace |
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Alloy X-750, UNS N07750 forging, bar, plate, tube, bolts etc, high-end specialty alloys R&D and manufacturer
PRODUCT
Alloy X-750, UNS N07750 forgings, bars, plates, tubes, springs, bolts etc for aerospace etc.
EQUIVALENT DESIGNATIONS
GH4145, Inconel® X-750, NiCr17Fe7TiAl(EN), Haynes® X-750 alloy, VDM® Alloy X-750, (Nicrofer 7016 TiNb), W.Nr.2.4669(DIN), NiCr15Fe7TiAl(DIN), NiCr15Fe7Ti2Al(ISO), NC15TNbA(AFNOR)
PRODUCT FORMS
Available product are sheet, strip, plate, round bar, flat bar, forging, forging stock, hexagon, wire, tubing, extruded section, springs and fasteners, etc.
It can be delivered in the solution treated or precipitation hardened condition.
APPLICATION
The economics of alloy X-750 coupled with its availability in all standard mill forms has resulted in applications in a wide variety of industrial fields. In gas turbines, it is used for rotor blades and wheels, bolts, and other structural members. Alloy X-750 is used extensively in rocket-engine thrust chambers. Airframe applications include thrust reversers and hot-air ducting systems. Large pressure vessels are formed from alloy X-750.
Other applications are heat-treating fixtures, forming tools, extrusion dies, and test machine grips. For springs and fasteners, alloy X-750 is used from sub-zero to 1200°F.
CHEMICAL COMPOSITION
| Fe | Ni+Co | Co | Cr | Ti | Cu |
| 5.0-9.0 | ≥70.0 | ≤1.00 | 14.0-17.0 | 2.25-2.75 | ≤0.50 |
| C | Al | Mn | Si | S | Nb+Ta |
| ≤0.08 | 0.40-1.00 | ≤1.00 | ≤0.50 | ≤0.010 | 0.70-1.20 |
OVERVIEW
Alloy X-750 is a precipitation-hardenable nickel-chromium alloy used for its corrosion and oxidation resistance and high strength at temperatures to 1300°F. Although much of the effect of precipitation hardening is lost with increasing temperature over 1300°F, heat-treated material has useful strength up to 1800°F. Alloy X-750 also has excellent properties down to cryogenic temperatures.
Alloy X-750 Characterized by:
● high tensile strength up to 705°C (1300°F)
● high creep and rupture strength up to 820 °C (1500 °F)
● high oxidation resistance up to 980 °C (1800 °F)
● excellent mechanical properties in cryogenic environments
● good corrosion resistance at high and low temperatures and high resistance to stress corrosion cracking
● good weldability by resistance and fusion processes
PHYSICAL PROPERTIES
Density: 8.28 g/cm3
Melting Range: 1395-1430°C
HEAT TREATMENT
Applicable heat treatments for Alloy X-750 product forms
| Product form | AMS Spec. | Heat Treatment | Remarks |
|
Rods Bars forgings |
5670 5671 5747 |
1800°F anneal + 1350°F/8 hr, FC to 1150°F, Hold at 1150°F for total precipitation-treating time of 18 hr, AC (Solution treatment plus furnace-cool precipitation treatment). | Increased tensile properties and reduced heat treating time for service up to about 1100°F. |
|
Sheet Strip plate (annealed) |
5598 | 1350°F/8 hr, FC to 1150°F, Hold at 1150°F for total precipitation-treating time of 18 hr, AC (Furnace-cool precipitation treatment). | High strength up to 1300°F (Increased tensile properties to about 1100°F). |
| Seamless tube | 5582 | 1300°F/20 hr, AC (Constant-temperature precipitation treatment). | High strength up to about 1300°F. |
|
Wire No. 1 temper |
5698 | 1350°F/16 hr, AC (Constant-temperature precipitation treatment). | For springs requiring optimum resistance to relaxation from about 700°F to 850°F and at low to moderate stresses to about 1000°F. |
MECHANICAL PROPERTIES
Rods, bars and forgings
Intermediate temperature Service (below 1100°F) – equalized plus precipitation treated material
For applications requiring high strength and ductility at service temperatures up to 1100°F, INCONEL alloy X-750 rod, bar, and forgings are given the following heat treatment:
1625°F/24 hr, A.C. – Equalizing
1300°F/20 hr, A.C. – Precipitation Heat Treatment
This heat treatment is described by AMS 5667, which requires that material so heat-treated have the following minimum room-temperature properties. Hardness will lie in the range of 302-363 BHN.
| Size | Tensile strength | Yield strength | Elongation in 4D | Reduction of Area |
| In. | ksi | (0.2% offset), ksi | % | % |
| Under 4.0 | 165 | 105 | 20 | 25 |
| 4.0 and over | 160 | 100 | 15 | 17 |
CORROSION RESISTANCE
Alloy X-750 is resistant to a wide variety of industrial corrosives under both oxidizing and reducing conditions. It resists oxidation and attack by other high-temperature corrosion mechanisms.
In hot corrosion tests for automotive applications, weight loss after exposure for 100 hours in 90% Na2SO4 +10% NaCl mixture in air was about 5%. Samples precoated with sodium chloride (by dipping in a hot saturated salt solution), suspended in a furnace at 1700°F and exposed for 100 hr to a moving gas stream of air containing 1% SO2 exhibited a corrosion penetration of approximately 0.007 in. An interesting feature of this alloy is its high resistance to chloride-ion stress-corrosion cracking even in the fully precipitation-hardened condition. Standard U-bend specimens of precipitation-hardened material (hardness, 33 Rc) showed no signs of cracking when exposed to boiling 42% magnesium chloride for 30 days.
HOT FORMING
Sufficiently powerful equipment is important when hot-forming alloy X-750 because of its resistance to deformation.
The recommended temperature range for hot working alloy X-750 is 980 to 1200 °C (1800-2200°F) range. Cooling should be by water quenching or as fast as possible. Localized reheating is not recommended. Annealing after hot working is recommended to ensure maximum corrosion resistance. For hot working, the material may be charged into the furnace at maximum working temperature.
COLD FORMING
Cold working should be carried out on solution-annealed material. Alloy X-750 has a much higher work-hardening rate than austenitic stainless steel and the forming equipment must be designed accordingly.
When cold working is performed, interstage annealing may become necessary.
MACHINING
Alloy X-750 is machined at practical and economical rates. Proper procedures, tooling, and conditions shall be taken. Because of precipitation-hardened alloy X-750’s high strength and hardness, rough machining is usually done before precipitation hardening. Finish machining then follows precipitation treating. Precipitation hardening relieves machining stresses; therefore, allowance must be made for possible warpage. A slight permanent contraction takes place during precipitation treating, but precipitation-treated material has good dimensional stability. Accurate dimensions and a good finish will result from following these practices.
STANDARD SPECIFICATION
Rod, Bar and Forging Stock
ASTM B637/ASME SB637
ISO 9723 / ISO 9724 / ISO 9725
SAE AMS 5667 / SAE AMS 5668 / SAE AMS 5669 / SAE AMS 5670 / SAE AMS 5671 / SAE AMS 5741 / SAE AMS 5747 / SAE AMS 5749
EN 10269
Plate, Sheet and Strip
ISO 6208
SAE AMS 5542 / SAE AMS 5598
Wire
BS HR 505
SAE AMS 5698
SAE AMS 5699
Seamless tube
SAE AMS 5582
Bare welding rods & wire
SAE AMS 5778
SFA 5.14/ A 5.14 (ERNiCrFe-8)
COMPETITIVE ADVANTAGE:
(1) More than 50 years experience of research and develop in high temperature alloy, corrosion resistance alloy, precision alloy, refractory alloy, rare metal and precious metal material and products.
(2) 6 state key laboratories and calibration center.
(3) Hundreds of patent technologies.
(4) Ultra-purity smelting process VIM + IG-ESR + VAR.
(5) High performance material.
BUSINESS TERM
| Minimum order quantity | 500 kilogram |
| Price | Negotiable |
| Packaging details | Water prevent, seaworthy transport, non-fumigation wooden box |
| Mark | As per order |
| Delivery time | 60-90 days |
| Payment terms | T/T, L/C at sight, D/P |
| Supply ability | 200 metric tons / Month |
Contact Person: Mr. lian
Tel: 86-13913685671
Fax: 86-510-86181887
