Inconel X-750 Forgings (UNS N07750)

Q: What is the UNS number for Inconel X-750?

The UNS number for Inconel X-750 is N07750. The equivalent German material number is 2.4669 and the DIN designation is NiCr15Fe7TiAl.

Q: What is the Chinese equivalent of Inconel X-750?

The Chinese GB equivalent of Inconel X-750 is GH4145, also written GH145. It is classified as a nickel-based age-hardenable superalloy under GB/T 14992 and is chemically equivalent to UNS N07750.

Q: What is the maximum service temperature of Inconel X-750?

Inconel X-750 is normally used up to about 700 degrees Celsius (1290 F) where strength governs, and up to about 870 degrees Celsius (1600 F) where only moderate load and oxidation resistance are needed. Oxidation resistance extends to roughly 980 degrees Celsius continuous. Above about 815 degrees Celsius the gamma-prime precipitate coarsens and the alloy loses its strength advantage over solid-solution grades.

Q: What is the density of Inconel X-750?

The density of Inconel X-750 is 8.28 g/cm3, equal to 0.299 lb/in3 or 8280 kg/m3.

Q: What is the difference between Inconel X-750 and Inconel 718?

Inconel X-750 is hardened by a gamma-prime Ni3(Ti,Al) precipitate; Inconel 718 is hardened by a gamma-double-prime Ni3Nb precipitate. Alloy 718 has higher room-temperature strength and is much easier to weld because the slow gamma-double-prime response resists strain-age cracking, but it is limited to about 650 degrees Celsius. X-750 has better stress relaxation resistance and performs better above 650 degrees Celsius, which is why it dominates high-temperature springs, washers and bolting.

Q: What heat treatment do Inconel X-750 forgings receive?

Four cycles cover most orders. Equalizing at 885 degrees Celsius for 24 hours followed by ageing at 704 degrees Celsius for 20 hours gives the highest room-temperature strength and suits springs and bolting. A triple treatment of 1150 degrees Celsius, then 843 degrees Celsius for 24 hours, then 704 degrees Celsius for 20 hours gives the best creep-rupture life for turbine parts. Solution treatment at 1150 degrees Celsius plus a single age at 732 degrees Celsius suits high-strength rotating parts. Solution annealing alone is the supply condition for parts that will be welded or formed.

Grade overview

What is Inconel X-750?

Inconel X-750 (UNS N07750) is a nickel–chromium superalloy, age-hardened by a gamma-prime Ni₃(Ti,Al) precipitate, that is used where a part must stay strong, dimensionally stable and oxidation resistant at temperature. It is essentially Inconel 600 with titanium, aluminium and niobium added so the alloy can be precipitation hardened. It holds proof strength and resists stress relaxation far better than austenitic stainless steel, and it stays ductile down to cryogenic temperatures.

For forged components the working envelope is narrow. X-750 is used for continuous service to roughly 700 °C where strength governs, and to roughly 870 °C where only oxidation resistance and moderate load matter. Above about 815 °C the gamma-prime coarsens and the alloy loses its advantage over solid-solution grades such as Inconel 625 or Haynes 230.

Strength at temperature

Gamma-prime hardening gives roughly three to four times the proof strength of 304 stainless at 650 °C, and good creep-rupture life when triple heat treated.

Relaxation resistance

Springs, Belleville washers and bolting in X-750 retain preload at temperatures where austenitic stainless fasteners have already relaxed.

Oxidation and corrosion resistance

The 15 % chromium content gives a protective oxide up to about 980 °C continuous, with good resistance to carburising and nitriding atmospheres.

Cryogenic toughness

The face-centred-cubic matrix has no ductile-to-brittle transition, so X-750 is also used for cryogenic springs and fasteners.

Data sheet 01

Inconel X-750 chemical composition

Composition limits for UNS N07750 bar, forgings and forging stock, per ASTM B637. Weight percent. Nickel is determined by difference.

Table 1. Inconel X-750 (UNS N07750) chemical composition limits, wt%
Element	Symbol	Min %	Max %
Nickel (plus cobalt)	Ni + Co	70.00	balance
Chromium	Cr	14.00	17.00
Iron	Fe	5.00	9.00
Titanium	Ti	2.25	2.75
Aluminium	Al	0.40	1.00
Niobium plus tantalum	Nb + Ta	0.70	1.20
Manganese	Mn	–	1.00
Silicon	Si	–	0.50
Copper	Cu	–	0.50
Cobalt	Co	–	1.00
Carbon	C	–	0.08
Sulfur	S	–	0.01

Jiangyin Jiangnan Metal Co., Ltd. reports the actual heat analysis for every Inconel X-750 forging on the EN 10204 3.1 certificate, with heat number traceability back to the melt.

Data sheet 02

Physical properties of Inconel X-750

Table 2. Inconel X-750 physical properties (typical, room temperature unless noted)
Property	Metric	Imperial
Density	8.28 g/cm³	0.299 lb/in³
Melting range	1393–1427 °C	2540–2600 °F
Modulus of elasticity	214 GPa	31.0 × 10³ ksi
Modulus of rigidity	83 GPa	12.0 × 10³ ksi
Specific heat (20 °C)	431 J/kg·K	0.103 Btu/lb·°F
Thermal conductivity (20 °C)	12.0 W/m·K	83 Btu·in/ft²·h·°F
Mean thermal expansion (20–100 °C)	12.6 µm/m·°C	7.0 µin/in·°F
Electrical resistivity (20 °C)	1.22 µΩ·m	122 µΩ·cm
Curie temperature	below −196 °C	below −320 °F
Relative permeability (20 °C)	≈ 1.0035	≈ 1.0035

Because the Curie temperature sits below −196 °C, Inconel X-750 is effectively non-magnetic at room temperature and remains so in cryogenic service.

Data sheet 03

Mechanical properties of Inconel X-750 forgings

Properties depend entirely on the heat treatment condition ordered. The figures below are typical values for forged bar, ring and disc sections; the class or temper stated on your purchase order and the certified results on the mill test certificate always govern.

Table 3. Typical room-temperature mechanical properties by heat treatment condition
Condition	0.2 % proof	Tensile	Elong.	R. of area	Hardness
Solution annealed (supply condition for welding and forming)	≈ 380 MPa	≈ 830 MPa	≈ 40 %	≈ 45 %	≤ 235 HB
Solution treated + single age	≥ 620 MPa	≥ 965 MPa	≥ 20 %	≥ 25 %	262–331 HB
Solution treated + triple heat treated	≥ 690 MPa	≥ 1030 MPa	≥ 20 %	≥ 25 %	290–340 HB
Equalized 885 °C + aged 704 °C (No. 1 temper)	≥ 795 MPa	≥ 1170 MPa	≥ 15 %	≥ 20 %	330–390 HB

Table 4. Indicative strength retention at temperature (No. 1 temper forged bar)
Test temperature	Tensile strength	0.2 % proof strength
20 °C / 68 °F	≈ 1200 MPa	≈ 810 MPa
540 °C / 1000 °F	≈ 1090 MPa	≈ 725 MPa
650 °C / 1200 °F	≈ 1000 MPa	≈ 700 MPa
760 °C / 1400 °F	≈ 720 MPa	≈ 620 MPa
870 °C / 1600 °F	≈ 380 MPa	≈ 300 MPa

Design note. Table 4 is indicative only and must not be used as allowable design stress. For pressure-retaining or life-limited parts, work from the applicable design code and request certified test data at your design temperature. We can supply elevated-temperature tensile and stress-rupture testing on the production heat.

Process

Inconel X-750 heat treatment cycles

Four cycles cover almost all forged X-750 orders. Tell us the service temperature and the governing specification and we will confirm which one applies before the order is released.

Table 5. Standard Inconel X-750 heat treatment cycles for forgings
Cycle	Sequence	Where it is used
Equalized and aged (No. 1 temper)	885 °C (1625 °F) / 24 h, air cool → 704 °C (1300 °F) / 20 h, air cool	Springs, Belleville washers, studs, nuts and bolting for service to about 595 °C. Highest room-temperature strength.
Triple heat treatment	1150 °C (2100 °F) / 2 h → 843 °C (1550 °F) / 24 h → 704 °C (1300 °F) / 20 h, air cool	Gas turbine and aero-engine parts needing maximum creep-rupture life between 650 °C and 815 °C.
Solution treated and single aged	1150 °C (2100 °F) / 2 h → 732 °C (1350 °F) / 20 h, air cool	High-strength rotating parts: discs, shafts, spindles and rings at moderate temperature.
Solution annealed only	1093–1150 °C, rapid cool	Supply condition for parts that will be welded, deep-formed or heavily machined. Age after fabrication.

Ageing furnaces are instrumented and surveyed so that soak temperature is held within the tolerance the specification demands. Charts and furnace records are issued with the EN 10204 3.1 certificate on request.

Cross reference

Inconel X-750 equivalent grades and specifications

Table 6. Inconel X-750 international grade equivalents and trade names
System / country	Designation
UNS (USA)	N07750
Werkstoff / EN (Germany)	2.4669
DIN (Germany)	NiCr15Fe7TiAl
ISO	NiCr15Fe7Ti2Al
GB (China)	GH4145 / GH145
AFNOR (France)	NC15TNbA
BS (UK)	HR 505 / HR 605
Common trade names	Inconel X-750, Alloy X-750, Nicrofer 7016 TiNb, Haynes X-750, Pyromet X-750, Superimphy X-750

Table 7. Product specifications covering Inconel X-750
Specification	Product form covered
ASTM B637 / ASME SB-637	Bar, forgings and forging stock for high-temperature service. This is the primary specification for X-750 forgings
ASTM B670	Plate, sheet and strip
AMS 5667 / 5668 / 5669 / 5670 / 5671	Aerospace bars, forgings and rings, temper as ordered
AMS 5542 / 5598	Sheet, strip and plate
AMS 5582	Seamless tubing
AMS 5698 / 5699	Wire and spring wire
DIN 17742 / 17752 / 17754	Bar, wire and forgings (2.4669)
GB/T 14992	Chinese superalloy classification (GH4145)
NACE MR0175 / ISO 15156-3	Sour-service qualification. Hardness and heat-treatment limits apply; confirm the acceptable condition for your service envelope before ordering

Manufacturing capability

Inconel X-750 forged shapes we manufacture

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory. Everything below is forged to your drawing, or to a near-net shape agreed with you. There is no fixed catalogue and no tooling cost for open-die work, so X-750 is practical in quantities from a single prototype upward.

Open-die forged forms supplied in Inconel X-750 (UNS N07750). Rings are produced by punch-and-saddle or ring rolling; discs, shafts and sleeves by upset-and-draw.

Table 8. Inconel X-750 forged product forms and size range
Forged form	Size range	Typical use
Seamless rolled rings	OD 150–2500 mm · wall 30–400 mm · height 20–800 mm	Turbine casing rings, seal rings, bearing races, flange rings
Forged discs and blanks	Ø 100–1800 mm · thickness 20–500 mm	Turbine discs, valve discs, blind flanges, tube sheets
Forged round bars	Ø 20–600 mm · length ≤ 6000 mm	Machining stock for stems, pins, fasteners, springs
Forged shafts and stepped shafts	Ø 60–800 mm · length ≤ 6000 mm	Pump shafts, spindles, eccentric shafts, crankshafts
Forged flanges	WN / SO / BL / LJ · DN15–DN1200 · Class 150–2500	Pressure vessel, exchanger and piping connections
Forged sleeves, bushings and hollow bars	OD 80–1200 mm · ID ≥ 40 mm	Bushings, liners, wear sleeves, cylinder bodies
Forged blocks and rectangles	up to 500 × 1200 × 3000 mm	Valve bodies, die blocks, machined housings
Forged tube sheets	Ø ≤ 2500 mm	Shell-and-tube heat exchangers, air receivers
Single-piece forged weight	5 kg – 3000 kg	Grade dependent; confirm at enquiry stage

Also supplied in X-750: forged valve stems, valve seat rings, valve bodies, nozzles, wheels, rolls, manifolds, gears, plungers, crankshafts and near-net-shape machined components.

How it is made

How Inconel X-750 forgings are produced and tested

The route below is the standard sequence Jiangyin Jiangnan Metal Co., Ltd. follows for every Inconel X-750 order. Hold points and third-party witness inspection can be added at any step.

Melting and raw material

X-750 billet is procured double melted, either by vacuum induction melting followed by electroslag remelting (VIM + ESR) or by EAF + AOD/VOD followed by ESR, to control gas content, sulfur and inclusion cleanliness. Full chemistry is verified against ASTM B637 and the heat number is recorded.
Billet cutting and preparation

Stock is cut to forging weight, surface conditioned to remove defects that would fold into the part, and confirmed by positive material identification before it enters the furnace.
Heating

Billets are soaked at 1150–1200 °C in a calibrated furnace. Nickel superalloys are unforgiving of overheating, so soak time is calculated on section thickness and pyrometry is controlled to specification.
Open-die forging or ring rolling

Upset-and-draw for shafts, bars and blocks; punch-and-saddle or ring rolling for rings. Finishing temperature is held above roughly 980 °C to avoid cracking, with a minimum 3:1 forging reduction to break down the cast structure and give a continuous grain flow that follows the part contour.
Rough machining

Parts are proof machined to remove scale and decarburised skin, expose the surface for inspection, and reach a section that will respond uniformly to heat treatment.
Solution treatment and precipitation ageing

The cycle from Table 5 that matches your specification and service temperature is applied, with furnace charts retained as part of the quality record.
Testing and non-destructive examination

Tensile and hardness testing on production test blanks; grain size and microstructure where specified; ultrasonic testing to EN 10228-3, SEP 1921 or ASTM A388; liquid penetrant to ASTM E165; PMI on the finished part; intergranular corrosion testing where called for.
Final machining, marking and documentation

Finish machining to drawing tolerance, hard stamping or vibro-etch marking with heat and item number, then release with an EN 10204 3.1 works certificate or a 3.2 certificate countersigned by a third party such as TÜV, BV, SGS, DNV or Lloyd's Register.

Where it is used

Inconel X-750 applications by industry

Table 9. Typical Inconel X-750 forged components by industry
Industry	Forged X-750 components	Why X-750
Gas turbine and aero engine	Discs, seal rings, casing rings, spacers, blade retainers, bolting	Creep-rupture strength and relaxation resistance to about 700 °C
Nuclear power	Springs, fasteners, control rod guide components, fuel spacers, jet pump beams	Strength plus resistance to intergranular stress corrosion cracking when given the appropriate high-temperature heat treatment
Oil, gas and subsea	Valve stems, seat rings, gate and plug bodies, downhole tool bodies, packer parts, springs	Strength in sour and chloride-bearing service, subject to NACE MR0175 limits
Aerospace and rocket propulsion	Thrust chamber components, exhaust hardware, airframe fasteners	Strength-to-weight ratio retained at temperature
Chemical and process plant	Pump shafts, tube sheets, flanges, bolting, exchanger internals	Oxidation and corrosion resistance combined with pressure-boundary strength
Heat treatment and metal forming	Furnace fixtures, extrusion dummy blocks, hot-work tooling, forming dies	Retains hardness and oxide protection through repeated thermal cycles
Springs and fasteners	Coil springs, Belleville washers, studs, nuts, retaining rings	Highest relaxation resistance of the common nickel alloys up to 650 °C
Power transmission and heavy machinery	Gears, spindles, rolls, wheels, manifolds, crankshafts	Grain flow from open-die forging gives fatigue strength a bar or casting cannot match

Working with the alloy

Machining, welding and forging guidance

Why Inconel X-750 is difficult to machine

X-750 work hardens rapidly, so the layer left behind by one pass is harder than the material below it. Machining fails when the tool rubs rather than cuts. The working rules are: use a rigid setup with minimum tool overhang; take a positive, generous depth of cut that reaches below the previously work-hardened layer, typically at least 0.5 mm; never let the tool dwell in the cut; keep edges sharp with positive rake; flood with sulfochlorinated cutting oil or a high-concentration emulsion. Carbide tooling runs roughly 15–30 m/min for turning, high-speed steel roughly 5–8 m/min. Where the design allows, machine in the solution-annealed condition and age afterwards, allowing for the small dimensional change that ageing produces.

Welding Inconel X-750

X-750 is weldable but is susceptible to strain-age cracking, because the gamma-prime precipitates in the same temperature band the heat-affected zone passes through on cooling. Weld in the solution-annealed condition rather than the fully aged condition; heat rapidly through the 650–870 °C range; keep restraint low; and solution anneal plus re-age after welding to restore properties. Gas tungsten arc welding with a matching X-750 filler is standard, with alloy 718 or A-286 filler used where the joint design permits. Surfaces must be scrupulously clean. Sulfur, lead, zinc and copper contamination from marking pens, lubricants or handling will crack nickel alloys.

Hot working and forging window

Forge between 1150 °C and 1200 °C and finish above about 980 °C. Reheat rather than continuing to forge a cold billet. Because grain size is set by the finishing reduction, a final reduction of at least 20 % is used where a fine, uniform grain is required for ultrasonic inspectability and fatigue life.

Send the drawing along with the grade. Section thickness, the tolerance you actually need and the governing specification change the forging route and the price far more than the alloy name does. A dimensioned drawing, or a hand sketch carrying the critical dimensions, lets us quote a firm number instead of a range.

Grade selection

Inconel X-750 vs Inconel 718, Nimonic 90 and Inconel 625

The most common question on this grade is whether X-750 or 718 is the right choice. Alloy 718 suits room-temperature strength and weldability up to about 650 °C; X-750 suits relaxation resistance, springs and service above 650 °C.

Table 10. Nickel alloy comparison for forged components
Property	Inconel X-750	Inconel 718	Nimonic 90	Inconel 625
UNS number	N07750	N07718	N07090	N06625
Hardening mechanism	γ′ Ni₃(Ti,Al)	γ″ Ni₃Nb	γ′ Ni₃(Ti,Al)	Solid solution
Typical UTS, aged	1030–1200 MPa	1240–1400 MPa	1100–1250 MPa	830–1000 MPa
Practical service limit	≈ 700 °C	≈ 650 °C	≈ 815 °C	≈ 980 °C
Weldability	Fair, strain-age cracking risk	Good, slow γ″ response	Fair	Excellent
Relaxation resistance	Excellent	Good	Very good	Moderate
Best suited to	Springs, bolting, turbine rings and discs	Rotating aero parts, downhole tools, welded assemblies	Turbine blades, hot rings, exhaust hardware	Corrosion service, bellows, welded pressure parts

All four grades are forged and supplied by Jiangyin Jiangnan Metal Co., Ltd. If you are unsure which suits your duty, send the service temperature, load and environment and we will comment before you commit to a grade.

Questions

Inconel X-750 frequently asked questions

What is Inconel X-750 used for?

Inconel X-750 is used for springs, Belleville washers, bolting and fasteners that must retain preload at temperature; for gas turbine discs, seal rings and casing rings; for nuclear reactor springs and internals; for oil and gas valve stems, seat rings and downhole tools; and for furnace fixtures and hot-work tooling. It is chosen wherever a part must stay strong and dimensionally stable up to about 700 °C.

What is the UNS number for Inconel X-750?

The UNS number for Inconel X-750 is N07750. The equivalent German material number is 2.4669 and the DIN designation is NiCr15Fe7TiAl.

What is the Chinese equivalent of Inconel X-750?

The Chinese GB equivalent of Inconel X-750 is GH4145, also written GH145. It is classified as a nickel-based, age-hardenable superalloy under GB/T 14992 and is chemically equivalent to UNS N07750.

What is the maximum service temperature of Inconel X-750?

Inconel X-750 is normally used up to about 700 °C (1290 °F) where strength governs, and up to about 870 °C (1600 °F) where only moderate load and oxidation resistance are needed. Oxidation resistance itself extends to roughly 980 °C continuous. Above about 815 °C the gamma-prime precipitate coarsens and the alloy loses its strength advantage over solid-solution grades.

What is the density of Inconel X-750?

The density of Inconel X-750 is 8.28 g/cm³, equal to 0.299 lb/in³ or 8280 kg/m³.

Is Inconel X-750 magnetic?

No. Inconel X-750 has a face-centred-cubic austenitic matrix and a Curie temperature below −196 °C, so it is effectively non-magnetic at room temperature with a relative permeability of about 1.0035. It stays non-magnetic in cryogenic service.

What is the difference between Inconel X-750 and Inconel 718?

Inconel X-750 is hardened by a gamma-prime Ni₃(Ti,Al) precipitate; Inconel 718 is hardened by a gamma-double-prime Ni₃Nb precipitate. In practice, 718 has higher room-temperature strength and is much easier to weld because the slow γ″ response resists strain-age cracking, but it is limited to about 650 °C. X-750 has better stress relaxation resistance and holds up better above 650 °C, which is why it dominates high-temperature springs, washers and bolting.

Can Inconel X-750 be welded?

Yes, with care. Weld in the solution-annealed condition rather than fully aged, use gas tungsten arc welding with a matching X-750 filler (alloy 718 or A-286 filler is used where the joint permits), heat rapidly through the 650–870 °C range to limit strain-age cracking, keep restraint low, and solution anneal plus re-age after welding to restore properties. Surfaces must be free of sulfur, lead, zinc and copper contamination.

Why is Inconel X-750 so hard to machine?

It work hardens rapidly, so every pass leaves a harder layer behind. The fix is to cut below that layer rather than rub on it: rigid setup, positive rake, sharp edges, depth of cut of at least 0.5 mm, no dwelling in the cut, carbide tooling at roughly 15–30 m/min for turning, and flood sulfochlorinated cutting oil. Machining in the solution-annealed condition and ageing afterwards is easier where the design allows.

What heat treatment do Inconel X-750 forgings receive?

Four cycles cover most orders. Equalizing at 885 °C for 24 hours followed by ageing at 704 °C for 20 hours gives the highest room-temperature strength and is used for springs and bolting. A triple treatment of 1150 °C, then 843 °C for 24 hours, then 704 °C for 20 hours gives the best creep-rupture life for turbine parts. Solution treatment at 1150 °C plus a single age at 732 °C suits high-strength rotating parts. Solution annealing alone is the supply condition for parts that will be welded or formed.

Which standards cover Inconel X-750 forgings?

ASTM B637 and ASME SB-637 are the primary specifications for X-750 bar, forgings and forging stock. Aerospace orders are usually placed to AMS 5667, 5668, 5669, 5670 or 5671 depending on the temper. ASTM B670 covers plate, sheet and strip; AMS 5582 covers seamless tube; AMS 5698 and 5699 cover wire. DIN 17742, 17752 and 17754 cover material number 2.4669.

What forged shapes can you supply in Inconel X-750?

Jiangyin Jiangnan Metal Co., Ltd. open-die forges Inconel X-750 into seamless rolled rings, discs and blanks, round bars, stepped shafts, flanges, sleeves and bushings, hollow bars, blocks, tube sheets, valve stems, seat rings, nozzles, gears, rolls and near-net-shape machined parts. Because open-die forging needs no dedicated tooling, single prototype pieces are quoted alongside production quantities.

What certification do you supply with Inconel X-750 forgings?

Every order ships with an EN 10204 3.1 works certificate covering heat analysis, mechanical test results, heat treatment condition and non-destructive examination results, with heat number traceability. EN 10204 3.2 certification countersigned by a third-party inspection body such as TÜV, BV, SGS, DNV or Lloyd's Register is available on request, as is third-party witness inspection at agreed hold points.

Is Inconel X-750 acceptable for NACE MR0175 sour service?

Inconel X-750 can be qualified for sour service under NACE MR0175 / ISO 15156-3, but acceptance depends on the heat treatment condition, the resulting hardness and the specific partial pressure, chloride and temperature envelope. Confirm the required condition and hardness cap with your end user, and state it on the enquiry so the correct ageing cycle is applied.

What is the minimum order quantity and lead time for Inconel X-750 forgings?

There is no fixed minimum order quantity for open-die work; single pieces and prototypes are quoted. Lead time depends on billet availability, section size and the heat treatment and testing scope; send your drawing or dimensions to sales@steelforgepieces.com and a delivery date is confirmed with the quotation.

How do I request a quotation for Inconel X-750 forgings?

Email sales@steelforgepieces.com or call +86 189-2135-9659 with the drawing or dimensions, quantity, governing specification, required heat treatment condition, testing scope and certification level. A quotation with price and delivery normally follows within one working day.

The supplier

About Jiangyin Jiangnan Metal Co., Ltd.

Jiangyin Jiangnan Metal Co., Ltd. is an open-die forging factory located at No. 1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China. The company forges carbon steel, alloy steel, tool steel, stainless steel and nickel-based superalloys into rings, discs, shafts, flanges, sleeves, blocks and near-net-shape components, and exports to engineering, energy, petrochemical and machinery customers worldwide.

Jiangyin sits in southern Jiangsu on the Yangtze River, within the forging and special-steel cluster that also serves the Wuxi and Shanghai equipment manufacturers, so material, heat treatment, machining and third-party inspection are all available locally. That matters on superalloy work, where a single subcontracted step in the wrong place adds weeks.

Nickel alloys forged at this plant include Inconel X-750, 718, 625, 600, 601, 617, 690, 706, 725 and 693; Incoloy 800, 800H, 800HT, 825, 901, 925 and 945; Monel 400, K-500 and R-405; Hastelloy C-276, C-22, C-2000, B-2, B-3 and X; Nimonic 75, 80A, 90, 105, 263 and 901; and Waspaloy, Rene 41, Haynes 230, MP35N and Udimet grades.

Reviewed for technical accuracy by the Jiangyin Jiangnan Metal engineering team. Property data on this page is compiled from ASTM B637 and published alloy producer data and is given for guidance only. Certified values for your order are reported on the mill test certificate.

At a glance

Inconel X-750 summary

Inconel X-750 (UNS N07750, W.Nr. 2.4669, DIN NiCr15Fe7TiAl, GB GH4145) is a precipitation-hardenable nickel–chromium superalloy with a density of 8.28 g/cm³ and a melting range of 1393–1427 °C. It is hardened by a gamma-prime Ni₃(Ti,Al) precipitate, is used in service to about 700 °C, and is non-magnetic at room temperature. Forgings are supplied to ASTM B637 and to AMS 5667 through 5671, in the solution-annealed, single-aged, triple-heat-treated or equalized-and-aged condition.

Jiangyin Jiangnan Metal Co., Ltd., an open-die forging factory at No. 1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China, forges Inconel X-750 rings, discs, shafts, flanges, sleeves, bars and tube sheets, with ultrasonic testing to EN 10228-3 or ASTM A388 and EN 10204 3.1 or 3.2 certification. Enquiries: sales@steelforgepieces.com, +86 189-2135-9659.

Get a price

Request an Inconel X-750 forging quotation

Send a drawing, a sketch or just the dimensions. Quotations for open-die forgings normally go out within one working day.

Drawing or dimensions
Quantity required
Governing specification
Heat treatment condition
NDE and testing scope
Certification level (3.1 or 3.2)

Company: Jiangyin Jiangnan Metal Co., Ltd.
Open-die forging factory
Telephone / WhatsApp: +86 189-2135-9659
Email: sales@steelforgepieces.com
Factory address: No. 1 Chengxiqiao Road, Zhouzhuang Town, Jiangyin City, Jiangsu Province, China

Inconel X-750 Forgings UNS N07750 · W.Nr. 2.4669 · NiCr15Fe7TiAl · GB GH4145