Introduction

GH1140 is a solid-solution strengthened nickel-based alloy with good heat resistance and excellent weldability. It supports complex forming, resists cracking after welding, and maintains strength. With tungsten, molybdenum, and chromium, it offers strong oxidation and thermal fatigue resistance for long-term high-temperature use. GH1140 superalloy is ideal for aircraft engine parts, gas turbine components, industrial furnaces, and heat exchangers.

Chemical components(%)

Mechanical properties

Physical properties

GH1140 Nickel Alloy Available Products and Specifications

1. GH1140 Nickel Alloy Plates / GH1140 Nickel Alloy Sheets

• Standard Reference: ASTM A240 / GB/T 14995

• Dimension Range: Thickness 0.08–200mm × Width × Length (customized)

• Processes: Forging, hot rolling, cold rolling

• Delivery Condition: Annealed, solution + aging, quenched + tempered, acid-washed, shot blasting

• Inspection: Ultrasonic testing, mechanical property testing, intergranular corrosion test, PMI (positive material identification)

• Application: Used for structural plate components requiring heat resistance and oxidation resistance, such as aircraft engine combustion chamber liners, gas turbine transition ducts, and high-temperature furnace inner walls.

2. GH1140 Nickel Alloy Steel Bar

• Standard Reference: ASTM A276 / GB/T 14994

• Product Forms: Round bar, flat bar, square bar

• Dimension Range: Diameter Φ8–120mm × Length

• Processes: Forging, hot rolling, cold rolling, casting

• Delivery Condition: Black surface, rough turning, shot blasting

• Inspection: Flaw detection, tensile testing, hardness testing, chemical composition re-analysis

• Application: Used for high-temperature fasteners, turbine shafts, support structural parts, valve stems, and other components subjected to high temperature and mechanical stress.

3. GH1140 Nickel Alloy Coil / GH1140 Nickel Alloy Strip

• Standard Reference: ASTM A240 / GB/T 14996

• Dimension Range: Thickness 0.03–16.0mm × Width ≤1200mm

• Processes: Cold rolling, hot rolling

• Delivery Condition: Annealed, solution + aging, quenched + tempered, acid-washed, shot blasting

• Inspection: Surface defect inspection, dimensional accuracy measurement, mechanical property re-testing

• Application: Used for stamped parts, bellows, sealing gaskets, high-temperature insulation layers, and other applications requiring thin gauge and uniform performance.

4. GH1140 Nickel Alloy Pipes / GH1140 Nickel Alloy Tubes

• Standard Reference: ASTM A312 (seamless/welded), ASTM A269 (precision tube)

• Product Types: Seamless pipe, welded pipe

• Dimension Range: OD 6–219mm × Wall thickness 0.5–20.0mm

• Processes: Hot extrusion, cold drawing, welding

• Delivery Condition: Annealed, solution + aging, quenched + tempered, acid-washed

• Inspection: Hydrostatic test, eddy current testing, non-destructive testing (NDT), PMI, mechanical property testing

• Application: Suitable for high-temperature and high-pressure media transport (e.g., aircraft engine bleed air tubes, heat exchanger tube bundles, chemical reactor coils), requiring good thermal fatigue resistance and weldability.

Advantages

(1)High temperature strength at 850°C: GH1140 round bar and forging maintain stable mechanical performance at 850°C, solving the failure problems of ordinary stainless steel in high‑temperature service.

(2)Excellent oxidation and thermal fatigue resistance: Thanks to the optimized ratio of tungsten, molybdenum, and chromium, GH1140 sheet and plate resist oxidation and thermal cycling without cracking, ensuring long‑term reliability in gas turbines.

(3)Good weldability with no significant strength loss: GH1140 welding wire and strip can be joined without cracking or major strength attenuation, meeting the requirements for forming complex components.

(4)Solid‑solution strengthened stability: This nickel‑based superalloy retains structural integrity even after prolonged exposure to high‑temperature environments, making it ideal for industrial furnaces and heat exchangers.

(5)Versatile product forms: Available as round bar, sheet, plate, strip, tube, pipe, and forgings per GB/T or customer specifications, suitable for aero engine and gas turbine components.

Applications

This high-temperature nickel-based alloy is widely used in high-temperature, oxidation-prone environments. Typical applications include:

(1)Aircraft engine components – GH1140 forging and sheet are used in combustion chambers, turbine casings, and afterburner parts requiring 850°C resistance.

(2)Gas turbine parts – GH1140 round bar and seamless tube serve in turbine blades, nozzle rings, and transition ducts for power generation and marine turbines.

(3)Industrial furnaces and heat exchangers – GH1140 plate and pipe are specified for high‑temperature reactor vessels, radiant tubes, and recuperators where oxidation and thermal fatigue resistance are critical.

(4)High‑performance metal structural components – GH1140 strip and welding wire are used in exhaust systems, heat shields, and support rings for demanding high‑temperature environments.

(5)Complex formed parts – GH1140 alloy is the preferred material for manufacturing complex geometries via forming and welding, with excellent high‑temperature structural reliability.

MONO Group is one of Superalloy, Nickel alloy, high Temperature alloy manufacturer&Supplier&Wholesaler from China,We can supply high quality alloy plate,sheet,round bar,tube.pipes,fittings,flange, and custom parts in accordance with ASTM, ASME, DIN, ISO, GB, and other international standards. For inquiries or to request a quote , please freely contact us at info@monokj.com.