Introduction

GH3128 nickel alloy (GH128) is a solid‑solution strengthened Ni‑Cr based superalloy. It offers high plasticity, high creep strength, excellent oxidation resistance, and good stamping and welding properties. GH3128 round bar, sheet, plate, strip, seamless tube, wire, and forging are widely used in aero engine combustion chamber flame tubes, afterburner casings, regulator plates, and other high‑temperature parts that operate at 950°C for long‑term service. Its overall performance is superior to similar nickel‑based solid solution alloys such as GH3044 and GH3536. Available per GB/T 14992 or customer specifications. For demanding high‑temperature applications requiring reliable stress rupture and formability, GH3128 superalloy is a proven choice.

Chemical components（%）

Mechanical properties

Physical properties

GH3128 Superalloy Available Products and Standard

GB/T 14992 (Superalloys – Classification and Specifications)

Grade: GH3128 / GH128

Type: Round Bar / Sheet / Plate / Strip / Wire / Seamless Tube / Forgings

Size Range:

Wire: 0.1 – 15.0 mm dia

Strip: 0.05 – 5.0 mm thick × 5 – 500 mm wide

Round Bar: 8 – 355 mm dia

Sheet / Plate: 0.5 – 180 mm thick

Seamless Tube: Custom sizes available

Surface: Annealed, Bright, Pickled, Ground

Testing: Chemical analysis, mechanical test (tensile strength, yield strength, elongation), hardness test, high-temperature stress rupture test, oxidation resistance test, stamping test, dimensional inspection

Advantages

(1)High creep strength and plasticity: GH3128 round bar and forging offer high lasting creep strength and excellent plasticity at 950°C, outperforming GH3044 and GH3536 in long‑term high‑temperature service.

(2)Excellent oxidation resistance: GH3128 sheet and plate resist oxidation effectively, maintaining surface integrity in aero engine afterburner casings and combustion chambers.

(3)Good stamping and welding properties: GH3128 strip and welding wire are readily formed and welded, enabling fabrication of complex flame tube structures with reliable joints.

(4)Grain boundary strengthening: Boron, cerium, and zirconium additions enhance high‑temperature stability, giving GH3128 seamless tube superior resistance to thermal fatigue and stress rupture.

(5)Superior to GH3044 & GH3536: With balanced performance, GH3128 superalloy is the preferred choice for 950°C components requiring both strength and formability.

Applications

(1)Aero engine combustion chambers – GH3128 sheet and strip are used for flame tubes, liners, and swirlers operating at 950°C with long‑term reliability.

(2)Afterburner casings and regulator plates – GH3128 plate and forging withstand high thermal gradients and oxidation in exhaust sections of military aircraft.

(3)Gas turbine hot‑section components – GH3128 round bar and seamless tube serve in turbine casings, transition ducts, and support rings.

(4)High‑temperature structural parts – GH3128 wire and welding wire are applied in fasteners, springs, and welded assemblies requiring creep resistance up to 950°C.

(5)Nuclear and industrial heat exchangers – GH3128 seamless tube provides oxidation and creep resistance for intermediate heat exchanger tubes in high‑temperature gas‑cooled reactors.

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.