GH3128 High-Temperature Alloy Round Bar (Ni-Cr-Mo-W Alloy) | Superior High-Temperature Strength & Oxidation Resistance

✓ Ultra-High Temperature Stability: Forms a protective Cr₂O₃/MoO₂ oxide layer at 1050°C (1922°F), reducing scaling by 85% vs. Inconel 601.

✓ Thermal Fatigue Mastery: Withstands 12,000+ thermal cycles between 20°C–1000°C (68°F–1832°F) without microcracking.

✓ Corrosion Resistance: Immune to sulfidation and chloride stress corrosion in H₂S/Cl⁻-rich environments up to 750°C (1382°F).

✓ Precision Machinability: Hot-rolled and cold-drawn bars with **±0.5% diameter tolerance** and Ra ≤0.6μm surface finish for CNC applications.

GH3128 High-Temperature Alloy Round Bar (Ni-Cr-Mo-W Alloy)

Engineered for aerospace, industrial furnace, and energy applications requiring extreme thermal stability and oxidation resistance, GH3128 high-temperature alloy round bar combines a nickel-chromium-molybdenum-tungsten matrix (Ni-65%, Cr-20%, Mo-10%, W-3%) to deliver exceptional creep resistance, thermal fatigue strength, and corrosion resistance up to 1050°C (1922°F). Certified to GB/T 14992, AMS 5875, and ASTM B572, this alloy outperforms Inconel 601 and Haynes 230 in cyclic high-temperature environments, offering 2.5x the lifespan of 310S stainless steel while enabling precision machining for critical components.

Diameter Range: 5mm–300mm (hot-rolled) / 3mm–100mm (cold-drawn)
Length: 1m–6m standard (cut-to-length precision ±0.5mm)
Surface Finishes: Pickled & Passivated, Polished (Ra ≤0.4μm), Electropolished (Ra ≤0.2μm)
Mechanical Properties (Room Temp): Yield Strength ≥380 MPa | Tensile Strength ≥780 MPa | Elongation ≥28% | Hardness ≤210 HBW

Parameter Category	Value/Description
Material Standard	GB/T 14992 (China), GB/T 14994 (Round Bar)
Chemical Composition (%)	Ni (Balance), Cr 19–22, Mo 7.5–9.5, W 5.0–7.0, Al ≤0.5, Ti ≤0.5, Fe ≤2.0, C ≤0.10, Mn ≤0.50, Si ≤0.80, S ≤0.015, P ≤0.015, La ≤0.05
Tensile Strength (MPa)	≥785 (Solution Treated)
Yield Strength (MPa)	≥345 (Solution Treated)
Elongation (%)	≥30 (in 50mm gauge length)
High-Temperature Strength	– 950°C: Tensile Strength ≥295 MPa – 950°C: 100h Creep Rupture Strength ≥78 MPa
Hardness	Brinell (HBW): ≤220
Density (g/cm³)	8.7
Melting Range (°C)	1370–1420
Thermal Conductivity (W/m·K)	12.5 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	16.8 (20–1000°C)
Electrical Resistivity (Ω·m)	1.30 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	205
Oxidation Resistance	Excellent oxidation resistance up to 1150°C in air. Stable under cyclic thermal stress.
Corrosion Resistance	Resists carburization, sulfidation, and chlorine-containing environments at high temperatures.
Heat Treatment	Solution Treatment: 1180–1220°C (air or water cooling). No aging required.
Surface Finishes	Hot-rolled, Cold-drawn, Annealed & Pickled, Ground, Polished (Ra ≤0.8μm).
Round Bar Dimensions	– Diameter: 5mm–300mm (Cold-Finished) – Diameter: 10mm–500mm (Hot-Finished) – Length: 1000mm–6000mm (customizable).
Key Applications	Aerospace engine combustion chambers, gas turbine blades, industrial furnace components, nuclear reactor parts, and rocket engine nozzles.

GH3128 High-Temperature Alloy Round Bar (Ni-Cr-Mo-W Alloy) Applications

Industry	Critical Components	GH3128 Round Bar Advantage
Aerospace	Rocket engine combustion chambers, turbine blades	0.02mm oxidation depth after 800h at 1050°C (1922°F).
Power Generation	Gas turbine vanes, exhaust ducting	Resists thermal fatigue in 20°C–1000°C cycles with zero deformation.
Industrial Furnace	Carburizing trays, radiant tubes	Withstands continuous operation at 1000°C (1832°F).
Oil & Gas	Hydroprocessing reactor shafts, flare tips	Immune to H₂S/Cl⁻ corrosion at 750°C (1382°F).

GH3128 High-Temperature Alloy Round Bar (Ni-Cr-Mo-W Alloy) Product Packaging

GH3128 High-Temperature Alloy Round Bar (Ni-Cr-Mo-W Alloy) are engineered for aerospace turbines, nuclear reactors, and high-stress industrial applications (operating up to 1,300°C). To ensure dimensional accuracy and metallurgical integrity during global transit, we deploy aerospace-grade packaging systems and thermal-controlled logistics compliant with AMS 5662, NACE MR0175, and ISO 4955 standards.

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