GH3030

High-Temp Steel

GH3030

Precipitation-strengthened Ni-base superalloy. (YB/T 5231; equiv GB GH4169 / UNS N07718). Nominal values—confirm mill certificate.

Chemical Composition (%)

CR19
FE1.5
C0.12
SI0.8
MN0.7
AL0.15
TI0.15

Mechanical Properties

Tensile:≥685 MPa;Elong:≥30%

Chinese Standard

T 5231 GH3030

Equivalent Standards

GB GH4169

Equivalent Grades

Maintain the recommended heat-treatment envelope; prolonged time in embrittlement ranges reduces ductility. Use descaling/protective atmosphere to limit scaling.

Applications

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Available Forms

Forging

Uses

Plate"

Heat Treatment

Heat- and creep-resistant steel for elevated-temperature service with stable strength and oxidation resistance. Used in furnace parts, exhaust manifolds, turbine components, boiler tubes and engine valves.

Precautions

Normally used in the solution-annealed or precipitation-hardened condition; stabilise/age per the grade (e.g., 650–800 °C ageing). Avoid long exposure in the sigma/475 °C embrittlement ranges.

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