Gh698 / Nickel-Based Superalloy Steel / Gh4698 /

• Application: Industrial
• Standard: GB, ASTM
• Purity: >99.5%
• Alloy: Alloy
• Powder: Not Powder
• Transport Package: Wooden
• Model NO.: XD-73
• Origin: Jiangsu Baoying
• HS Code: 7505120000
• Production Capacity: 500ton/Year

Product Description

Product name: Precipitation hardening deformed superalloy

Product number: GH4698

Corresponding grade: Medium (GH698)

Executive standards: GB/T 14992, HB/Z 140, GJB 3782

Product form: bar, tube, plate, ring, forging

Delivery status: hot rolled, cold rolled, solution, aging

Key features of GH4698:

GH4698 is a Ni-Cr-based precipitation hardening deformed superalloy. The operating temperature is 750ºC~800ºC. The alloy is developed on the basis of GH4033 alloy. Compared with GH4033 alloy, the content of aluminum and titanium is increased, and the Niobium and molybdenum, reducing chromium content. The alloy has high lasting strength and tensile strength in the range of 550 ºC ~ 800 ºC, good plasticity and comprehensive properties, and stable structure for long-term use. It is suitable for making long-life heavy-duty parts such as engine turbine disks and compressor disks. The main products are hot rolled and forged bars, discs and rings. After the alloy is aged at 650ºC~750ºC for 100h~1000h for a long time, the structure and performance are stable, and no harmful phase is precipitated.

GH4698 chemical composition:

Carbon: 0.08
Chromium: 13-16
Nickel: balance
Molybdenum: 2.8-3.2
Aluminum: 1.3-1.7
Titanium: 2.35-2.75
Iron: 2.0
Niobium: 1.8-2.2
Zr: 0.05
Manganese: 0.40
Sulfur: 0.60
Phosphorus: 0.015
Copper: 0.07

GH4698 mechanical properties:

Alloy State: Solution Treated

Tensile strength Rm\MPa: ≥1120

Yield strength RP0.2N/MM: ≥705

Elongation after break A5/%: ≥17

Section shrinkage Z/%: ≥

Hardness HBS: ≥293

GH4698 Physical Properties:

Melting temperature range: 1340ºC-1365ºC.

Specific heat capacity: 100ºC, c=410J/(kg·ºC)

Elastic modulus GPa: 223-170 (20ºC-800ºC)

Resistivity: 20ºC, p=1.32x10-6Ω·m.

Thermal conductivity: 10.2 (100ºC)

Linear expansion coefficient: 12.7 (20-100ºC)

Density: p=8.32g/cm3

Magnetic properties: Some alloys are non-magnetic.

GH4698 Melting process

The alloy is smelted by vacuum induction furnace + vacuum arc remelting, or vacuum induction furnace + electroslag remelting.

GH4698 heat treatment system:

A Aviation forgings, (1110~1130)ºC×(8~8.5)h/AC+(990~1010)ºC×(4~4.5)h/AC+(765~785)ºC×(16~16.5)h /AC;

B Aviation disc forgings, 1120ºC±10ºC×8h/AC+1000ºC±10ºC×4h/AC+775ºC±10ºC×16h/AC;

C Aviation fastener bars, (1110~1130)ºC×8h/AC+1000ºC±10ºC×4h/AC+775ºC±10ºC×16h/AC;

D Hot rolled and forged bars, forged rounds, die forgings for gas turbines,

System I: (1110~1120)ºC×8h/AC+1000ºC±10ºC×4h/AC+775ºC±10ºC×16h/AC+700ºC±10ºC×16h/AC;

System II: (1110~1120)ºC×8h/AC+1000ºC±10ºC×4h/AC+775ºC±10ºC×16h/AC.

GH4698 application areas:

Alloys have been used to make aero-engine turbine disks, compressor disks, deflectors, bearing rings and fasteners, etc., and have been used to make large-scale turbine disks for marine gas turbines and other parts, with good batch production and use.

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http://xingda-alloy.en.made-in-china.com
http://xingda-alloy.en.made-in-china.com
 
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