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GH2747 Precipitation hardening high temperature alloy ЭП747 up to 1300℃ application

Place of Origin China
Brand Name XUNSHI
Certification ISO9001:2015
Model Number GH2747
Minimum Order Quantity 50 kg
Price Negotiable
Packaging Details Plywood crate
Delivery Time 35 days
Payment Terms T/T
Supply Ability 20 ton per month

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Product Details
Form Of Supply Round Bar, Plate, Seamless Pipe Spec GB/T 14992
Equal Grade ЭП747, Haynes 747
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Product Description

GH2747 Precipitation hardening high temperature alloy

 

General

GH2747 is a Fe-Ni-Cr-based precipitation hardening high-temperature alloy. It is used in a solid solution state. Its long-term operating temperature is 1100℃~1250℃, while its short-term operating temperature up to 1300℃. The alloy has high strength and good Structural stability, excellent oxidation resistance and corrosion resistance. The alloy has good welding properties and can be welded through various processes. The main products include bars, plates, pipes, wires and forgings, etc.

 

Application and features:

GH2747 alloy has been used to make high-temperature anti-oxidation components in aviation and aerospace engine combustion chambers and afterburners. It is also used to make various industrial furnace rollers, transmission devices, thermocouple sleeves and other heat-resistant components. It is especially suitable for high-temperature anti-oxidation device parts in petrochemical, nuclear energy, metallurgy and other fields.

 

The material cost of GH2747 alloy is lower than that of the same type of high-temperature alloy. On the basis of increased chromium and aluminum content, and rare earth elements, the oxidation resistance of the alloy at 1000℃~1300℃ is greatly improved.

 

Similar grade

ЗП747(Russia)

 

Spec

GB/T 14992 Classification and grades of high-temperature alloys and intermetallic compounds high-temperature materials

Q/GYB 511GH2747 alloy hot rolled and forged bars

Q/GYB 512 GH2747 alloy cold drawn (rolled) seamless pipe

 

Smelting process

Vacuum induction furnace, or vacuum induction furnace + electroslag remelting, or non-vacuum induction furnace + electroslag remelting smelting process.

 

Chemical composition

Element C Cr Ni Al Fe
wt, % ≤0.10 15.00-17.00 44.00-46.00 2.90-3.90 Balance
Element Ce Mn Si S P
wt, % ≤0.030 ≤1.00 ≤1.00 ≤0.020 ≤0.025

 

Heat treatment

The material is used as solution treated. 1000°C~1200°C, The holding time depends on the thickness of the material.
Form of supply at Xunshi

Hot rolled & forged rod: diameter 5-300mm

Hot rolled plate: 4-20mm

Cold drawn seamless pipe: diameter 6-100mm

 

Density

7.78g/cm3

 

Thermal conductivity

θ/°C 100 200 300 400 500
λ[W/(m·°C)] 10.5 12.2 13.8 15.4 17.5
θ/°C 600 700 800 900 -
λ[W/(m·°C)] 19.2 20.9 22.6 24.3 -

 

 

Linear expansion coefficient

θ/°C 25-100 25-200 25-300 25-400
α/(10-6°C-1) 13.66 14.29 14.81 15.15
θ/°C 25-500 25-600 25-700 25-800
α/(10-6°C-1) 15.32 15.17 15.80 17.07

 

 

Elasticity

θ/°C 20 100 200 300 400
E/Gpa 218 198 190 188 183
θ/°C 500 600 700 800 900
E/Gpa 177 159 146 128 122

 

 

Oxidation resistance in air

θ/°C Oxidation rate[g/m2·h)]
100h 500h 1000h 2000h
1200 25 - 46 60
1250 28 42 61 75
1300 33 65 - 174
1350 45 130 - -

 

Corrosion resistance in flow air with 1.5% SO2

θ/°C Corrosion rate(mm/year)
1200 0.08
1250 0.10
1300 0.24
1350 -

Mechanical properties

Form Heat treatment θ/°C Mechanical properties
σb/MPa σP0.2/MPa δ5/% Ψ/%
Hot rolled and forged rod Standard 20 ≥550 ≥200 ≥15 ≥20
1000 ≥40 ≥20 ≥30 ≥30
Cold drawn seamless pipe 20 ≥600 - ≥30 -

 

Typical properties of hot rolled rod at different temperature

Specimen/mm θ/°C σb/MPa σP0.2/MPa δ5/% Ψ/%
Diameter 20 hot rolled rod, standard heat treatment 20 600 300 50 55
800 150 100 33 30
900 70 60 35 35
1000 50 30 40 40
1100 30 20 70 55
1200 20 - 90 75

 

Mechanical properties with different heat treatment under 20°C and 900°C

Specimen Heat treatment 20°C 900°C
σb/MPa σP0.2/MPa δ5/% Ψ/% σb/MPa σP0.2/MPa δ5/% Ψ/%
Diameter 20, hot rolled rod 1100°Cx1h/AC 710 290 51 67 117 84 86 82
1130°Cx1h/AC 655 250 52 69 120 82 108 86
1150°Cx1h/AC 670 265 55 66 119 81 97 77
1180°Cx1h/AC 650 240 63 66 121 90 90 82
1200°Cx1h/AC 645 240 63 66 126 88 74 71

 

Mechanical properties aging hardened under 1000°C with different period

Specimen Heat treatment 20°C 1000°C
θ/°C t/h σb/MPa σP0.2/MPa δ5/% Ψ/% σb/MPa σP0.2/MPa δ5/% Ψ/%
Diameter 20 hot rolled rod, standard heat treatment 1000 100 810 330 33 57 64 48 74 98
790 300 39 55 59 38 101 99
300 820 330 39 63 58 38 86 98
805 325 36 58 61 39 79 97
500 800 310 34 58 98 50 76 97
815 330 40 62 64 50 84 97

Forming process and performance

Put alloy ingots into the furnace under a temperature of 1000 °C, forging heating temperature 1000-1200°C, open blank temperature above 1000 °C, final rolling temperature above 900 °C. Cold drawn deforming rate of seamless pipe ≤80%, annealing temperature ≥1000 °C, air cool.

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GH2747 Precipitation hardening high temperature alloy ЭП747 up to 1300℃ application 3GH2747 Precipitation hardening high temperature alloy ЭП747 up to 1300℃ application 4

About XUNSHI

Suzhou Xunshi New Material Co. Ltd- referred as XUNSHI hereafter, is a professional manufacturer of high-performance alloy products. XUNSHI is engaged in supplying high quality and cost-effective Superalloy, Anti-Corrosion Alloy, Precision Alloy, Special Stainless Steel and Magnetostrictive Material to customers worldwide.

 

Why XUNSHI

· Highly experienced in alloy industry

· Top experts of industry in China

· Advanced technology and process from top famous institutes in China

· Advanced devices through whole production and inspection process

· Strict quality control system

· Company motto: best service, most value

· Smart sales policy

 

Service Items of XUNSHI

· Non-standard product research and pre-production

· Fabrication of products

· Cutting, splitting for sheets and plates in stock

· Heat treatment (Solution treatment, aging harden treatment, anneal, spring temper, quench etc.)

· Surface finish (peeling, gridding, polishing)

· Logistics service

· Customized packing service (also for exporting)

· Import and export (XUNSHI is certificated)

· Document translation

· Hard-to-find material sourcing

 

Customers of XUNSHI

Customers of XUNSHI are all over China (Taiwan and Hong Kong included). And we are exporting to USA, Canada, Italy, UK, Poland, Greece, Russia, Turkey, Iran, Israel, South Africa, South Korea, North Korea, India, Argentina, and Brazil and so on. Customers from 30+ countries trust us.

 

Where is XUNSHI

A- XUNSHI is in Huaqiao, Kunshan, 215332 China, which is very closed to Shanghai.

B- Xunshi is around 80KM from Shanghai Pudong International Airport (PVG).

C- 20KM from Shanghai Hongqiao Airport

D- 20KM from Shanghai Hongqiao Railway Station

E- You can contact XUNSHI sales for a pickup service.