GH2747
Facebook
Twitter
LinkedIn
Description
1. Introduction to GH2747 Material
GH2747 is a high-temperature alloy that can withstand higher operating temperatures. The old brand GH747 is a Fe-Ni-Cr deposition hardening deformation high-temperature alloy that can withstand higher operating temperatures.
GH2747 in solid solution state can be used for a long time at 1100-1250℃, and the short-term use temperature is 1300℃. And the welding performance is good, GH2747 has high strength, good tissue stability, and has good oxidation and corrosion resistance in high-temperature environments.
2. GH2747 implements the standard
GB/T14992-2005 “Classification and Brand of High-Temperature Alloys and Intermetallic Compounds High-Temperature Materials”
Q/GYB511 “GH2747 Alloy Hot Rolled and Forged Rods”
Q/GYB511 “GH2747 Alloy Cold Drawn (Rolled) Seamless
Pipes” GB/T15062 “General Use High-Temperature Alloys”
GJB1952A “Code for Cold Rolled Thin Plates for
High-Temperature Alloys” GJB2297A “Code for Cold Drawn (Rolled) Seamless Pipes for
High-Temperature Alloys” GJB2612 “Code for Cold Drawn Wire Materials for High-Temperature Alloys for Welding”
GJB3165A “Code for Hot Rolled and Forged Rods for High-Temperature Alloys for Aviation”
GJB3317A “Code for Hot Rolled and Forged Rods for Aviation”
GJB3318A “Specifications for Hot Rolled Strips for Aviation High Temperature Alloys
” HB/Z140 “Heat Treatment Process for Aviation High Temperature Alloys”
3. Chemical composition of GH2747
| alloy | % | Fe | Cr | In | Al | Ce | C | Mn | And | S | P |
| Gh2747 | Minimum value | margin | 15.00 | 44.0 | 2.90 | – | – | – | – | – | – |
| Maximum value | 27.00 | 46.0 | 3.90 | 0.030 | 0.10 | 1.00 | 1.00 | 0.020 | 0.025 |
IV. Physical properties
| Density g/cm³ | Thermal conductivity/w/(mk) 100~900℃ |
Linear expansion coefficient/(10-6/k) 20~800℃ |
| 7.78 | 10.5-24.3 | 17.07 |
| Temperature 0/℃ | 20 | 500 | 600 | 700 | 800 |
| Elastic modulus E/GPa | 218 | 177 | 159 | 146 | 128 |
| variety | Heat treatment | Temperature 0/°C | Tensile strength ΣbMPa | Elongation A/% | Section shrinkage Z/%≥ |
| ≥ | ≥ | ||||
| Hot stick | Standard heat treatment | 20 | 550 | 15 | 20 |
| 1000 | 40 | 30 | 30 | ||
| Cold rolled thin plate | Standard heat treatment | 20 | 600 | 30 |
V. Welding performance
The alloy has satisfactory welding process performance and can be welded well by all welding methods. Argon arc welding, spot welding, roller welding and electron beam welding have excellent welding effects. When welding with different materials, the base metal wire can be used as the filling material, or the same type of alloy can be used as the filling material.
6. Application fields
GH2747 is widely used in high-temperature antioxidant equipment parts in nuclear energy, petrochemical, metallurgy and other fields.
GH2747 is suitable for making antioxidant components in engine combustion chambers and afterburner combustion chambers, and is also used to make heat-resistant components such as furnace rollers, boilers, transmission devices, thermocouple sleeves, etc. in the industrial field.
