GH4169
Facebook
Twitter
LinkedIn
Description
1. Introduction to GH4169 Materials
GH4169 corresponds to the grades Inconel718 (USA) and NC19FeNb (France). GH4169 is a precipitation-strength nickel-based deformation high-temperature alloy. It has good comprehensive performance in the temperature range of -253~650℃ for a long time. The short-term use temperature can reach 800℃. The yield strength below 650℃ ranks first in the deformation high-temperature alloy. It has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, as well as good processing performance, welding performance and long-term structural stability. It can manufacture various complex shapes and has been widely used in aerospace, nuclear energy, petroleum industry and extrusion molds. The main products include hot rolling and forged rods, cold-pulled rods, hot rolled plates, cold rolled plates, steel strips, wire materials, seamless pipes, welded pipes, forgings, etc.
2. Chemical composition of GH4169
| category | C | Cr | In | Co | Mo | Al | Of | Fe | |
| standard | ≤0.08 | 17.0~21.0 | 50~55.0 | ≤1.0 | 2.80~3.30 | 0.30~0.70 | 0.75~1.15 | margin | |
| high quality | 0.02~0.06 | 17.0~21.0 | 50~55.0 | ≤1.0 | 2.80~3.30 | 0.30~0.70 | 0.75~1.15 | margin | |
| Highly pure | 0.02~0.06 | 17.0~21.0 | 50~55.0 | ≤1.0 | 2.80~3.30 | 0.30~0.70 | 0.75~1.15 | margin | |
| category | Nb | B | Mg | Mn | And | P | S | Cu | Ca |
| ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ||
| standard | 4.75~5.50 | 0.006 | 0.01 | 0.35 | 0.35 | 0.015 | 0.015 | 0.3 | 0.010 |
| high quality | 5.00~5.50 | 0.006 | 0.01 | 0.35 | 0.35 | 0.015 | 0.015 | 0.3 | 0.010 |
| Highly pure | 5.00~5.50 | 0.006 | 0.005 | 0.35 | 0.35 | 0.015 | 0.015 | 0.3 | 0.005 |
| category | Bi | Sn | Pb | Ag | With | The | Tl | N | O |
| ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | ≤ | |
| standard | — | — | 0.0005 | — | 0.0003 | — | — | — | — |
| high quality | 0.001 | 0.005 | 0.001 | 0.001 | 0.0003 | — | — | 0.01 | 0.010 |
| Highly pure | 0.00003 | 0.005 | 0.001 | 0.001 | 0.0003 | 0.00005 | 0.0001 | 0.01 | 0.005 |
3. GH4169 physical properties
| density | 8.24g/cm3 |
| Melting point | 1260~1320℃ |
| Magnetic performance | Alloy is non-magnetic |
Minimum value of mechanical properties of alloys at room temperature:
| Alloy status | tensile strength | Yield strength RP0.2 N/mm |
Elongation | Brinell hardness |
| Rm N/mm | A5 % | HB | ||
| Solid melting state | ≥965 | ≥550 | ≥30 | ≤363 |
4. GH4169 smelting process
GH4169 adopts vacuum induction furnace + electroslag re-dissolution, or vacuum induction furnace + vacuum self-consolution re-melting, or vacuum induction furnace + electroslag re-dissolution + vacuum self-consolution re-melting, or vacuum induction furnace + vacuum self-consolution re-melting + electroslag re-dissolution smelting processes.
V. GH4169 material characteristics
It has high tensile strength, fatigue strength, creep strength and fracture strength at 700°C. It has high oxidation resistance at 1000°C.
It has stable chemical properties and good welding properties at low temperatures. Whether in high or low temperature environments, GH4169 alloy has excellent resistance to stress corrosion cracking and pitting. GH4169 alloy has excellent oxidation resistance at high temperatures.
The metallographic structure of GH4169 is an austenite structure. The γ phase generated after precipitation and hardening gives it excellent mechanical properties. The δ phase generated at the grain boundary during the heat treatment makes it very plastic.
VI. Technical standards of GH4169 materials
GB/T14992 “Classification and Grade of High Temperature Materials of High Temperature Alloys and Intermetallic Compounds”
GJB2611A “Specifications for Cold Pulling Rods for High Temperature Alloys for Aviation”
GJB2612 “Specifications for Cold Drawing of High Temperature Alloys for Welding”
GJB3318A “Specifications for Cold Rolled Strip for High Temperature Alloys for Aviation”
GJB3527 “Specifications for Cold Drawing of High Temperature Alloys for Springs”
GJB5280 “Specifications for high-temperature alloy disc forgings for aircraft engines”
GJB5301 “Specifications for High Temperature Alloy Annular Parts for Aero Engines”
GJB712A “Specifications for Forged Round Cakes for Aerospace”
HB 6702-1993 “GH4169 Alloy Rods for WZ8 Series”
Q/6S 1034-1992 “GH4169 Alloy Rods for High Temperature Fasteners”
Q/3B 548-1996 “GH4169 Alloy Forgings”
Q/3B 548-1996 “GH4169 Alloy Forgings”
Q/3B 4048-1993 “YZGH4169 Alloy Rods”
Q/3B 4050-1993 “GH4169 Alloy Rods”
Q/3B 4051-1993 “GH4169 Alloy Wire Material”
7. GH4169 application fields
1. Manufacture various stationary and rotating parts in aviation and aerospace engines, such as discs, rings, receivers, shafts, blades, fasteners, elastic elements, gas conduits, sealing elements, etc. and welded structural parts;
2. Manufacturing various elastic components and grids that can be used in industrial applications;
3. Manufacturing parts and other parts for petroleum and chemical fields.
