Nickel-based high temperature alloy

GH3030

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GH3030
Chinese grade: GH3030 Nickel-based high-temperature alloy
Russian brand: эи435/XH78T

1. Overview of GH3030 nickel-based high-temperature alloy:
GH3030 is an early developed 80Ni-20Cr solid solution reinforced high-temperature alloy. Its chemical composition is simple below 800℃ and has satisfactory thermal strength and high plasticity, and has good antioxidant, thermal fatigue, cold stamping and welding process performance. After solid solution treatment, the alloy is single-phase austenite, and the structure is stable during use. The main products are cold-rolled thin plates, which can also supply deformed products such as bars, rings, wires and pipes. Mainly used for turbine engine combustion chamber components that operate below 800°C and other high-temperature components that require oxidation resistance below 1100°C but bear very small loads.
2. Chemical composition of GH3030 nickel-based high-temperature alloy: %

C≤	Si≤	Mn≤	P≤	S≤	Cr≥	Ni≥	Mo≥	Cu≤
0.12	0.80	0.70	0.030	0.020	19.0-22.0	Remain	-	-
other	N≤	Al≤	Ti≤	Fe≤	Co≤	V≤	W≤	Nb≤
other	-	0.15	0.15-0.35	1.50	-	-	-	-

Note: 1. The bar and ring blank standards stipulate: ω(Cu)≤0.20%.
2. The standards for cold-drawn wire materials for hot-rolled plates, cold-rolled plates, cold-rolled strips, pipes, wires and cold heading are stipulated: ω(Fe)≤1.00%, ω(P)≤0.015%, ω(S)≤0.010%, ω(Pb)≤0.001%, and ω(Cu)≤0.007%."
3. GH3030 nickel-based high-temperature alloy heat treatment system:
The solution temperature is 980~1020%℃. The cooling pipeline is air-cooled for hot-rolled plates, cold-rolled thin plates and ring blanks. The wire materials for cold heading and cold-pulled rods are water-cooled or air-cooled, and the pipes are water-cooled.
4. GH3030 nickel-based high-temperature alloy varieties and supply status:
Can produce deformation products of various specifications:
1. The rod and ring are damaged and delivered without heat treatment;
2. Hot-rolled plates, cold-rolled thin plates and pipes are supplied after solid solution and pickling;
3. The welding wire is delivered in a cold-pull state, solid solution and pickled state or semi-hard state;
4. The silk material of the cold emblem is delivered in a solid solution, pickled state into a disc or straight strip, solid solution, straight strip, or cold drawn state;
5. The pipe is delivered in solid solution and pickled state; the cold-pulled rod is delivered in annealing, annealing and pickled state, annealing and polished or cold-pulled state."
V. GH3030 nickel-based high-temperature alloy smelting and casting process:
Electric arc furnace smelting or arc furnace smelting plus electroslag remelting or vacuum arc remelting, non-vacuum induction furnace smelting or vacuum arc furnace remelting or vacuum dual process.
VI. Application overview and special requirements of GH3030 nickel-based high-temperature alloy:
The alloy has undergone long-term use tests on aircraft engines and is mainly used for combustion chambers and afterburners, as well as components such as receiver mounting sides.
7. Physical and chemical performance of GH3030 nickel-based high-temperature alloy:
1. Density: ρ=8.4g/cm3.
2. GH3030 thermal performance:
⑴. Dissolution temperature range: 1374-1420℃.
⑵. Thermal conductivity: See the table below

θ/℃	100	200	300	400	500	600	700	800	900
λ/(W/(m.℃))	15.1	16.3	18.0	19.3	20.9	22.2	23.4	25.1	26.4
⑶. Specific heat capacity:See the table below
θ/℃	150	200	300	400	500
c/(J/(kg.K))	565.2	598.7	674.1	741.1	820.6
⑷. Linear expansion coefficient:See the table below
θ/℃	20~200	20~300	20~400	20~500	20~600	20~700	20~800	20~900
α/10^-6℃^-1	12.8	13.5	14.3	15.0	16.1	17.0	17.5	18.0
⑸. Blackness:See the table below
θ/℃	100	200	300	400	500	600	700	800	900
Blackness ①	0.17	0.17	0.2	0.18	0.19	0.27	0.51	0.52	0.53
Note: ① Total radiation blackness (in-air test).
3. Electrical performance:Resistivity for different temperatures: see the table below
θ/℃	100	200	300	400	500	600	700	800	900
Blackness ①	0.17	0.17	0.2	0.18	0.19	0.27	0.51	0.52	0.53
θ/℃	20	100	200	300	400	500	600	700	800
ρ/(10-6Ω.m)	1.090	1.099	1.108	1.117	1.127	1.153	1.135	1.126	1.123
4. Magnetic performance:The alloy is non-magnetic.
5. Antioxidant properties:Oxidation rate in air media: See the table below
θ/℃	900	1000	1100	1200
Oxidation rate/(g/(m².h))	0.0535	0.1560	0.3905	0.5810

8. Metallographic structure of GH3030 nickel-based high-temperature alloy:
The alloy is a single-phase austenite structure after solid solution treatment at 1000 degrees Celsius, with a small amount of TiC and Ti (CN).
9. Process performance and requirements of GH3030 nickel-based high-temperature alloy:
"1. The alloy has good forging performance, the forging heating temperature is 1180℃, and the final forging is 900℃;
2. The average grain size of the alloy is closely related to the degree of deformation of the forging and the final forging temperature;
3. After heat treatment, the oxide scale on the surface of the parts can be removed by sand blowing or pickling."
10. Type specifications and supply status of GH3030 nickel-based high-temperature alloy:
Shanghai Disheng Special Alloy can produce GH3030 seamless pipes, GH3030 steel plates, GH3030 round steel, GH3030 forgings, GH3030 flanges, GH3030 rings, GH3030 welded pipes, GH3030 steel strips, GH3030 wire and supporting welding materials of various specifications.

Variety classification			Delivery status
Seamless tube			Solid solution + acid white, length can be determined
Plate			Solid solution, pickling, cutting edges
Welded pipe			Solid solution acid white + RT% injury detection
Forgings			Annealing + car light
Stick			Forged state, surface polished or car polished
Band material			Cold rolling, solid solution soft state, de-oxidation delivery
Silk material			Solid solution pickled dish-shaped or straight strip, solid solution straight strip finely polished delivery