GH4169 (original grade: GH169), also known as NS4301, equivalent to Inconel 718, is a precipitation-hardening nickel-based high-temperature corrosion-resistant alloy.
❒ National Standards
တရုတ် |
GB/T 14992-2005 GB/T 14994-2008 GB/T 30566-2014 GJB 712A-2001 GJB 713-1989 HB 6702-1993 |
GH4169 |
GB/T 15007-2017 |
NS4301 |
|
GB/T 26030-2010 |
NW7718 NiCr19Fe19Nb5Mo3 |
|
U.S. |
ASTM B637-2006 ASTM B670-2007 ASTM B983-2013a |
UNS N07718 |
Japan |
JIS G7604:2000 JIS G7605:2001 |
NW7718 NiCr19Fe19Nb5Mo3 |
JIS G4901:1991 JIS G4902:1991 |
NCF718 |
|
Germany |
DIN 17744:2002 DIN 17750:2002 DIN 17752:2002 DIN 17753:2002 DIN EN 10088:1:2005 DIN EN 10302:2002 |
NiCr19Fe19Nb5Mo3 2.4668 |
❒ Ingredient specification (%)
အတန်း |
GH4169 |
N07718 |
NW7718 |
2.4668 |
C |
≤0.08 |
≤0.08 |
≤0.08 |
0.02~0.08 |
Si |
≤0.35 |
≤0.35 |
≤0.40 |
≤0.35 |
Mn |
≤0.35 |
≤0.35 |
≤0.40 |
≤0.35 |
P |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.015 |
S |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.015 |
Cr |
17.0~21.0 |
17.0~21.0 |
17.0~21.0 |
17.0~21.0 |
Ni |
50.0~55.0 |
50.0~55.0 |
50.0~55.0 |
50.0~55.0 |
Mo |
2.80~3.30 |
2.80~3.30 |
2.80~3.30 |
2.80~3.30 |
Co |
≤1.00 |
(≤1.00) |
(≤1.50) |
≤1.00 |
Fe |
margin |
margin |
margin |
margin |
Nb |
4.75~5.50 |
4.75~5.50 |
4.70~5.50 |
4.70~5.50 |
Ta |
— |
|||
Al |
0.20~0.80 |
0.20~0.80 |
0.20~0.80 |
0.30~0.70 |
Ti |
0.65~1.15 |
0.65~1.15 |
0.60~1.20 |
0.60~1.20 |
Cu |
≤0.30 |
≤0.30 |
≤0.30 |
≤0.30 |
Mg |
≤0.01 |
≤0.01 |
≤0.01 |
≤0.01 |
B |
≤0.006 |
≤0.006 |
≤0.006 |
≤0.006 |
❒ Commercial grade
Special Metals |
INCONEL® alloy 718 |
VDM Metals |
VDM® Alloy 718 CTP Nicrofer 5219 Nb |
Aperam |
IMPHY 718 |
HAYNES |
HAYNES® 718 alloy |
CARPENTER |
Pyromet® Alloy 718 |
ATI |
ATI 718™ |
SANDVIK |
Osprey® Alloy 718 |
❒ Physical properties ( GB/T 15007-2017)
Density g/cm 3 |
8.19 |
Thermal conductivity W/(m•℃) |
11.4 |
Specific heat J/(kg•℃) |
435 |
Melting point range °C |
1260~1336 |
Average Linear Expansion Coefficient×10 -6 /℃ (25℃~100℃) |
13.0 |
Young’s modulus GPa |
200 |
❒ Mechanical properties ( GB/T 14994-2008 )
hot where reason |
Solution treatment |
950℃~980℃, 1h air cooling |
|
Aging treatment |
720℃, 8h 50±10℃/h furnace cooling to 620℃, 8h air cooling |
||
force study sex can |
Test temperature °C |
room temperature |
≥ 650 |
Tensile strength MPa |
≥ 1270 |
≥ 1000 |
|
Specified non-proportional elongation strength MPa |
≥ 1030 |
≥ 860 |
|
Elongation after break% |
≥ 12 |
≥ 12 |
|
rate of reduction in area% |
≥ 15 |
≥ 15 |
|
Brinell hardness HBW |
≥345 |
||
high temperature sex can |
Test temperature °C |
650 |
|
Test stress MPa |
690 |
||
time h |
≥ 23 |
||
Elongation after break% |
≥ 4 |
❒ Features
①High mechanical strength, with excellent mechanical properties in the temperature range of -253 to 700 °C, it shows extremely high yield, tensile and creep rupture properties at high temperatures, and the yield strength below 650 °C ranks among the highest in deformed superalloys. first place.
②High corrosion resistance, excellent resistance to stress corrosion cracking and pitting corrosion in chloride-containing media, and excellent resistance to stress corrosion cracking and sulfide stress cracking in acid (containing H 2 S ) oil field environments Ability.
③Good processing performance. Under the condition of solution annealing, the yield strength of the material is low, and the surface hardness is about HRC20 or HRA55, which is suitable for forging.
④Excellent welding performance.
❒ Application
GH4169 has good anti-fatigue, anti-radiation, anti-oxidation, anti-corrosion properties, as well as good processing and welding properties, and can manufacture various parts with complex shapes. Nuclear energy, petroleum industry, cryogenic engineering. Its most extensive application is in the aviation field. Many parts of modern aero-engines, such as turbine disks, blades, casings , shafts, stators, seals, supports, pipes, fasteners, etc., are made of GH4169.