2.4668 - Superalloys, High temperature alloy

2.4668 Superalloys to DIN 17744 (2002)

DIN 17744 (2002) - Wrought nickel alloys with molybdenum and chromium - Chemical composition
DIN 17750 (2002) - Plates, strips and sheets of wrought nickel and nickel alloys - Properties
DIN 17752 (2002) - Rods and bars of wrought and nickel alloys - Properties
DIN 17753 (2002) - Wires of wrought nickel and nickel alloys - Properties
DIN EN 10088-1 - Stainless steels - Part 1: List of stainless steels
DIN EN 10302 (2002) - Creep resisting steels, nickel and cobalt alloys

Classification and designation for superalloys and high temperature intermetallic materials

Elements	Min.（≥）	Max.（≤）
C	-	0.03
Cr	17.0	21.0
Mo	2.80	3.30
Ni	50.0	55.0
Al	0.20	0.60
Nb	4.75	5.50
Fe	-	Bal
Si	-	0.35
Mn	-	0.35
P	-	0.015
S	-	0.015
B	-	0.006

NiCr19Fe19Nb5Mo3; NiCr19Fe19Nb5Mn3

Proof strength R_p0.2 (MPa)	Tensile strength R_m (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
933 (≥)	612 (≥)	31	23	42	Solution and Aging, Annealing, Ausaging, Q+T,etc	313

Property	Density kg/dm3	Temperature T °C/F	Specific heat J / kgK	Thermal conductivity W/mK	Electric resistance µΩ·cm	Modulus of elasticity kN/mm2
912 (≥)	827 (≥)	22	44	21	Solution and Aging, Annealing, Ausaging, Q+T,etc	431
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
746	728	814

1 EN NiCr19Fe19Nb5Mo3 2 2.4668 3 NiCr19Fe19Nb5Mo3 4 A 1014 N07718 5 B 637 N07718 6 B 670 N07718 7 B 983 N07718 8 N07718 9 Inconel 718 10 Inconel 718

1 UNS NO7718/ Inconel 718 / 2.4668 Round bar

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