Nickel and nickel alloys · Alloy 751 / Nicrofer 7016 TiAl / N07751 / 2.4694

Alloy 751 (N07751 / 2.4694): characteristics and supplies

Technical characteristics and properties of Alloy 751

Product Forms	Parameter	Value
Main Specifications		2.4694
Main Specifications		2.4694
Main Specifications		2.4694
Main Specifications	Sheet, plate, strip, rod, billet, wire	2.4694
Main Specifications	Sheet, plate, strip, rod, billet, wire	A 388
Main Specifications	Sheet, plate, strip, rod, billet, wire	A 388
Alloy Name	Sheet, plate, strip, rod, billet, wire	Alloy 751, Nicrofer 7016 TiAl, Inconel 751, VDM Alloy 751, UNS N07751
Alloy Name	Sheet, plate, strip, rod, billet, wire	Alloy 751, Nicrofer 7016 TiAl, Inconel 751, VDM Alloy 751, UNS N07751
Alloy Name	Sheet, plate, strip, rod, billet, wire	Alloy 751, Nicrofer 7016 TiAl, Inconel 751, VDM Alloy 751, UNS N07751
Main Specifications		10228, 10204-3, 10204-2
Main Specifications	Sheet, plate, strip, rod, billet, wire	10228, 10204-3, 10204-2
Main Specifications	Sheet, plate, strip, rod, billet, wire	10228, 10204-3, 10204-2
Main Specifications	Sheet, plate, strip, rod, billet, wire	ASTM
Main Specifications	Sheet, plate, strip, rod, billet, wire	EN
Main Specifications	Sheet, plate, strip, rod, billet, wire	W.Nr.
Main Specifications	Sheet, plate, strip, rod, billet, wire	Analogs

Alloy 751 is a high-performance nickel-chromium alloy, alloyed with titanium, niobium, and aluminum. The unique strength characteristics of the material are achieved through the formation of strengthening phases during heat treatment, namely aging. EV Group China supplies this alloy in annealed or hardened condition. Optimal material performance is achieved after hardening and subsequent aging, which ensures maximum heat resistance, critically important for high-temperature applications.

Chemical composition of Alloy 751 in %

Ni	Parameter	Value
>70,0	Al	0,9-1,5
>70,0	C	<0,10
>70,0	Cr	14,0-17,0
>70,0	Cu	<0,5
>70,0	Fe	5,0-9,0
>70,0	Mn	<1,0
>70,0	Nb	0,7-1,2
>70,0	S	<0,01
>70,0	Si	<0,5
>70,0	Ti	2,0-2,6

Mechanical properties of Alloy 751

Typical strength values for the alloy after hardening and aging at various temperature regimes:

Temperature	Parameter	Value
Yield Strength, Rp0.2	20	104
Yield Strength, Rp0.2	20	716
Yield Strength, Rp0.2	200	670
Yield Strength, Rp0.2	200	97,2
Yield Strength, Rp0.2	400	652
Yield Strength, Rp0.2	400	94,6
Yield Strength, Rp0.2	600	660
Yield Strength, Rp0.2	600	95,7
Yield Strength, Rp0.2	700	660
Yield Strength, Rp0.2	700	95,7
Yield Strength, Rp0.2	800	534
Yield Strength, Rp0.2	800	77,5
Yield Strength, Rp0.2	900	271
Yield Strength, Rp0.2	900	39,3
Yield Strength, Rp0.2	°C	ksi
Yield Strength, Rp0.2	°C	MPa
Elongation	20	24
Tensile Strength Rm	20	1080
Tensile Strength Rm	20	156
Temperature	20	68
Elongation	200	27
Tensile Strength Rm	200	1020
Tensile Strength Rm	200	148
Temperature	200	212
Elongation	400	30
Tensile Strength Rm	400	143
Tensile Strength Rm	400	983
Temperature	400	392
Elongation	600	25
Tensile Strength Rm	600	132
Tensile Strength Rm	600	912
Temperature	600	572
Elongation	700	14
Tensile Strength Rm	700	125
Tensile Strength Rm	700	861
Temperature	700	752
Elongation	800	12
Tensile Strength Rm	800	637
Tensile Strength Rm	800	92,4
Temperature	800	-
Elongation	900	29
Tensile Strength Rm	900	35
Tensile Strength Rm	900	5,08
Temperature	900	-
Elongation	°C	%
Tensile Strength Rm	°C	ksi
Tensile Strength Rm	°C	MPa
Temperature	°C	°F

Physical properties

The material density is 8.2 g/cm³.

Temperature	Parameter	Value
°C	Coefficient of Expansion	10^-6/K
°C	Coefficient of Expansion	10^-6/°F
°C	Modulus of Elasticity	10^6 psi
20	Coefficient of Expansion	-
20	Coefficient of Expansion	-
20	Modulus of Elasticity	213
20	Modulus of Elasticity	30,9
20	Temperature	68
20	Specific Heat	0,103
20	Specific Heat	431
20	Thermal Conductivity	10,5
20	Thermal Conductivity	72,8
20	Electrical Resistivity	123
600	Coefficient of Expansion	14,8
600	Coefficient of Expansion	8,22
600	Modulus of Elasticity	180
600	Modulus of Elasticity	26,1
600	Temperature	1112
600	Specific Heat	0,134
600	Specific Heat	560
600	Thermal Conductivity	137
600	Thermal Conductivity	19,8
600	Electrical Resistivity	130
°C	Modulus of Elasticity	GPa
°C	Temperature	°F
°C	Specific Heat	Btu/lb*°F
°C	Specific Heat	J/kg*°C
°C	Thermal Conductivity	Btuin/sq.fth*°F
°C	Thermal Conductivity	W/m*°C
°C	Electrical Resistivity	µohm*cm

Corrosion resistance and welding

Alloy 751 demonstrates exceptional oxidation resistance at temperatures up to 980 °C, as well as excellent resistance to stress corrosion cracking. When performing welding operations, it is critically important to use specialized filler materials, such as VDM FM 82 or VDM FM 617. To prevent surface contamination with iron, only stainless steel brushes should be used. Argon root shielding is a mandatory procedure to minimize oxidative processes and ensure the integrity of the welded joint.

Advantages and application

High stability of mechanical properties under tension up to 600 °C.
Excellent heat resistance and creep resistance up to 820 °C, which is critical for long-term operation in high-temperature conditions.
Exceptional resistance to oxidative environments in extreme temperature conditions, ensuring component durability.
Application: critical components of internal combustion engines, in particular exhaust valves, where maximum reliability and thermal stability are required.