Description
We are professional INCONEL Alloy 751,Inconel 751,UNS N07751,NCF 751,ASTM B637 Grade 688 round bars ,RODS for,Diesel Engines Exhaust Valves ,Internal Combustion Engine Valves,INCONEL Alloy 751 bars for heavy duty exhaust valves of diesel truck and locomotive
INCONEL 751 is a precipitation hardenable nickel-chromium alloy, used mainly for the exhaust valves of internal combustion engines.The alloy has essentially the same excellent physical, mechanical and corrosion-resistance properties
UNS N07751 was specially designed for internal combustion valve applications, but it can be used in applications that require hot mechanical strength, creep until 870ºC, corrosion specially to fight sulphuric acid corrosion, and fatigue resista
FOllowing is chemical compostion of inconel 751
C 0.10max
Si 0.50max
Mn 0.50max
P 0.010max
S 0.010max
Cr 14.0~17.0
Mo 0.50max
Cu 0.50max
Ti 2.00~2.60
Nb 0.70~1.20
Al 1.10~1.35
Fe 5.0~9.0
Ni 0 70.0min
The most common heat treatments of inconel 751 round bars is as following:
Solution annealing at 1120°C for 1h air cooled,stabilization at 845°C for 24h air cooled and aging at 730°C for 4h and air cooled.
Solution annealing at 1150°C for 2h air cooled, stabilization at 845°C for 24h air cooled and aging at 705°C for 20h air cooled
Hardness: The hardness required for test piece in solution treated and aged conditionshall
be as follows:
a)Hardness Value 30-40 RC min.
Hardness required in supply condition 25-35 RC
Microstructure:The average grain size shall be in the range of 5-9 ASTM E112.Mixed grain shall be avoided.The distribution of carbides shall be uniform.No segregation is allowed
.DIMENSIONAL FEATURES of inconel 751 round bars
FOR GRINDING CONDITION:
DIAMETER TOLERANCES
According to standard ISO h9
Diameters 3 – 6 (mm)
Diameters 6 - 10 (mm)
Diameters 10 - 18 (mm)
According to standard ISO h11 (by special requirement and agreement with the supplier)
Diameters 3 – 6 (mm)
Diameters 6 - 10 (mm)
Diameters 10 - 18 (mm)
OVALIZATION - TRIANGULATION For INCONEL 751
Diameters: Lower or equal to 9,80 mm: 0,020 mm maximum.
Diameters: Between 9,80 mm and 13,00 mm: 0,030 mm maximum. Diameters: Bigger to 13,00 mm: 0,040 mm maximum.
SURFACE FINISHING: For INCONEL 751
Grinding bars.
Roughness: MIN. Ra 12 µinch, MAX. Ra 60 µinch.
ALTERNATIVE: Roughness MAX Ra 110 µinch (by special requirement and agreement with the supplier).
LENGTH TOLERANCE of inconel 751 round bars
The bar length has to be between 4000 - 5000 mm.
The quantity of bars of a length inferior to 4000 mm. must not be higher than 5% of the package or case total.
MANUFACTURING PROCESS of inconel 751 round bars
GRINDING CENTERLESS FOR INCONEL 751
The material has to be tolerance ISO h9 (or h11 according to agreement with supplier).
It must be free from defects.
It must not have cracks, fissures or laps that can cause problems during the hot forging,
Avoid superficial decarburations.
The material must not have cracks, fissures or laps that can cause problems during hot forging, that is to say,
Superficial Decarburation must not exist.
The material has to be tolerance according to agreement with supplier.
It must be free from defects.
It must not have cracks, fissures or laps that can cause problems during the hot forging, Avoid superficial decarburations.
The material must fulfill the dimensional features agreed with the suppliers.
The material must not have cracks, fissures or laps that can cause problems during hot forging, Superficial Decarburation must not exist.
Bending test: 90° minimum without breakage.
INCONEL 751 is a precipitation hardenable nickel-chromium alloy, used mainly for the exhaust valves of internal combustion engines.The alloy has essentially the same excellent physical, mechanical and corrosion-resistance properties
UNS N07751 was specially designed for internal combustion valve applications, but it can be used in applications that require hot mechanical strength, creep until 870ºC, corrosion specially to fight sulphuric acid corrosion, and fatigue resista
Melting method of inconel 751 is Vacuum+ESR or VAR
Following is similar saying of inconel 751 material
FOllowing is chemical compostion of inconel 751
C 0.10max
Si 0.50max
Mn 0.50max
P 0.010max
S 0.010max
Cr 14.0~17.0
Mo 0.50max
Cu 0.50max
Ti 2.00~2.60
Nb 0.70~1.20
Al 1.10~1.35
Fe 5.0~9.0
Ni 0 70.0min
The most common heat treatments of inconel 751 round bars is as following:
Solution annealing at 1120°C for 1h air cooled,stabilization at 845°C for 24h air cooled and aging at 730°C for 4h and air cooled.
Solution annealing at 1150°C for 2h air cooled, stabilization at 845°C for 24h air cooled and aging at 705°C for 20h air cooled
Mechanical property of inconel 751 round bars is as following
|
Temp deg.C |
Tensile N/mm square |
Yield 0.2%Proof stress N/mm square |
|
500 |
1000 |
725 |
|
540 |
1136 |
785 |
|
550 |
980 |
710 |
|
600 |
930 |
690 |
|
450 |
825 |
565 |
|
700 |
770 |
650 |
|
750 |
650 |
560 |
|
800 |
510 |
425 |
Hardness: The hardness required for test piece in solution treated and aged conditionshall
be as follows:
a)Hardness Value 30-40 RC min.
Hardness required in supply condition 25-35 RC
Microstructure:The average grain size shall be in the range of 5-9 ASTM E112.Mixed grain shall be avoided.The distribution of carbides shall be uniform.No segregation is allowed
.DIMENSIONAL FEATURES of inconel 751 round bars
FOR GRINDING CONDITION:
DIAMETER TOLERANCES
According to standard ISO h9
Diameters 3 – 6 (mm)
Diameters 6 - 10 (mm)
Diameters 10 - 18 (mm)
According to standard ISO h11 (by special requirement and agreement with the supplier)
Diameters 3 – 6 (mm)
Diameters 6 - 10 (mm)
Diameters 10 - 18 (mm)
OVALIZATION - TRIANGULATION For INCONEL 751
Diameters: Lower or equal to 9,80 mm: 0,020 mm maximum.
Diameters: Between 9,80 mm and 13,00 mm: 0,030 mm maximum. Diameters: Bigger to 13,00 mm: 0,040 mm maximum.
SURFACE FINISHING: For INCONEL 751
Grinding bars.
Roughness: MIN. Ra 12 µinch, MAX. Ra 60 µinch.
ALTERNATIVE: Roughness MAX Ra 110 µinch (by special requirement and agreement with the supplier).
LENGTH TOLERANCE of inconel 751 round bars
The bar length has to be between 4000 - 5000 mm.
The quantity of bars of a length inferior to 4000 mm. must not be higher than 5% of the package or case total.
MANUFACTURING PROCESS of inconel 751 round bars
GRINDING CENTERLESS FOR INCONEL 751
The material has to be tolerance ISO h9 (or h11 according to agreement with supplier).
It must be free from defects.
It must not have cracks, fissures or laps that can cause problems during the hot forging,
Avoid superficial decarburations.
The material must not have cracks, fissures or laps that can cause problems during hot forging, that is to say,
Superficial Decarburation must not exist.
The material has to be tolerance according to agreement with supplier.
It must be free from defects.
It must not have cracks, fissures or laps that can cause problems during the hot forging, Avoid superficial decarburations.
The material must fulfill the dimensional features agreed with the suppliers.
The material must not have cracks, fissures or laps that can cause problems during hot forging, Superficial Decarburation must not exist.
Bending test: 90° minimum without breakage.
Welcome your inquiry of inxonel alloy 751 material
