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INCONEL Alloy 751 N07751 For Exhaust Valves Of Internal Combustion Engines

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INCONEL Alloy 751 N07751 For Exhaust Valves Of Internal Combustion Engines

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Brand Name : A-ONE

Model Number : N07751

Certification : ISO

Place of Origin : China

MOQ : 200kg

Price : Negotiable

Payment Terms : T/T

Supply Ability : 2000kg per week

Delivery Time : 45-60 days

Packaging Details : Plywood case

UNS : UNS N07751

Density, lb/in3 : 0.297

Density, g/cm3 : 8.22

Curie Temperature, °F : -193

Curie Temperature, °C : -125

Melting Range, °F : 2540-2600

Melting Range, °C : 1390-1430

Available forms : Round bar, forging, seamless pipe

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INCONEL alloy 751 (UNS N07751) 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 as INCONEL alloy X-750. Its thermal
properties correspond closely to those published for INCONEL alloy X-750.

In the evaluation of materials for exhaust valve applications, nickel-chromium alloys have performed well in a 1675°F (913°C) lead oxide screening test. INCONEL alloy 751 repeatedly offered good results, with corrosion rates averaging 4.31 g/dm2/h. Like other nickel-chromium alloys, INCONEL alloy 751 also resists attack by other exhaust stream impurities such as sulfur, bromine and chlorine.

Chemical composition

Element Nickel (+ Cobalt) Chromium Iron Titanium Aluminum Niobium (+ Tantalum) Manganese Silicon Sulfur Copper Carbon
Weight(%) 70 min 14.0-17.0 5.0-9.0 2.0-2.6 0.9-1.5 0.7-1.2 1.0 max 0.5 max 0.01 max 0.5 max 0.10 max

INCONEL alloy 751 has excellent hot hardness. As a result, hard facing of valve seat areas for good wear-resistance is unnecessary in most applications.

Tensile Properties

Temperature

Yield Strength

(0.2% Offset)

Tensile Strength Elongation Reduction of Area Hardness
°F °C ksi MPa ksi MPa % % HBN
Room Room 141.5 976 190.0 1310 22.5 38.2 352
1200 649 128.9 889 159.6 1100 22.5 32.1 291
1350 732 113.5 783 124.8 860 18.5 25.7 235
1500 816 76.3 526 80.3 554 26.0 35.9 173

Hot working

The hot working range for INCONEL alloy 751 is 1800-2200°F (980-1205°C). The alloy should be reheated to 2200°F (1205°C) whenever its temperature falls below 1800°F (980°C).

Machining

INCONEL alloy 751 is readily machined in the as-hot finished condition. The best procedure is to machine to slightly oversize, precipitation heat treat, then finish to size. A slight permanent contraction (about 0.0003 in/in) takes place during precipitation. Precipitation treated material can
be finish machined to fine finishes and close tolerances, and will have good dimensional stability.

Joining

INCONEL alloy 751 can be joined by the flash butt welding procedures commonly used in valve manufacture. The alloy can also be inertia welded.

Heat treatment

All properties listed in this publication were derived from material direct aged for two hours at 1350°F (732°C). This short-time heat treatment has been found to produce material with the optimum combination of properties consistent with economy. Longer, more complex, aging treatments may be used to improve specific properties required for particular applications. Please consult Special Metals Corporation for further information.

Available forms at A-ONE ALLOY

Round bar, forging, seamless pipe

INCONEL Alloy 751 N07751 For Exhaust Valves Of Internal Combustion EnginesINCONEL Alloy 751 N07751 For Exhaust Valves Of Internal Combustion EnginesINCONEL Alloy 751 N07751 For Exhaust Valves Of Internal Combustion Engines


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INCONEL Alloy 751

      

UNS N07751 INCONEL Alloy

      
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