MONEL
INCONEL
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AEETHER
INCOLOY
HASTELLOY
UNS N07751

Inconel Alloy
751

UNS N07751
  1. AEETHER
  2. GRADES
  3. Inconel 751
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Learn about Inconel 751
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Introduction
Chemical Composition
Data Sheet
Applications
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Introduction

logo of precipitation strengthened alloy

Precipitation
Strengthened Alloy

Nickel
Chromium
Corrosion
Resistance
85
Mechanical
Behavior
88
Purity
88

Overview

As a leading supplier & manufacturer in China, AEETHER supply cost-effective Inconel 751 Products.

INCONEL® alloy 751 (UNS N07751) is a precipitation hardenable nickel-chromium alloy, used mainly for the exhaust valves of internal combustion engines. 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.

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).

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.

Chemical Composition

Data Sheet

Physical Properties

Density g/cm3 8.22
lb/in.3 0.297
Melting Range °F 2540 - 2600
°C 1390 - 1430
Specific Heat Btu/lb-°F 0.103
J/kg-°C 431
Electrical Resistivity ohm-circ mil/ft 731
μΩ-m 1.22
Curie Temperature °F -193
°C -125
Permeability at 200 oersted 15.9 kA/m 1.0035

Mechanical Properties

Temperature Tensile Strength Yield Strength
(0.2% Offset)		 Elongation Reduction of Area Hardness
°F °C ksi MPa ksi MPa % % BHN
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
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Applications