Super Alloy Nickelvac 400™ (UNS N04400)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Forming
     Welding
     Heat Treatment
     Forging
     Hot Working
     Cold Working
     Annealing
     Hardening
Applications


Introduction

Super alloys have good creep and oxidation resistance. They are also known as high performance alloys, and can be formed in different shapes. They can be strengthened by work hardening, precipitation hardening, and solid-solution hardening. They have the ability to function at very high temperatures and under severe mechanical stress, and also where high surface stability is required. Cobalt-based, nickel-based, and iron-based alloys are three types of super alloys.

Nickelvac 400™ is a nickel-copper alloy having resistance to sea water corrosion, different kinds of acids and other corrosive media. The following datasheet gives an overview of Nickelvac 400™.

Chemical Composition

The chemical composition of Nickelvac 400™ is given in the following table.

Element Content (%)
Nickel, Ni 66
Copper, Cu 31
Iron, Fe 1.2
Manganese, Mn 1
Silicon, Si 0.25
Carbon, C 0.15
Sulfur, S 0.01

Physical Properties

The following table shows the physical properties of Nickelvac 400™.

Properties Metric Imperial
Density 8.83 g/cm³ 0.319 lb/in³
Melting point 1330°C 2425°F

Mechanical Properties

The mechanical properties of Nickelvac 400™ are outlined in the following table.

Properties Metric Imperial
Tensile strength 551 MPa 79900 psi
Yield strength (at strain 0.200%) 241 MPa 35000 psi
Elongation at break 40% 40%
Reduction of area 70% 70%
Hardness, Rockwell B 70 70

Other Designations

Other designations that are equivalent to Nickelvac 400™ include:

AMS 4574 AMS 4731 ASTM B165 ASTM F467 DIN 2.4366
AMS 4575 ASTM B127 ASTM B366 ASTM F468 MIL N-24106
AMS 4675 ASTM B163 ASTM B513 ASTM F96 MIL T-1368
AMS 4730 ASTM B164 CLASS A ASTM B564 DIN 2.4360 MIL T-23520
QQ N281        

Fabrication and Heat Treatment

Machinability

Nickelvac 400™ can be machined using conventional machining methods which are used for iron-based alloys. Machining operations are performed using commercial coolants. High-speed operations such as grinding, milling or turning, are performed using water-based coolants.

Forming

Nickelvac 400™ can be formed using all conventional techniques

Welding

Nickelvac 400™ is welded using gas-tungsten arc welding, shielded metal-arc welding, gas metal-arc welding, and submerged-arc welding methods

Heat Treatment

Nickelvac 400™ does not respond to heat treatment.

Forging

Nickelvac 400™ has good forgeability.

Hot Working

Nickelvac 400™ has good hot working capacity.

Cold Working

Nickelvac 400™ can be cold worked using standard tooling.

Annealing

Nickelvac 400™ is annealed at 927°C (1700°F). It can be stress-relief annealed at 566°C (1050°F) for 1 to 2 hours followed by cooling.

Hardening

Nickelvac 400™ is hardened by cold working.

Applications

Nickelvac 400™ is used in chemical plant equipments as they have good corrosion resistance. They are also used in pumps, marine fixtures, and piping systems for sea water applications.

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