Full Transcript Here:

Hey what’s up guys?!?! This is Michael with Michael Talks Metal back for another session on some Nickel but we’re pivoting off Inconel and steering towards the Monel. Not to be confused w/the son of Jor-el! (Kneel before zod)

Today’s topic is Monel alloy 400 when produced by Special Metals Corporation or simply alloy 400 in a generic form by other producing mills.  UNS designation for the chemical composition is  N04400

A solid solution of nickel and copper, it cannot be strengthened by heat treatment.

Cold work can increase strength as in other commercial alloys. Typical of all the Monel alloys,it has an excellent combination of strength, toughness, and ease of fabrication.

Excellent salt water corrosion performance leads to many marine applications such as valves, pumps, propellers, shafts, fixtures, fasteners, and fittings.

Monel is found in NACE applications in petroleum production and refining. Other  chemical processing equipment applications take advantage of its corrosion performance and thermal properties. It is recognized in many ASME standards for applications within the Boiler and Pressure Vessel Code for condensers, heat exchangers, piping, and pressure vessels.

Chemical Composition   UNS N04400

Nickel (plus Cobalt)  …………………………………………….  63 % Minimum

Copper  ………………………………………………………………  28. 0 – 34.0 %

Carbon  ………………………………………………………………  0.3 % Maximum

Manganese  ………………………………………………………..  2.0 % Maximum

Iron  ……………………………………………………………………  2.5% Maximum

Sulfur  …………………………………………………………………  0.024% Maximum

Silicon  ………………………………………………………………..  0.5% Maximum

Density …….  .318 pounds per cubic inch

Typical room temperature  mechanical properties in the annealed condition:

Tensile strength ………..  75,000  –  95,000   psi

Yield strength  ………….. 25,000  –  50,000  psi

Elongation  ……………….   60  – 35 %

Curie temperature  …………..  70 – 120  deg F  ( dependent on actual chemistry)  making alloy 400  not reliably non-magnetic in near room temperature environments

Specifications

Bar and Forgings:

AMS 4675,  QQ-N-281

ASTM B 164, ASTM B 564

ASME SB 164, ASME SB 564

Plate and Sheet:

AMS 4544, QQ-N-281

ASTM B 127

ASME SB 127

Pipe and Tube:

AMS 4574

ASTM B163, ASTM B 165, ASTM B 725, ASTM B 730, ASTM B 751,  ASTM B 775, ASTM B 829

ASME SB163, ASME SB165, ASME SB725, ASME SB730, ASME SB 751,      ASME SB 775, ASME SB 829

Each specification has requirements that can add to or restrict the chemical composition or properties beyond what we have shown you today.  Additional processing and testing requirements exist in the individual specifications.

So we always say CHECK ….THE……. SPECS!!!!

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