UNS N04400

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ASTM F467 UNS N04400 represents grade specification for Monel N04400 Nut, Fasteners. It covers both coarse and fine threaded Monel 400 Nuts. Below is the chemical, mechanical and other requirements. ASTM F467 UNS N04400 Fasteners carry EN 10204 Type 3.1 Certification.


ASTM F467 UNS N04400 Chemical Requirements

Composition, %
Nickel and Nickel Base Alloys
UNS Designation Alloy General Name Aluminum Carbon, max Chromium CopperA Iron, max Manganese, max NickelA Phosphorus, max Silicon, max Titanium Cobalt, max Molybdenum Sulfur, max Vanadium Tungsten
N04400 400 Ni-Cu Class A -- 0.30 -- balance 2.50 2.00 63.0 - 70.0 -- 0.50 -- B -- 0.024 -- --

A Elements shown as balance shall be arithmetically computed by deducting the sum of the other named elements from 100.
B Cobalt is to be counted as nickel.
C Alloy 625 material shall be refined using the electrostag remelting process (ESR), or the vacuum arc remelting process (VAR).


ASTM F467 Mechanical Properties (Requirement)

Alloy Mechanical Property Marking Nominal Thread Diameter, inch HardnessA Proof Stress, min, ksi
Ni 400 F 467U all 75 HRB 80

Mechanical Test Requirements for Nuts

Product Proof Stress, ksi Test Conducted Using Full Size Product
Jam, slotted and castle nuts All A --
All other nuts Up to 120 -- A
All other nuts Over 120 A --

A Mandatory Tests.


Tensile Stress Areas and Threads per Inch

Nominal Size, inch. Coarse Threads - UNC Fine Threads - UNF 8 Thread Series - 8UN
Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2
1/4 20 0.0318 28 0.0364 -- --
5/16 18 0.0524 24 0.0580 -- --
3/18 16 0.0775 24 0.0878 -- --
7/16 14 0.1063 20 0.1187
1/2 13 0.1419 20 0.1599
9/16 12 0.1820 18 0.2030
5/8 11 0.2260 18 0.2560
3/4 10 0.3340 16 0.3730
7/8 9 0.4620 14 0.5090
1 8 0.6060 12 0.6630
1 1/8 7 0.7630 12 0.8560 8 0.790
1 1/4 7 0.9690 12 1.0730 8 1.000
1 3/8 6 1.1550 12 1.3150 8 1.233
1 1/2 6 1.4050 12 1.5810 8 1.492

A Tensile stress areas are computed using the following formula: As = 0.7854 [D- (0.9743/n)]2
Where:
As = Tensile stress area, in.2,
D = Nominal size (basic major diameter), in., and,
n = number of threads per inch.


Test Methods

Alloy Test Method
Nickel E38, E76, E354
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