ASTM A594 Alloy 303

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ASTM F594 Alloy 303

This specification covers the requirements for Stainless Steel 347 Nuts in imperial size 1/4 inch to 1 1/2 inch, inclusive for number of alloys in common use and intended for service applications requiring general corrosion resistance. ASTM F594 covers Stainless Steel 347 nuts in annealed, cold worked and strained condition. Anand Steels manufactures Hex Nuts in Stainless Steel 347 hex nuts, heavy hex nuts, lock nuts, cap nuts, castle nuts, nylock nuts, dome nuts, thin nuts, hexagon nuts under ASTM F594 specification, duly tested and supply with BS EN 10204 Type 3.1 Certification. ASTM F594A, F594C, F594D, F594F, F594G, F594H are most commonly produced nuts.

astm-f594-type-347-uns-s30300-nuts

ASTM F594 Alloy 303 Nut Supply Condition

Group AlloyA Condition Furnished Unless Otherwise Specified
1 303, 303Se (CW) Cold WorkedB
Notes

A Unless otherwise specified on the inquiry and order, the choice of an alloy from within a group shall be at the discretion of the fastener manufacturer
B Sizes 0.75 inch and larger may be hot worked and solution annealed.

Optional Conditions

A - Machined from annealed or solution annealed stock thus retaining the properties of the original material; or hot formed and solution annealed.
AF - Headed and rolled from annealed stock and then reannealed
CW - Headed and rolled from annealed stock thus acquiring a degree of cold work. Sizes 0.75inch and larger may be hot worked and solution annealed.
SH - Machined from strain hardened stock or cold worked to develop the specific properties.

ASTM F594 Alloy 303 Heat Treatments

Condition A - When Condition A is specified, the austenitic alloys shall be heated to 1900+/- 50°F ( 1038 +/- 28°C), at which time the chromium carbide will go into the solution, be held for a sufficient time, and then be cooled at a rate sufficient to prevent precipitation of the carbide and to provide the specified properties.

Condition CW - When Condition CW is specified, the austenitic alloys shall be annealed in accordance with Condition A, generally by the raw material manufacturer and thenc old worked to develop the specified properties.

Condition AF - When Condition AF is specified, the austenitic alloys shall be annealed in accordance to Condition A after all cold working (including heading and threading) has been completed.

ASTM F594 Alloy 303 Chemical Composition

Composition, %, maximum except as shown
UNS Designation Alloy Carbon Manganese Phosphorus Sulfur Silicon Chromium Nickel Copper Molybdenum
S30300 303 0.15 2.00 0.20 0.15 min 1.00 17.0 - 19.0 8.0 - 10.0 -- 0.60 maxA

ASTM F594 Alloy 303 Nut Mechanical Properties

ConditionB Alloy Mechanical Property Marking Nominal Diameter, inch Proof Load, ksi, min Rockwell Hardness
AF F593A 1/4 to 1-1/2, incl. 70 B85 max, incl.
A F593B 1/4 to 1-1/2, incl. 75 B65 to 95, incl.
CW1 F593C 1/4 to 5/8, incl. 100 B95 to C322, incl.
CW2 F593D 3/4 to 1-1/2, incl. 85 B80 to C32, incl.
SH1 F593A 1/4 to 5/8, incl. 120 C24 to C36, incl.
SH2 F593B 3/4 to 1, incl. 110 C20 to C32, incl.
SH3 F593C 1-1/8 to 1-1/4, incl. 100 B95 to C30, incl.
SH4 F593D 1-3/8 to 1-1/2, incl. 85 B90 to C28, incl.
Notes

AMinimum values except where shown as maximum or as a range.
BLegend of conditions:
CThe yield and tensile strength values for full size products shall be computed by dividing the yield and maximum tensile load value by the stress area for the product size and thread sizes determined in accordance with Test Methods F606.
DYield strength is the stress at which an offset of 0.2 & gauge length occurs.
Conditions
AF - Headed and rolled from annealed stock and then reannealed
CW - Headed and rolled from annealed stock thus acquiring a degree of cold work. Sizes 0.75inch and larger may be hot worked and solution annealed.
SH - Machined from strain hardened stock or cold worked to develop the specific properties.

ASTM F594 Tensile Stress Areas and Threads per Inch

Nominal Size, inch. Coarse Threads - UNC Fine Threads - UNF Thread Series - 8UN
Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2 Threads / inch Stress AreaA, in2
1/4 (0.250) 20 0.0318 28 0.0364 -- --
5/16 (0.3125) 18 0.0524 24 0.0580 -- --
3/18 (0.375) 16 0.0775 24 0.0878 -- --
7/16 (0.4375) 14 0.1063 20 0.1187
1/2 (0.500) 13 0.1419 20 0.1599
9/16 (0.5625) 12 0.1820 18 0.2030
5/8 (0.625) 11 0.2260 18 0.2560
3/4 (0.750) 10 0.3340 16 0.3730
7/8 (0/875) 9 0.4620 14 0.5090
1 8 0.6060 12 0.6630
1 1/8 (1.125) 7 0.7630 12 0.8560 8 0.790
1 1/4 (1.250) 7 0.9690 12 1.0730 8 1.000
1 3/8 (1.375) 6 1.1550 12 1.3150 8 1.233
1 1/2 (1.500) 6 1.4050 12 1.5810 8 1.492

Note
A Tensile stress areas are computed using the following formula:

As = 0.7854 [D- (0.9743/n)]2

Where:
As = Tensile stress area, in2,
D = Nominal size (basic major diameter), in., and
n = number of threads per inch.