ASTM F594 Hex Nuts SS304 SS316 Stainless Steel domed cap nut
ASTM F594 Hex Nuts SS304 SS316 Stainless Steel domed cap nut
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This ASTM F594 specification covers the requirements for stainless steel nuts 0.25 to 1.50 in., inclusive, in nominal diameter in a number of alloys in common use and intended for service applications requiring general corrosion resistance. Seven groups of stainless steel alloys are covered, including ten austenitic, two ferritic, four martensitic, and one precipitation hardening.
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| Group | Alloy | Condition |
|---|---|---|
| 1 | 303, 304, 304L, 305, 384, XM1, 18-9LW, 302HQ, 303Se | (CW) Cold worked |
| 2 | 316, 316L | (CW) Cold worked |
| 3 | 321, 347 | (CW) Cold worked |
| 4 | 430, 430F | (CW) Cold worked |
| 5 | 410, 416, 416Se | (H) Hardened and Tempered |
| 6 | 431 | (H) Hardened and Tempered |
| 7 | 630 (17-4) | (AH) Hardened and Tempered |
ASTM F594 Mechanical Properties / Requirement
|
Stainless Alloy Group |
Condition | Alloy Mechanical Property Marking | Nominal Diameter,in. | Proof Stress, Hex Nuts, ksi Min | Proof Stress, Heavy Hex Nuts, ksi Min | Rockwell Hardness |
|---|---|---|---|---|---|---|
|
1 (303,304,304L, 305384,XM1, 18-19LW, 302HQ 303Se) |
AF | F594A | 1/4 to 1-1/2 | 70 | 76 | B85 max |
| A | F594B | 1/4 to 1-1/2 | 75 | 81 | B65 to 95 | |
| CW1 | F594C | 1/4 to 5/8 | 100 | 108 | B95 to C32 | |
| CW2 | F594D | 3/4 to 1-1/2 | 85 | 92 | B80 to C32 | |
|
2 (316,316L) |
AF | F594E | 1/4 to 1-1/2 | 70 | 76 | B85 max |
| A | F594F | 1/4 to 1-1/2 | 75 | 81 | B65 to 95 | |
| CW1 | F594G | 1/4 to 5/8 | 100 | 108 | B95 to C32 | |
| CW2 | F594H | 3/4 to 1-1/2 | 85 | 92 | B80 to C32 |
ASTM F594 Chemical Component Requirements
| Element | Alloy Group 1, Type 304 | Alloy Group 2, Type 316 |
|---|---|---|
| Carbon | 0.08% | 0.08% |
| Manganese | 2.00% | 2.00% |
| Phosphorus | 0.045% | 0.045% |
| Sulfur | 0.030% | 0.030% |
| Silicon | 1.00% | 1.00% |
| Chromium | 18.0 to 20.0% | 16.0 to 18.0% |
| Nickel | 8.0 to 10.5% | 10.0 to 14.0% |
| Copper | 1.00% | |
| Molybdenum | 2.00 to 3.00% |
| Screws | Washer |
| F593 | SS304 or SS316 |
Application
Suitable Bolts, Hex cap Screw, and studs for use with nuts included in this specification are covered by Specification F593,Unless otherwise specified, All bolts, hex cap screw, and stud used with these nuts shall conform to the requirements of Specification F593 and shall be of the same alloy group
This Standard does not purport to address all of the safety concerns,If any,associated with its use, It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use
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