ASTM F594 Grades
| F594 Alloy Groups | ||
|---|---|---|
| Alloy Group | Alloy Designation | Alloy Type |
| 1 | 303, 304, 304L, 305, 384, XM1, 18-9LW, 302HQ, 303Se | Austenitic |
| 2 | 316, 316L | Austenitic |
| 3 | 321, 347 | Austenitic |
| 4 | 430, 430F | Ferritic |
| 5 | 410, 416, 416Se | Martensitic |
| 6 | 431 | Martensitic |
| 7 | 630 (17-4) | Precipitation Hardening |
*The selection of an alloy within each group is at the discretion of the manufacturer unless the purchaser requests a specific alloy.
| F594 Mechanical Properties / Condition | ||||||
|---|---|---|---|---|---|---|
| Alloy Group | Condition | Marking | Diameter Range | Proof Stress, Hex Nuts, ksi | Proof Stress, Heavy Hex Nuts, ksi | Rockwell Hardness |
| 1 | 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 | 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 | |
| F594 Chemical Requirements | ||
|---|---|---|
| Element, max except as shown | Alloy Group 1, Type 304 | Alloy Group 2, Type 316 |
| Carbon | 0.08% | 0.08% |
| Manganese | 2.00% | 2.00% |
| Phosphorus | 0.05% | 0.05% |
| Sulfur | 0.03% | 0.03% |
| 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% |
All information derived from globally recognized specifications, subject to change, user discretion is advised.
