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ASTM F593 Stainless Steel SS304 / SS304L Cold Forging Hex Bolt
Product Description
This specification for ASTM F593 covers the requirements for stainless steel bolts, hex cap head screws, and studs 1/4 to 1-1/2 in., inclusive,These fasteners are for general purpose usage and are available in seven alloy groups. you can contact our team (info@hainafastener.com) to get more details
304 type stainless steel hex bolt that is ordered as ASTM F593 Group 1 must have additional processes performed that exceed the requirements of A193 grade B8. The bolts must be stamped with a manufacturer’s identifier, “F593″, and the proper condition designation, and if the bolts are hot formed, they must also be carbide solution annealed. Additionally, F593 bolts must pass an intergranular corrosion test, which is not required when bolts are ordered as 304 type stainless steel or under the ASTM A193 grade B8 specification. F593 does not have the same 8UN series thread requirement above 1″ diameter as A193 grade B8, and is typically provided with Unified National Coarse threads. The F593 specification is also characterized by a maximum diameter of 1-1/2”. You can visit our below more details:
ASTM F593 Alloy Material Groups
| Alloy Groups | Alloy Material | Alloy Types |
|---|---|---|
| 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 |
ASTM F593 Chemical Component Requirements
| Element | Alloy Group 1, 304Type | Alloy Group 2, 316 Type |
|---|---|---|
| C | 0.08% | 0.08% |
| Mn | 2.00% | 2.00% |
| P | 0.045% | 0.045% |
| S | 0.030% | 0.030% |
| Si | 1.00% | 1.00% |
| Cr | 18.0 to 20.0% | 16.0 to 18.0% |
| Ni | 8.0 to 10.5% | 10.0 to 14.0% |
| Co | 1.00% | / |
| Mo | / | 2.00 to 3.00% |
ASTM F593 Mechanical Properties
| Alloy Group | Condition | Marking | Size Range | Tensile, ksi | Yield, ksi (Min) | Rockwell Hardness |
| 1 | 0.33 - 0.40% | F593A | 1/4 to 1-1/2 | 65 to 85 | 20 | B85 max |
| 0.90 - 1.20% | F593B | 1/4 to 1-1/2 | 75 to 100 | 30 | B65 to 95 | |
| 0.035% max | F593C | 1/4 to 5/8 | 100 to 150 | 65 | B95 to C32 | |
| 0.040% | F593D | 3/4 to 1-1/2 | 85 to 140 | 45 | B80 to C32 | |
| 2 | 0.15 - 0.35% | F593E | 1/4 to 1-1/2 | 65 to 85 | 20 | B85 max |
| 0.25 - 0.45% | F593F | 1/4 to 1-1/2 | 75 to 100 | 30 | B65 to 95 | |
| 0.25 - 0.45% | F593G | 1/4 to 5/8 | 100 to 150 | 65 | B95 to C32 | |
| 0.45 - 0.65% | F593H | 3/4 to 1-1/2 | 85 to 140 | 45 | B80 to C32 |
Recommended Nuts: F594
Recommended Washers: SS304 / SS 316
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