F593 Bolt Specification
A PORTLAND BOLT Technical resource site
The ASTM F593 specification covers the various requirements for stainless steel studs, hex bolts, and hex cap screws. These requirements include dimensions, markings, and mechanical, and chemical properties.
This specification is for stainless steel fasteners used in industrial or commercial industries. The F593 specification also specializes in high-temperature and corrosive environments.
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. |
There are 7 alloy groups covered under the ASTM F593 specification. Each of these groups has its own requirements and are separated based on their chemical makeup and mechanical properties. The grade page has a more detailed explanation for each group.
Conditions
Each alloy group has anywhere from two to nine conditions. Each condition has its own dimensional, strength, and marking requirements. Each condition may be reviewed more in-depth on the F593 groups page.
Configurations
The F593 specification allows for studs, hex bolts, and hex cap screws. A more detailed explanation can be found on our F593 configuration page.
Product markings
As stated earlier, each condition that is within each alloy group has its own marking requirements. Markings can be found on our F593 configuration page in the markings column.
Dimensional specifications
Each of the seven alloy groups and each condition within the alloy groups has its own dimensional requirements. These requirements may range from ¼” to 1-1/2” in diameter. Conversely, there are no length requirements to speak of.