ASTM F593
Bolts and screws
Threaded fasteners in a range of head profiles and lengths.
ASTM F593 · ASTM F594
Stainless steel bolts
specified for the service
An ASTM specification brings together material, strength, manufacturing, testing and marking for a reliable industrial joint.
ASTM F593
Typical strength
Up to 150 ksi
F594
Available families
The stainless assembly, piece by piece.
The visual references come from the RYC technical guide. Final geometry, size and standard are confirmed for each requirement.
ASTM F594
Stainless nuts
Matching elements for specified stainless steel assemblies.
Assembly configuration
Stainless washers
Flat, spring and lock washers according to the application.
The full specification
Saying “304” or “316” stainless is not enough.
Those designations mainly describe chemical composition and corrosion resistance. ASTM F593 also sets out technical conditions for manufacturing, testing and marking the fastener.
- Bolt specification
- ASTM F593
- Nut specification
- ASTM F594
- Diameters
- 1/4″ to 1-1/2″
- Dimensional standards
- ASME B18.2.1 · B18.3 · B1.1
01
02
03
04
Typical mechanical properties
Strength depends on the group and the condition.
Values vary with the stainless steel group and the specified manufacturing condition.
| Group / condition | Minimum tensile strength |
|---|---|
| Group 1 · CW | 100 ksi · ≈ 690 MPa |
| Group 1 · SH | 125 ksi · ≈ 860 MPa |
| Group 2 · CW | 100 ksi · ≈ 690 MPa |
| Group 2 · SH | 125 ksi · ≈ 860 MPa |
| Group 3 · HT | Up to 150 ksi · ≈ 1035 MPa |
ASTM F593 classification
Condition and group: two facts that change the selection.
The condition describes the process that sets the strength; the group identifies the type of stainless steel.
CW
Condition 01
Cold worked.
SH
Condition 02
Strain hardened.
HT
Condition 03
Heat treated, mainly for martensitic steels.
AN
Condition 04
Annealed.
| Group | Type | Examples |
|---|---|---|
| Group 1 | Austenitic | 304 · 305 · 384 |
| Group 2 | Austenitic | 316 · 316L |
| Group 3 | Martensitic | 410 |
| Group 4 | Ferritic | 430 · specific applications |
Selection criteria
Information we need to confirm before defining the fastener.
- 01
A standard, not just an alloy
ASTM F593 defines materials, mechanical properties, manufacturing, testing and marking; “304” or “316” mainly describe composition and corrosion resistance.
- 02
Group and condition
The manufacturing condition sets the mechanical strength level of the fastener.
- 03
The complete assembly
Define the ASTM F594 nut, diameter, thread and dimensional requirements of the joint.
Technical support
Need to specify the right stainless steel bolt for your application?
Share diameter, thread, group, condition, nut, quantity and service environment. Our technical team will help you review the requirement.