At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM F594. Standard specification covering the requirements for stainless steel nuts (hex, heavy hex and related) in austenitic, ferritic, martensitic, and precipitation-hardening alloy groups and various conditions, for use with ASTM F593 stainless bolts and screws.
Standard specification covering the requirements for stainless steel nuts (hex, heavy hex and related) in austenitic, ferritic, martensitic, and precipitation-hardening alloy groups and various conditions, for use with ASTM F593 stainless bolts and screws.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Group 1 | S30400/S30500/S38400 (304/305/384) | Austenitic 18-8 |
| Group 2 | S31600 (316) | Austenitic Mo-bearing |
| Group 3 | S32100/S34700 (321/347) | Austenitic stabilized |
| Group 4 | S43000 (430) | Ferritic |
| Group 5 | S41000 (410) | Martensitic |
| Group 6 | S43100 (431) | Martensitic |
| Group 7 | S17400 (630) | Precipitation hardening 17-4PH |
Minimum mechanical requirements per ASTM F594.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Gr 1/2 (304/316) Cond. AF (hex) | – | – | – | B85 max; proof stress 70 ksi (483 MPa) |
| Gr 1/2 (304/316) Cond. A (hex) | – | – | – | B65-95; proof stress 75 ksi (517 MPa) |
| Gr 1/2 (304/316) Cond. CW1 hex (1/4-5/8) | – | – | – | B95-C32; proof stress 100 ksi (690 MPa) |
| Gr 1/2 (304/316) Cond. CW2 hex (3/4-1.5) | – | – | – | B80-C32; proof stress 85 ksi (586 MPa) |
| Gr 1/2 (304/316) Cond. A (heavy hex) | – | – | – | B65-95; proof stress 81 ksi (558 MPa) |
| Gr 6 (431) Cond. CW | – | – | – | C24-36; proof stress 100 ksi (690 MPa) |
| Gr 7 (630/17-4PH) Cond. H | – | – | – | C28-38; proof stress 120 ksi (827 MPa) |
| Grade | Key Composition, % |
|---|---|
| 304 (S30400) | Cr 18-20, Ni 8-10.5, C 0.08 max |
| 316 (S31600) | Cr 16-18, Ni 10-14, Mo 2-3, C 0.08 max |
| 410 (S41000) | Cr 11.5-13.5, C 0.15 max |
| 431 (S43100) | Cr 15-17, Ni 1.25-2.5, C 0.20 max |
| 630/17-4PH (S17400) | Cr 15-17.5, Ni 3-5, Cu 3-5, Nb 0.15-0.45 |
Companion bolt standard is ASTM F593. Corresponds to ISO 3506-2 stainless nut classes (A2/A4). Proof-load stress differs for hex vs heavy hex nuts.
For the official ASTM International standards catalogue, see the ASTM International standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply ASTM F594 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
Standard specification covering the requirements for stainless steel nuts (hex, heavy hex and related) in austenitic, ferritic, martensitic, and precipitation-hardening alloy groups and various conditions, for use with ASTM F593 stainless bolts and screws.
Ananka Fasteners supplies Group 1, Group 2, Group 3, Group 4, Group 5, Group 6, Group 7 to ASTM F594. See the Grades / Classes Covered table above for full details of each grade.
Minimum tensile strength, yield strength, elongation and hardness requirements vary by grade — see the Mechanical Properties table above for the complete breakdown.
We supply ASTM F594 fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
Yes. For a quotation, provide the required fastener type, grade, nominal size, dimensional standard, quantity and any inspection or certificate requirements.
Need a fastener released to ASTM F594 for an industrial project? Send the required fastener type, grade, size, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: ASTM F594 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM F594 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
