At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM A453/A453M. High-temperature bolting materials (bolts, studs, stud bolts and nuts) with coefficients of thermal expansion comparable to austenitic stainless steels, minimizing differential expansion against stainless flanges. Covers grades 651, 660, 662, 665 and 668 in several classes; Grade 660 (A-286, UNS S66286) is the most widely used.
High-temperature bolting materials (bolts, studs, stud bolts and nuts) with coefficients of thermal expansion comparable to austenitic stainless steels, minimizing differential expansion against stainless flanges. Covers grades 651, 660, 662, 665 and 668 in several classes; Grade 660 (A-286, UNS S66286) is the most widely used.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Grade 660 | S66286 (A-286) | Precipitation-hardened austenitic; classes A/B/C/D |
| Grade 651 | S63198 (19-9DL) | Austenitic; classes A/B |
| Grade 662 | S66220 | Austenitic; classes A/B |
| Grade 665 | S66545 | High-strength austenitic; classes A/B |
| Grade 668 | N08700 type | Austenitic; classes A/B |
Minimum mechanical requirements per ASTM A453/A453M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| 651 Class A | 100 (690) | 60 (415) | 18 | 217-277 HBW |
| 651 Class B | 95 (655) | 50 (345) | 18 | 212-269 HBW |
| 660 Class A/B/C | 130 (895) | 85 (585) | 15 | 248-341 HBW |
| 660 Class D | 130 (895) | 95 (655) | 15 | 248-321 HBW |
| 662 Class A | 130 (895) | 85 (585) | 15 | 248-321 HBW |
| 665 Class A | 170 (1170) | 120 (825) | 12 | 311-388 HBW |
| 665 Class B | 155 (1070) | 120 (825) | 12 | 311-388 HBW |
| 668 Class A/B | 130 (895) | 85 (585) | 15 | 248-341 HBW |
| Grade | Key Composition, % |
|---|---|
| 660 (A-286) | C 0.08 max, Cr 13.5-16.0, Ni 24.0-27.0, Ti 1.90-2.35, Mo 1.00-1.50, V 0.10-0.50 |
| 651 (19-9DL) | C 0.28-0.35, Cr 18-21, Ni 8-11, Mo 1.0-1.75, W ~1.0-1.75 |
ASME SA-453 (BPVC Sec. II) is the ASME adoption of ASTM A453/A453M with essentially identical content. Grade 660 corresponds to UNS S66286 / A-286 / AMS 5731-5737. Commonly paired with A453 Gr 660 or A194 Gr 8 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 A453/A453M 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.
High-temperature bolting materials (bolts, studs, stud bolts and nuts) with coefficients of thermal expansion comparable to austenitic stainless steels, minimizing differential expansion against stainless flanges. Covers grades 651, 660, 662, 665 and 668 in several classes; Grade 660 (A-286, UNS S66286) is the most widely used.
Ananka Fasteners supplies Grade 660, Grade 651, Grade 662, Grade 665, Grade 668 to ASTM A453/A453M. 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 A453/A453M 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 A453/A453M 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 A453/A453M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM A453/A453M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
