At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM A490/A490M. Quenched-and-tempered alloy-steel heavy hex structural bolts, 1/2 in through 1-1/2 in diameter, 150 ksi minimum tensile, for high-strength structural steel connections. ASTM A490 was withdrawn in 2016 and replaced by ASTM F3125 Grade A490; content carried forward. Type 1 is alloy steel; Type 3 is weathering steel.
Quenched-and-tempered alloy-steel heavy hex structural bolts, 1/2 in through 1-1/2 in diameter, 150 ksi minimum tensile, for high-strength structural steel connections. ASTM A490 was withdrawn in 2016 and replaced by ASTM F3125 Grade A490; content carried forward. Type 1 is alloy steel; Type 3 is weathering steel.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Type 1 | Medium carbon / alloy steel, Q&T | Standard 150 ksi heavy hex structural bolt |
| Type 3 | Weathering (atmospheric corrosion resistant) steel, Q&T | For exposed weathering-steel structures |
Minimum mechanical requirements per ASTM A490/A490M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Type 1, 1/2-1-1/2 in | 150-173 (1040-1200) | 130 (895) | 14 | 33-39 HRC; RA 40% min |
| Type 3, 1/2-1-1/2 in | 150-173 (1040-1200) | 130 (895) | 14 | 33-39 HRC; RA 40% min |
| Grade | Key Composition, % |
|---|---|
| Type 1 | Medium carbon alloy steel, quenched and tempered (C, Cr, Mo, B grade dependent) |
| Type 3 | Weathering steel with Cu, Cr, Ni, Si for atmospheric corrosion resistance |
Superseded by ASTM F3125/F3125M Grade A490 (metric A490M). No hot-dip galvanizing permitted (hydrogen embrittlement risk). Use with A563 DH / DH3 nuts and F436 washers.
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 A490/A490M 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.
Quenched-and-tempered alloy-steel heavy hex structural bolts, 1/2 in through 1-1/2 in diameter, 150 ksi minimum tensile, for high-strength structural steel connections. ASTM A490 was withdrawn in 2016 and replaced by ASTM F3125 Grade A490; content carried forward. Type 1 is alloy steel; Type 3 is weathering steel.
Ananka Fasteners supplies Type 1, Type 3 to ASTM A490/A490M. 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 A490/A490M 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 A490/A490M 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 A490/A490M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM A490/A490M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
