At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM A541/A541M. Standard specification for quenched-and-tempered carbon and alloy steel forgings for pressure vessel components (shells, heads, flanges, tubesheets). Bolting and pressure parts machined from these forgings. (Withdrawn by ASTM in 2025; still widely referenced.)
Standard specification for quenched-and-tempered carbon and alloy steel forgings for pressure vessel components (shells, heads, flanges, tubesheets). Bolting and pressure parts machined from these forgings. (Withdrawn by ASTM in 2025; still widely referenced.)
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Grade 1 / 1A | K03506 | C-Mn-Si, Q&T |
| Grade 2 Cl1/Cl2 | K12765 | Mn-Mo / Mn-Mo-Ni |
| Grade 3 Cl2 | K21590 | 1.75-2.75Ni-Cr-Mo |
| Grade 22 Cl4/Cl5 | K21590 | 2.25Cr-1Mo |
| Grade 3V / 22V | K31835 / K31390 | Cr-Mo-V (hydrogen service) |
Minimum mechanical requirements per ASTM A541/A541M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Grade 1 / 1A | 70-95 ksi (485-655 MPa) | 36 ksi (250 MPa) | 20 | – |
| Grade 2 Cl1 | 80-105 ksi (550-725 MPa) | 50 ksi (345 MPa) | 18 | – |
| Grade 2 Cl2 / 3 Cl2 | 90-115 ksi (620-795 MPa) | 65 ksi (450 MPa) | 16 | – |
| Grade 22 Cl4 | 105-130 ksi (725-895 MPa) | 85 ksi (585 MPa) | 16 | – |
| Grade 22 Cl5 | 115-140 ksi (795-965 MPa) | 100 ksi (690 MPa) | 15 | – |
| Grade 3V / 22V | 85-110 ksi (585-760 MPa) | 55-60 ksi (380-415 MPa) | 18 | – |
| Grade | Key Composition, % |
|---|---|
| Grade 1 | C 0.35 max, Mn 0.70-1.35, Si 0.15-0.35, Mo 0.06 max |
| Grade 2 | C 0.27 max, Mn 0.50-1.00, Mo 0.45-0.60, Ni 0.40-0.80 |
| Grade 22 | Cr 2.00-2.50, Mo 0.90-1.10, C 0.15 max |
| Grade 22V | Cr 2.00-2.50, Mo 0.90-1.10, V 0.25-0.35, C 0.11-0.15 |
ASME SA-541; grade chemistries align with A542/A387 (Cr-Mo) and A508 (Mn-Mo-Ni) forgings; 22V/3V match A832/A542 vanadium-modified hydrogen-service steels.
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 A541/A541M 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 for quenched-and-tempered carbon and alloy steel forgings for pressure vessel components (shells, heads, flanges, tubesheets). Bolting and pressure parts machined from these forgings. (Withdrawn by ASTM in 2025; still widely referenced.)
Ananka Fasteners supplies Grade 1 / 1A, Grade 2 Cl1/Cl2, Grade 3 Cl2, Grade 22 Cl4/Cl5, Grade 3V / 22V to ASTM A541/A541M. 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 A541/A541M 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 A541/A541M 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 A541/A541M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM A541/A541M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
