At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM A350/A350M. Standard specification for carbon and low-alloy steel forgings (flanges, fittings, valves and parts) requiring notch-toughness testing for low-temperature piping service. Grades supplied with Charpy V-notch impact acceptance.
Standard specification for carbon and low-alloy steel forgings (flanges, fittings, valves and parts) requiring notch-toughness testing for low-temperature piping service. Grades supplied with Charpy V-notch impact acceptance.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| LF1 | K03009 | C-Mn, Class 1 |
| LF2 Cl1/Cl2 | K03011 | C-Mn-Si, most common |
| LF3 Cl1/Cl2 | K32025 | 3.5% Ni for low temp |
| LF5 Cl1/Cl2 | K12144 | C-Mn-Ni |
| LF6 Cl1/Cl2/Cl3 | K03013 | C-Mn-Nb (HSLA) |
| LF9 | K22036 | 1.6-2.24% Ni |
| LF787 Cl2/Cl3 | K12747 | Ni-Cu-Cr age-hardenable |
Minimum mechanical requirements per ASTM A350/A350M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| LF1 Cl1 | 60-85 ksi (415-585 MPa) | 30 ksi (205 MPa) | 25 | 197 HBW max |
| LF2 Cl1 | 70-95 ksi (485-655 MPa) | 36 ksi (250 MPa) | 22 | 197 HBW max |
| LF2 Cl2 | 70-95 ksi (485-655 MPa) | 36 ksi (250 MPa) | 22 | 197 HBW max |
| LF3 Cl1 | 70-95 ksi (485-655 MPa) | 37.5 ksi (260 MPa) | 22 | 197 HBW max |
| LF6 Cl1 | 66-91 ksi (455-630 MPa) | 52 ksi (360 MPa) | 22 | 197 HBW max |
| LF6 Cl2 | 75-100 ksi (515-690 MPa) | 60 ksi (415 MPa) | 20 | 197 HBW max |
| LF9 | 63-88 ksi (435-605 MPa) | 46 ksi (315 MPa) | 25 | 197 HBW max |
| Grade | Key Composition, % |
|---|---|
| LF2 | C 0.30 max, Mn 0.60-1.35, Si 0.15-0.30 |
| LF3 | C 0.20 max, Ni 3.30-3.70, Mn 0.90 max |
| LF6 | C 0.22 max, Mn 1.15-1.50, Nb 0.02-0.05 |
| LF9 | C 0.20 max, Ni 1.60-2.24, Mn 0.40-1.06 |
| LF787 | C 0.07 max, Ni 0.70-1.00, Cu 1.00-1.30, Cr 0.60-0.90 |
ASME SA-350; companion to A105 (non-impact-tested C steel flanges) and A182 low-alloy grades. LF2 broadly equivalent to A105 with added impact testing.
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 A350/A350M 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 carbon and low-alloy steel forgings (flanges, fittings, valves and parts) requiring notch-toughness testing for low-temperature piping service. Grades supplied with Charpy V-notch impact acceptance.
Ananka Fasteners supplies LF1, LF2 Cl1/Cl2, LF3 Cl1/Cl2, LF5 Cl1/Cl2, LF6 Cl1/Cl2/Cl3, LF9, LF787 Cl2/Cl3 to ASTM A350/A350M. 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 A350/A350M 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 A350/A350M 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 A350/A350M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM A350/A350M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
