C&N industrial Group, pipe, fitting and flanges manufacturers,fbe epoxy and pe coating for pipeline since 1991,with brand C&N huitong ,C&N hongcheng.
ASTM A350 LF2 CL1 HEX NIPPLE
ASTM A350 LF2 CL1 Hex Nipple is a double-ended externally threaded pipe fitting manufactured through hot forging process. It features a hexagonal central body with precision-machined external threads on both ends, designed to connect with internally threaded components such as valves, flanges, or other pipe fittings.
The ASTM A350 LF2 CL1 Hex Nipple is a precision forged pipe fitting specifically designed for low-temperature, high-pressure piping systems. Its unique hexagonal structure ensures stability under demanding operating conditions. It is widely used in liquefied natural gas (LNG) transmission systems and pipeline connections for offshore oil and gas platforms, providing zero-leakage assurance for hazardous media.
A350 LF2 Equivalent Material
| Types | UNS | Specification | Astm A350 Lf2 Equivalent European | DIN | DINW.No |
| C-Mn-Fe | K03011 | A350-LF2 | A352-LCB A352-LCC | TSTE 355 DIN 18103 | 1.0566 |
| C-Si | K03504 | A105 | A216-WCB | C22.8 DIN 17243 | 1.0460 |
| 3.1/2Ni | K32025 | A350-LF3 | A352-LC3 | 10Ni14 | 1.5637 |
The ASTM A350 LF2 CL1 Hex Nipple strictly adheres to the ASTM A350 standard. Its chemical composition, with carbon content (0.21-0.30%) and manganese (0.60-1.35%), significantly enhances material hardenability after undergoing tempering, normalizing, quenching, and precipitation heat treatment. The upper limits of sulfur and phosphorus impurities are strictly controlled within 0.040%, substantially reducing the tendency for welding hot cracking. The addition of trace amounts of nickel (≤0.40%) and chromium (≤0.30%) further optimizes crystal structure stability in low-temperature environments, enabling the product to resist brittle fracture even during long-term exposure to cryogenic soaking conditions.
SA350 Gr Lf2 Forged Fittings Manufacturing Standards:
| ASTM A350 LF2 – ASME SA350 LF2 | Standard Specification for Wrought Austenitic Carbon Steel Piping Fittings |
| ASME B16.11 | Socket Welding and Threaded Forged Fittings |
| MSS SP-43 | Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications |
| MSS SP-95 | Swage(d) Nipples and Bull Plugs |
| BS3799 | Specification for Steel pipe fittings, screwed and Socket-welding for the petroleum industry |
ASTM A350 LF2 Chemical Composition
| Molybdenum 0.12 max Sulfur 0.040 max Copper 0.40 max | Carbon 0.30 max Silicon 0.15-0.30 Columbium 0.02 max | Manganese 0.60-1.35 Chromium 0.30 max Vanadium 0.08 max | Phosphorus 0.035 max Nickel 0.40 max |
The ASTM A350 LF2 CL1 Hex Nipple possesses excellent physical properties, with a tensile strength of 485–655 MPa and a yield strength of ≥250 MPa, enabling it to support high-pressure operations. Furthermore, benefiting from its unique structure and chemical composition, the ASTM A350 LF2 CL1 Hex Nipple maintains high impact toughness at temperatures as low as -46℃, preventing low-temperature brittle fracture. Compared to ordinary stainless steel, it reduces wear under demanding conditions, maintains stability, extends service life, and significantly lowers pipeline construction and maintenance costs.
ASTM A350 LF2 Mechanical Properties
| Property | Value (min) |
|---|---|
| Set of 3 Specimen | 15 (20) |
| Tensile Strength psi (Mpa) | 70,000 (485) |
| Elongation | 22% |
| Yield Strength psi (Mpa) | 36,000 (250) |
| For One Specimen | 12 |
| Hardness | 197 (max) |
| Property | Value |
|---|---|
| Reduction of Area | > 30 % |
| Impact Energy (KV -50°F [-45°C]) | > 16 J |
| Class 1 HB | After HT |
When you are concerned about ensuring pipeline stability in low-temperature, high-pressure environments, the ASTM A350 LF2 CL1 Hex Nipple is your optimal solution. At C&N Group, we provide high-quality ASTM A350 LF2 CL1 pipe fittings in various specifications. We can also customize products according to required specifications to meet your demands. If needed, please contact us.
