ASTM A350 LF1 LF2 LF3 LF5 Forged Self Reinforce Nozzles For Pressure Vessel
Brand Name:YUHONG
Certification:ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015
Model Number:ASTM A350 CL.2
Minimum Order Quantity:500KGS
Delivery Time:10-90 Days
Payment Terms:L/C, T/T
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ASTM A350 LF2 Forged Self Reinforce Nozzles For Pressure Vessel
ASTM A350 LF2 is a low-temperature carbon steel forging material that requires mandatory notch toughness testing. It is a specific grade within the ASTM A350 standard. Its excellent resistance to brittle fracture in low-temperature environments makes it widely used in the manufacture of pressure-bearing piping components such as flanges, valves, and fittings. It is particularly suitable for applications requiring low temperatures or high toughness, such as liquefied natural gas (LNG) and petrochemical cold zones.
The ASTM A350 LF2 Self-Reinforced Nozzle is a nozzle made of LF2-grade forged steel with -46°C impact toughness. Its inherently thickened wall meets the ASME specification for opening reinforcement, eliminating the need for external reinforcement rings. This design is particularly suitable for applications requiring high low-temperature toughness and structural simplicity. Design and manufacturing must strictly adhere to the ASME BPVC specification.
Chemical Composition
| Element | Composition, w.t % Grades | ||||||
| LF1 | LF2 | LF3 | LF5 | LF6 | LF9 | LF787 | |
| Carbon max | 0.30 | 0.30 | 0.20 | 0.30 | 0.22 | 0.20 | 0.07 |
| Manganese | 0.60-1.35 | 0.60-1.35 | 0.90 max | 0.60-1.35 | 1.15-1.50 | 0.40-1.06 | 0.40-0.70 |
| Phosphorus max | 0.035 | 0.035 | 0.035 | 0.035 | 0.025 | 0.035 | 0.025 |
| Sulfur max | 0.040 | 0.040 | 0.040 | 0.040 | 0.025 | 0.040 | 0.025 |
| Silicon(a) | 0.15-0.30 | 0.15-0.30 | 0.20-0.35 | 0.20-0.35 | 0.15-0.30 | ... | 0.40 max |
| Nickel | 0.40 max(b) | 0.40 max(b) | 3.30-3.70 max | 1.00-2.00 max | 0.40 max(b) | 1.60-2.24 | 0.70-1.00 |
| Chromium | 0.30 max(b)(c) | 0.30 max(b)(c) | 0.30 max(c) | 0.30 max(c) | 0.30 max(b)(c) | 0.30 max(c) | 0.60-0.90 |
| Molybdenum | 0.12 max(b)(c) | 0.12 max(b)(c) | 0.12 max(c) | 0.12 max(c) | 0.12 max(b)(c) | 0.12 max(c) | 0.15-0.25 |
| Copper | 0.40 max(b) | 0.40 max(b) | 0.40 max | 0.40 max | 0.40 max(b) | 0.75-1.25 | 1.00-1.30 |
| Niobium(e) | 0.02 max(d) | 0.02 max(d) | 0.02 max | 0.02 max | 0.02 max | 0.02 max | -0.02 min |
| Vanadium | 0.08 max | 0.08 max | 0.03 max | 0.03 max | 0.04-0.11 | 0.03 max | 0.03 max |
| Nitrogen | ... | ... | ... | ... | 0.01-0.030 | ... | ... |
Mechanical Requirements
| Grade Class | Tensile Strength | Yield Strength min | Elongation min | Hardness max | ||
| ksi | MPa | ksi | MPa | % | HBW | |
| LF1 CL1 | 60-85 | 415-585 | 30 | 205 | 25 | 197 |
| LF2 CL1 | 70-95 | 485-655 | 36 | 250 | 22 | 197 |
| LF2 CL2 | 70-95 | 485-655 | 36 | 250 | 22 | 197 |
| LF3 CL1 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
| LF3 CL2 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
| LF5 CL1 | 60-85 | 415-585 | 30 | 205 | 25 | 197 |
| LF5 CL2 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
| LF6 CL1 | 66-91 | 455-630 | 52 | 360 | 22 | 197 |
| LF6 CL2 | 75-100 | 515-690 | 60 | 415 | 20 | 197 |
| LF6 CL3 | 75-100 | 515-690 | 60 | 415 | 20 | 197 |
| LF9 | 63-88 | 435-605 | 46 | 315 | 25 | 197 |
| LF787 CL2 | 65-85 | 450-585 | 55 | 380 | 20 | 197 |
| LF787 CL3 | 75-95 | 515-655 | 65 | 450 | 20 | 197 |
Charpy V-Notch Impact Properties
| Charpy V-Notch Energy Requirements for 10x10 mm Specimens | ||||
| Grade Class | A | B | ||
| ft·lbf | J | ft·lbf | J | |
| LF1 LF9 | 13 | 18 | 10 | 14 |
| LF2 CL1 | 15 | 20 | 12 | 16 |
| LF3 CL1 | 15 | 20 | 12 | 16 |
| LF5 CL1 CL2 | 15 | 20 | 12 | 16 |
| LF787 CL2 CL3 | 15 | 20 | 12 | 16 |
| LF6 CL1 | 15 | 20 | 12 | 16 |
| LF2 CL2 | 20 | 27 | 15 | 20 |
| LF3 CL2 | 20 | 27 | 15 | 20 |
| LF6 CL2 CL3 | 20 | 27 | 15 | 20 |
Frequently used ASTM Grades
| Material | Pipes | Fittings | Flanges | Valves | Bolts & Nuts |
| Carbon Steel | A106 Gr A | A234 Gr WPA | A105 | A216 Gr WCB | A193 Gr B7 A194 Gr 2H |
| A106 Gr B | A234 Gr WPB | A105 | A216 Gr WCB | ||
| A106 Gr C | A234 Gr WPC | A105 | A216 Gr WCB | ||
| Carbon Steel Alloy High-Temp | A335 Gr P1 | A234 Gr WP1 | A182 Gr F1 | A217 Gr WC1 | A193 Gr B7 A194 Gr 2H |
| A335 Gr P11 | A234 Gr WP11 | A182 Gr F11 | A217 Gr WC6 | ||
| A335 Gr P12 | A234 Gr WP12 | A182 Gr F12 | A217 Gr WC6 | ||
| A335 Gr P22 | A234 Gr WP22 | A182 Gr F22 | A217 Gr WC9 | ||
| A335 Gr P5 | A234 Gr WP5 | A182 Gr F5 | A217 Gr C5 | ||
| A335 Gr P9 | A234 Gr WP9 | A182 Gr F9 | A217 Gr C12 | ||
| Carbon Steel Alloy Low-Temp | A333 Gr 6 | A420 Gr WPL6 | A350 Gr LF2 | A352 Gr LCB | A320 Gr L7 A194 Gr 7 |
| A333 Gr 3 | A420 Gr WPL3 | A350 Gr LF3 | A352 Gr LC3 | ||
| Austenitic Stainless Steel | A312 Gr TP304 | A403 Gr WP304 | A182 Gr F304 | A182 Gr F304 | A193 Gr B8 A194 Gr 8 |
| A312 Gr TP316 | A403 Gr WP316 | A182 Gr F316 | A182 Gr F316 | ||
| A312 Gr TP321 | A403 Gr WP321 | A182 Gr F321 | A182 Gr F321 | ||
| A312 Gr TP347 | A403 Gr WP347 | A182 Gr F347 | A182 Gr F347 | ||
Application
Cryogenic Pressure Vessels and Systems
Liquefied Natural Gas (LNG) Facilities: Connections to Storage Tanks, Vaporizers, and Cryogenic Pumps.
Petrochemical Cryogenic Plants: Ethylene/Propylene Splitter, Cryogenic Storage Tanks, and Refrigeration Units.
Air Separation Units (ASUs): Liquid Oxygen/Liquid Nitrogen Storage Tanks and Pipeline Interfaces.
Harsh Environment Pressure Pipelines
Branch Connections for Oil and Gas Pipelines in Arctic and Cold Regions.
Valve and Instrument Interfaces for Refrigerant (e.g., Ammonia, CO₂) Circulation Systems.
High-Cleanliness and Corrosion-Sensitive Systems
Aseptic Connections for Pharmaceutical/Bioreactor and Food Processing Tanks.
Seawater Cooling Systems (LF2 requires an anti-corrosion coating).
ASTM A350 LF1 LF2 LF3 LF5 Forged Self Reinforce Nozzles For Pressure Vessel
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