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ASTM A350 LF2 Class 1 Alloy Steel Weld Neck Flange Low Temperature Forged Flange

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ASTM A350 LF2 Class 1 Alloy Steel Weld Neck Flange Low Temperature Forged Flange

Brand Name : YUHONG

Model Number : ASTM A182 LF2 Alloy Steel WNRF Flange

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 1PC

Payment Terms : L/C,T/T

Delivery Time : 7 DAYS

Packaging Details : Plywood Case /Pallet

Specification : ASTM A350, ASME SA350

Standard : B16.5, B16.47 series A, series B

Material : Alloy LF2 class 1

Size : 1/2" to 24" or larger

Thickness : sch5S to sch.XXS

Class : 150#, 300#, 400#, 600#, 900#, 1500#

Surface : FF,RF, RTJ

Type : Welding Neck,Slip-On,Blind, Threaded,Socket Weld,Lap Joint,Orifice Flange

Packaging : Plywood Case /Pallet

High Light : ASTM A350 LF2 Alloy Steel Weld Neck Flange, ASME B16.5 Forged WNRF Flange

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ANSI / ASME B16.5 Forged Flange ASTM A350 Grade LF2 Alloy Steel Weld Neck Flange

The ASTM A350 LF2 flange is designed to maintain toughness and impact resistance which is suitable for low-temperature applications down to -50°F (-45°C) and also for higher temperatures. They are commonly used in oil and gas pipelines, chemical processing, and other industries where durability and resistance to low temperatures are essential.

Key Advantages of ASTM A350 LF2 Alloy Steel Weld Neck Flange

  • Low-Temperature Toughness: Reliable performance in cryogenic conditions.

  • High Strength: Suitable for high-pressure systems.

  • Corrosion Resistance: Optional treatments or coatings for harsh environments.

Differentiation from Similar Grades:

  • LF2 vs. LF1: Higher manganese and optional nickel in LF2 improve low-temperature performance.

  • LF2 vs. A105: A105 is for ambient temperatures, while LF2 is specialized for low temps.

Chemical Composition of ASTM A350 LF2 Alloy Steel Weld Neck Flange

Grade C% Mn% Si% S% P% Cr% Ni%
LF1 0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
LF2 0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
LF3 0.20 max 0.90 .20/.35 .040 max .035 max 0.30 max 3.3/3.7

Mechanical Properties of ASTM A350 LF2 Alloy Steel Weld Neck Flange

PROPERTIES Imperial
TS Min psi (Mpa) 70,000 (485)
YS Min psi (Mpa) 36,000 (250)
EL (2″ Min) 22%
RA Min 30%
Hardness, Bhn Max 197
-50ºF Charpy Min Impact
Energy F t/Lb (J):-
Set of 3 Specimen* 15 (20)
For One Specimen 12 (16)

Available Flanges Grades

Stainless Steel F304, F304L, F304H, F316, F316L, F316Ti, F310, F310S, F321, F321H, F317, F317L, F347, F347H, F904L
Duplex Steel UNS S31803, 2205, S31254 (254SMO),UNS S32750, UNS S32760
Carbon Steel ASTM A105, A105N
Alloy Steel F1, F11, F22, F5, F9, F9, F91, F92,
Nickel Alloy Monel 400 & K500,

Inconel 600, 601, 617, 625, 690, 718, X-750.

Incolloy 800, 800H, 800HT, 825, 925.

Hastelloy C22, C4, C276, S, C2000, G-30, G-35, X, N, B, B-2, B-3

Manufacturing and Processing:

  • Forging Process: Provides superior grain structure alignment, enhancing strength and fatigue resistance compared to casting.

  • Heat Treatment: Typically normalized or quenched and tempered to achieve desired mechanical properties and stress relief.

Applications:

  • Oil and Gas Industry: For piping systems in low-temperature environments, particularly in production and transport applications.
  • Chemical Processing: Suitable for applications that involve low-temperature corrosive chemicals.
  • Cryogenic Applications: Used in processes involving gaseous or liquid hydrocarbons at low temperatures, such as liquefied natural gas (LNG) facilities.

ASTM A350 LF2 Class 1 Alloy Steel Weld Neck Flange Low Temperature Forged Flange


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