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ASME SA350 LF2 Class 1 Alloy Steel Forged Flange B16.5

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ASME SA350 LF2 Class 1 Alloy Steel Forged Flange B16.5

Brand Name : YUHONG

Model Number : ASME SA350 LF2 Class 1

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015

Place of Origin : CHINA

MOQ : 1PCS

Price : Negotiable

Payment Terms : L/C,T/T

Delivery Time : 7DAYS

Packaging Details : Bundle with plastic Cap/Wooden Case

Standard : ASTM A350/ASME SA350

Material : LF2 Class 1

Flange Type : WN, SO, BL, SW, SPECTACLE, LJP, ORINFICE

Packing : Bundle with plastic Cap/Wooden Case

Application : Oil&Gas/Water Treatment/Pipeline/Cooling System

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ASME SA350 LF2 Class 1 Alloy Steel Forged Flange B16.5 For Low Temperature
Product Specifications
Attribute Value
Standard ASTM A350/ASME SA350
Material LF2 Class 1
Flange Type WN, SO, BL, SW, SPECTACLE, LJP, ORINFICE
Packing Bundle with plastic Cap/Wooden Case
Application Oil & Gas/Water Treatment/Pipeline/Cooling System
Product Overview
ASME SA350 / ASTM A350 is a standard specification for carbon steel and low-alloy steel forgings used for notch toughness testing of pipeline components. This specification covers forged or ring rolled flanges, forged fittings, and valves made of carbon steel and low-alloy steel, particularly suitable for low-temperature environments such as LNG facilities, cold storage, and polar engineering.
Key Advantages
  • Excellent low-temperature toughness (-46°C impact testing)
  • Superior welding performance due to low carbon content (≤ 0.45)
  • Enhanced corrosion resistance from trace alloying elements (nickel)
Chemical Composition
Grade C MN P S SI CR NI MO CU CO VA
LF1 0.30 0.60-1.35 0.035 0.04 0.15-0.30 0.30 0.40 0.12 0.40 0.02 0.08
LF2 0.30 0.60-1.35 0.035 0.04 0.15-0.30 0.30 0.40 0.12 0.40 0.02 0.08
LF3 0.20 0.90 0.035 0.04 0.20-0.35 0.30 3.3-3.7 0.12 0.40 0.02 0.03
Material Comparison
  • VS SA350 LF3: LF2 Class 1 offers cost-effective performance for temperatures above -46°C, while LF3 is for more demanding cryogenic environments (-101°C).
  • VS Austenitic stainless steels (304/316L): LF2 provides more economical low-temperature toughness when corrosion resistance isn't required.
  • VS ASTM A694 F52/F60/F65/F70: LF2 offers superior toughness at low temperatures compared to these high-strength alternatives.
Tensile Properties at Room Temperature
Grade Tensile Strength, min, ksi [MPa] Yield Strength, min, ksi [MPa]
LF1 60-85 [415-585] 30 [205]
LF2 70-95 [485-655] 36 [250]
LF3 70-95 [485-655] 37.5 [260]
Manufacturing Requirements
  • Forging process: Improves material density and eliminates casting defects
  • Heat treatment: Normalizing or normalizing+tempering to refine grain size
  • Non-destructive testing: UT or MT to ensure no cracks or inclusions
Applications
  • LNG Industry: Storage tanks, transportation pipelines, regasification terminals
  • Petrochemical: Low-temperature separation units, ethylene cracking units
  • Marine Engineering: Polar ships, offshore oil platforms
  • Energy: Nuclear power cooling systems, natural gas power plants
  • Chemical Processing: Liquid ammonia storage, specialty gas systems
ASME SA350 LF2 Class 1 Alloy Steel Forged Flange B16.5

Product Tags:

ASTM A350 steel forged flange

      

ASME SA350 LF2 steel forged flange

      

Low Temperature steel forged flange

      
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