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ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems

ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems

  • ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems
  • ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems
  • ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems
  • ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems
ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems
Product Details:
Place of Origin: CHINA
Brand Name: YUHONG
Certification: ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number: ASME SA350 LF2 Class 1
Payment & Shipping Terms:
Minimum Order Quantity: 500KGS
Price: Negotiable
Packaging Details: Ply-wooden Case /Iron Case
Delivery Time: 15-20 Days
Payment Terms: L/C, T/T
Supply Ability: 800 Tons/ Month
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Detailed Product Description
​Standard​: ASME SA350 Grade​: LF2 Class 1
Material Type​: Forged Carbon Steel Application​: Low Temperature Piping Systems
Face Type​: Raised Face (RF) / Ring Type Joint (RTJ) Size Range​: Custom Size
Highlight:

ASME SA350 LF2 forged flange

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carbon steel nozzle cover flange

,

piping system forged steel flange

ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems

 

​​YUHONG GROUP​​ specializes in manufacturing ​​ASME-certified forged steel flanges​​ for critical low-temperature applications. Our ​​ASTM A350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flanges​​ are engineered to deliver reliable performance in cryogenic piping systems operating as low as ​​-46°C.

​​Chemical Composition of ASTM A350 LF2 (UNS K03011) Forged Steel Flange​

 

​Element​​ ​​Requirement (%)​​ ​​Notes​​
​​Carbon (C)​​ ≤0.30 Controlled for weldability
​​Manganese (Mn)​​ 0.60-1.35 Enhances strength and toughness
​​Phosphorus (P)​​ ≤0.035 Minimizes brittleness
​​Sulfur (S)​​ ≤0.040 Improves machinability
​​Silicon (Si)​​ 0.15-0.30 Deoxidizer and strength enhancer
​​Nickel (Ni)​​ ≤0.40 Part of the alloy sum restriction
​​Chromium (Cr)​​ ≤0.30 Part of the Cr+Mo sum restriction
​​Molybdenum (Mo)​​ ≤0.12 Part of the Cr+Mo sum restriction
​​Copper (Cu)​​ ≤0.40 Part of the alloy sum restriction
​​Columbium (Cb)​​ ≤0.02 Controlled for weldability
​​Vanadium (V)​​ ≤0.08 Grain refinement control

Tensile Properties for ASTM A350 LF2 Class 1/2

 

​​Property​​ ​​Requirement for LF2 Class 1 & 2​​ ​​Notes​​
​​Tensile strength​​ 70-95 ksi [485-655 MPa] Range applies to both Class 1 & 2
​​Yield strength, min​​ 36 ksi [250 MPa] By a 0.2% offset or a 0.5% extension method
​​Elongation (standard round specimen)​​ 22% min in 4D gauge length For full-section testing
​​Elongation (strip specimen)​​ 30% min in 2 in. (50 mm) For thickness ≥7.94 mm
​​Reduction of area, min​​ 30% Applies to round specimens only

Impact Test Temperature for ASME SA350

 

​Grade​​ ​​Test Temperature, °F [°C]​​
LF1 -20 [-29]
LF2, Class 1 -50 [-46]
LF2, Class 2 0 [-18]
LF3, Classes 1 and 2 -150 [-101]
LF5, Classes 1 and 2 -75 [-59]
LF6, Classes 1 and 2 -60 [-51]
LF6, Class 3 0 [-18]
LF9 -100 [-73]
LF787, Class 2 -75 [-59]
LF787, Class 3 -100 [-73]

​​Key Advantages of ASTM A350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange​

​

​​1. Certified Low-Temperature Performance​​

​​Guaranteed impact toughness​​ at -46°C (-50°F) per ASTM A350 Table 4

​​Class 1 designation​​ ensures superior performance in cryogenic service compared to Class 2

​​2. Optimized Material Composition​​

​​Controlled carbon content (≤0.30%)​​ enables excellent weldability without preheat requirements

​​Manganese content (0.60-1.35%)​​ provides an optimal balance of strength and toughness

​​3. Manufacturing Reliability​​

​​Forged construction​​ eliminates defects and ensures structural integrity under pressure

​​Full traceability​​ with heat number marking and EN 10204 3.1 certification available

​​4. Quality Verification​​

​​100% non-destructive testing​​ (PT/MT/UT) available upon request

​​Third-party inspection​​ acceptance (SGS/BV/DNV)

ASME SA350 LF2 Class 1 Forged Carbon Steel Nozzle Cover Flange for Piping Systems 0

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forged steel flanges,

carbon steel flanges,

stainless steel flanges

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