Class 1 and Class 2 of ASTM A350/ ASME SA-350 grade LF2 have the same chemical composition and mechanical properties. Even the allowable stresses of Class 1 and Class 2 in ASME Codes are the same. The main characteristic that distinguishes Class 1 from Class 2 is its minimum applicable temperature. ASTM A350 Grade LF2 Class 1 is a standard material specification for carbon and low alloy steel forgings, requiring notch toughness testing for piping components. This includes forged flanges, fittings, valves and similar forged and machined parts.
A350 LF2 Valves, LF2 Ball Valve, Gate, Globe, Check Valves
ASTM A350 (ASME SA350) is the standard specification for carbon steel and low alloy steel forged flanges and flanged fittings for low temperature services. Common use grade is ASTM A350 LF2 Class 1, corresponding material for piping in ASTM A333 Grade 6 and pipe fittings in ASTM A420 WPL6. ASTM A350 & ASME SA350 covers several grades of carbon and low-alloy steel forged or ring-rolled flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. They are made to specified dimensions, or to dimensional standards, such as the ASME and API specifications. The ASTM A350 LF2 is a forged carbon/ low-alloy steel grade for forged flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. There are two Classes for the LF2 steels: Class 1 and Class 2. A 350 Grade LF2 ASTM A350 (USA) Standards ASTM A350 Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for. By ASTM A350 Class 1 HB: after heat treatment Yield Strength: > 250 MPa Tensile Strength: 485 - 655 MPa Elongation: > 22 % Hardness HB: < 197
Carbon Steel Fittings and Flanges ASTM A350 LF2 Flange I MS Seamless
ASTM A350 Grade LF2 Class 1 1. Chemical Composition C Si Mn P S Cr Mo Ni Cu Nb V Cr+Mo ≤ 0.3 0.15-0.3 0.6-1.35 ≤ 0.035 ≤0.04 ≤ 0.3 ≤ 0.12 ≤ 0.4 ≤ 0.4 ≤ 0.02 ≤ 0.08 ≤ 0.32. 1 Normalizing 860-920 2 Annealing - 3 Quenching 890-960 4 Tempering Min 590 5 Hot Work 900-1200 4. Applicable Standards EU EN USA UNS Japan JIS France. ASTM A350 covers several grades and classes: Grade LF1, Grade LF2, Grade LF3, Grade LF5, Grade LF6, Grade LF9, Grade LF787; and Class 1, Class 2, Class 3. All the forgings supplied by Metals-Piping will be ultrasonically tested. Long welding neck flange (LWN), 2″ 900#, ASTM A350 LF3 CL1. 1. ASTM A350 Chemical Composition Requirements *1. ASTM A350 Grade LF2 Class 1 Heat-Treated Want to keep this datasheet? Save it now in your required format Download as .XLSX Download as .PDF Related Standards This material data has been provided by ASTM. "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. ASTM A105 & ASTM A350-LF2 DUAL CERTIFIED a Special Quality Fine Grain Carbon-Manganese Steel for Piping Components: Typical Analysis: A105 Spec. C: Mn: P: S: Si.35 max.60/1.05. A105 for ambient and higher-temperature service; A350-LF2 for low-temperature service with Charpy V-Notch impact energy testing. Components include flanges, various.
ASTM A350 LF2 Flanges and Material ASME SA 350 LF2 Cl1 Pipe Flanges
Class : 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS: ASTM A350 LF2 LTCS Forged Fittings Manufacturing Standards : ASTM A350 LF2 - ASME SA350 LF2: Standard Specification for Wrought Austenitic Carbon Steel Piping Fittings:. Carbon Steel ASTM A350 LF2 Unions: Sizes 1/8″- 4″. The ASTM A350 LF2 is a forged carbon/ low-alloy steel grade for forged flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. There are two Classes for the LF2 steels: Class 1 and Class 2. CHEMICAL COMPOSITION OF A350 LF2 MECHANICAL PROPERTIES OF A350 LF2
Grade LF2 under specification ASTM A350, is segregated further into Class 1 and Class 2. Both classes 1 and 2 of the SA350 LF2 WN Flange have the same chemical composition, mechanical properties and allowable stresses. ASTM A350 LF2 Flanges A350 Gr. LF2 CL.1 Blind Flange Carbon Steel A350 Lf2 Flanges Table of Contents Pipe flanges made from ASTM A350 Gr. LF2 steel are usually manufactured in accordance with ASME B16.5 or ASME B16.47. It is a typical Group 1.1 material. The pressure-temperature ratings for ASTM A350 LF2 indicate maximum allowable working pressures in bar or psi units at the temperatures in °C or °F units. For intermediate temperatures, the values can be obtained by linear interpolation.
ASTM A350 LF2 (ASME SA350) Flanges for Low Temperature OCTAL
The main feature that distinguishes ASTM A350 Lf2 Class 1 Pipe Fittings from grade LF2 Class 2 is its minimum applicable temperature. While the minimum applicable temperature is about -50°F for fitting that belong to LF2 Class 1, for LF2 Class 2 fitting, the minimum applicable temperature is -0°F. The A350 LF2 Class 1 Flange is the most used with class 2 being used in specific applications. The flanges can also be heat treated for hardening. The heat treatment methods are normalizing and tempering. The A350 LF2 Blind Flange is a type of flange that is fitted on to the ends of pipes to close a pipe line completely. These could be bolted for easy removal at maintenance or be welded.
