A105/A350-LF2 Dual

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 .040 max .05 max0 .35 max
A350-LF2 Spec.
C Mn P S Si
.30 max 1.35 max 035 max .04 max0 .15/.30
A105/A350-LF2
C Mn P S Si
.20 1.24 .009 .021 .18
Characteristics
  • A105 and A350-LF2 are standard specifications for forged carbon steel piping components. A105 for ambient and higher-temperature service; A350-LF2 for low-temperature service with Charpy V-Notch impact energy testing. Components include flanges, various fittings and valves.
  • Some components may be machined from hot rolled or forged bar, suitably heat treated, up to and including NPS 4. See details in the ASTM designations
Typical Applications
  • A105 allows that for each .01% Carbon below .35, an increase of .06% Manganese is permitted over 1.05 to a maximum of 1.35. This explains the typical analysis above.
Typical Heat Treatment
  • Forging - Commence 1150℃ Max finish 925℃.
  • Annealing - 800℃ to 830℃ Surface cool
    • 870/ 915℃ air Cool
  • Normalizing - 830℃ to 850℃ water quench
  • Hardening - 850℃ to 870℃ oil quench
  • Tempering - 425℃ to 870℃ according to properties
ASTM A105 & ASTM A350-LF2 DUAL CERTIFIED Mechanical Properties
Spec A105 A350-LF2 A105/A350-LF2
Tensile Strength Min, psi 70,000 70,000-95,000 70,000-95,000
Tensile Strength Min, N/mm² 485 485-655 485-655
Yield Strength Min, psi 36,000 36,000 36,000
Yield Strength Min, N/mm² 250 250 250
Elongation (%) 22 22 22
Reduction of Area (%) 30 30 30
Hardness, maximum 187 15/12 ft-lbs 15/12 ft-lbs
CVN at -50℉ 20/16 joules 20/16 joules

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