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 ASTM A350 LF2 Forged Steel Flange
| Element | Weight （%） |
| C | ≤ 0.30 |
| Mn | 0.60~1.35 |
| P | ≤ 0.035 |
| S | ≤ 0.040 |
| Si | 0.15~0.30 |
| Ni | ≤ 0.40 |
| Cr | ≤ 0.30 |
| Mo | ≤ 0.12 |
| Cu | ≤ 0.40 |
| Nb | ≤ 0.02 |
| V | ≤ 0.08 |
| N | / |
ASTM A350 LF2 Forged Steel Flange Pressure:
The ASTM A350 LF2 Forged Steel Flange in the process of production of pressure are: class 150,class 300,class 600,class 1500.
ASTM A350 LF2 Forged Steel Flange Size:
We produce different size according to customers’ requirements.The size of the ASTM A350 LF2 Forged Steel Flange are:1/2”-24” or DN15-DN600
ANSI/ASME B16.5 Socket Weld Flange Material:
In producing of ASTM A350 LF2 Forged Steel Flange main material in addition to ASTM A350 LF2,there are:
Carbon steel: ASTM A105, A181, ASTM A516 GR.60, GR.70, ASTM A694 F42, F46, F52, F56, F60, F65, F70, ST37, ST45.8, C22.8, S235, S235JRG2, P235GH, P245GH, P250GH, P265GH, P355GH, S355J2, 16MN, 20MN, Q235, 20#, CT20, SS400.
Alloy Steel: ASTM A350 LF2, CL1/CL2, ASTM A182 F5, F9, F11, F12, F22, F91.
Mechanical Properties of ASTM A350 LF2 Forged Steel Flange
|
Item
|
Value
|
|
Tensile Strength,
ksi [MPa]
|
70-95
[485–655]
|
|
Yield strength,
ksi [MPa], min.
|
36 [250] |
|
ELr,
min. %
|
22 |
|
ELs,
min. %
|
30 |
|
ELc,
min. %
|
48t + 15 |
|
Reduction of
Area, min. %
|
30 |
|
Hardness,
max. HBW
|
197 |
