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| Place of Origin | China |
| Brand Name | Kasugai |
| Model Number | ASTM A350 LF2 |
| Document | Product Brochure PDF |
ASTM A350 LF2 Flange for Low Temperature carbon Steel
A350 LF2 flanges are manufactured in accordance with ASTM A350 standard which specifies low-temperature carbon steel forgings for piping components such as flanges, fittings, valves and other similar parts. A350 LF2 flanges are commonly used in cryogenic applications where low temperature materials are required to ensure efficient and reliable operations.
ASTM A350 (ASME SA350) is the standard specification for carbon steel and low alloy steel forged flanges and flanged fittings for low temperature services. ASTM A350 LF2 Class 1 is commonly used grade with yield strength minimum 240 Mpa, and tensile strength in 480 Mpa to 655 Mpa, impact test temperature at -45℃.
Product Information
| Product Name | ASTM A350 LF2 Flange |
| Size Range | 1/2’ to 24” (ASME B16.5)and up to 60” (ASME B16.47) |
| Pressure Class | 150, 300, 400, 600, 900, 1500, 2500 |
| Standards | ASTM 350 / ASME SA350 |
| Face Type | Weld Neck (WN) Blind (BL) Slip On (SO) Socket Weld (SW) Lap Joint (LJ) Threaded (TR) |
| Thickness | Sch10 Sch40 Sch160 Comply with ASME B16.9 |
| Origin | China |
| Manufacturing Standards | ASME B16.5 ASMEB16.47 A B |
ASTM A350 Flange Materials Chemical Composition
| Grade | Composition, % | ||||||
| Grade LF1 | Grade LF2 | Grade LF3 | Grade LF5 | Grade LF6 | Grade LF9 | Grade LF787 | |
| C (max) | 0.30 | 0.30 | 0.20 | 0.20-0.35 | 0.22 | 0.20 | 0.70 |
| Mn | 0.60-1.35 | 0.60-1.35 | 0.90max | 0.60-1.35 | 1.15-1.50 | 0.40-1.06 | 0.40-0.70 |
| P | 0.035 | 0.035 | 0.035 | 0.035 | 0.025 | 0.035 | 0.025 |
| S (max) | 0.04 | 0.04 | 0.04 | 0.04 | 0.025 | 0.04 | 0.025 |
| SiA | 0.15-0.30 | 0.15-0.30 | 0.20-0.35 | 0.20-0.35 | 0.15-0.30 | ﹍ | 0.40 max |
| Ni | 0.40 maxB | 0.40 maxB | 3.30-3.70 | 1.0-2.0 | 0.40 maxB | 1.60-2.24 | 0.70-1.0 |
| Cr | 0.30 maxB, C | 0.30 maxB, C | 0.30 maxC | 0.30 maxC | 0.30 maxB, C | 0.30 maxC | 0.60-0.90 |
| Mo | 0.12 maxB, C | 0.12 maxB, C | 0.12 maxC | 0.12 maxC | 0.12 maxB, C | 0.12 maxC | 0.15-0.25 |
| Cu | 0.40 maxB | 0.40 maxB | 0.40 max | 0.40 max | 0.40 maxB | 0.75-1.25 | 1.0-1.3 |
| Cb | 0.02 maxD | 0.02 maxD | 0.02 max | 0.02 max | 0.02 max | 0.02 max | 0.02 min |
| V | 0.08 max | 0.08 max | 0.03 max | 0.03 max | 0.04-0.11 | 0.03 max | 0.03 max |
| N | ﹍ | ﹍ | ﹍ | ﹍ | 0.01-0.03 | ﹍ | ﹍ |
A When vacuum carbon-deoxidation is required by Supplementary Requirement S4, the Silicon content shall be o.12%
B The sum of copper, Nickel, chromium, vanadium and molybdenum shall not exceed 1.00% on heat analysis
C The sum of chromium and molybdenum shall not exceed 0.32% on heat analysis.
D By agreement, the limit for columbium may be increased up to 0.05% on heat analysis and 0.06% on product analysis.
ASTM A350 Mechanical Properties
| Grade/Class | Tensile Strength | Yield Strength min | Elongation, min | Hardness, max | ||
| ksi | MPa | ksi | MPa | % | HBW | |
| LFI CL1 | 60-85 | 415-585 | 30 | 205 | 25 | 197 |
| LF5 CL1 | 60-85 | 415-585 | 30 | 205 | 25 | 197 |
| LF2 CL1 | 70-95 | 485-655 | 36 | 250 | 22 | 197 |
| LF2 CL2 | 70-95 | 485-655 | 36 | 250 | 22 | 197 |
| LF3 CL1 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
| LF3 CL2 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
| LF5 CL2 | 70-95 | 485-655 | 37.5 | 260 | 22 | 197 |
| LF6 CL1 | 66-91 | 455-630 | 52 | 360 | 22 | 197 |
| LF6 CL2 | 75-100 | 515-690 | 60 | 415 | 20 | 197 |
| LF6 CL3 | 75-100 | 515-690 | 60 | 415 | 20 | 197 |
| LF9 | 63-88 | 435-605 | 46 | 315 | 25 | 197 |
| LF787 CL2 | 65-85 | 450-585 | 55 | 380 | 20 | 197 |
| LF787 CL3 | 75-95 | 515-655 | 65 | 450 | 20 | 197 |
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