Global Supply Line stocks and indents a large range of carbon steel valves in low temperature carbon steel such as forged ASTM A350 LF2 and it’s cast equivalent ASTM A352 LCB. Higher grades such as ASTM A352 LCC and Alloy (Nickel) based forged carbon steel A350-LF3 and it’s cast equivalent A352-LC3 are also available on an indent basis. LF2 and LCB low temperature carbon steels are suitable for continuous service down to -46ºC, up to 345ºC. However alloy - Nickel based carbon steels like LCB, LF3, etc. are rated to lower temperatures (see below table). For cryogenic service colder than these temperatures austenitic stainless grades such as 304, 316 (CF8, CF8M) are required.
|Steel Type||Grade (forging)||Grade (cast)||Composition||Min Temperature|
|Austenitic||A182, F316||A351 CF8M||18Cr, 8Ni, 2Mo||-196ºC|
|Nickel Based Steel||A350 LF3||A352 LC3||3 1/2Ni||-101ºC|
|Nickel Based Steel||NO EQUIV||A352 LC2||2 1/2Ni||-73ºC|
|Low Temp Carbon Steel||NO EQUIV||A352 LC1||0.5Mo||-59ºC|
|Low Temp Carbon Steel||A350 LF2||A352 LCB||Carbon Steel||-46ºC|
Other than temperature capabilities, LF2 and LCB are suitable for the same standard service applications as outlined as outlined at this website for A105 and WCB such as steam, hydrocarbons and general industrial services. The main difference between LF2/ LCB and A105/WCB is that LF2/LCB is Charpy impact tested at -46ºC. For this reason, Global Supply Line stocks LF2 and LCB valves dual conforming to A105 and WCB. We also stock A352-LCC triple conforming to WCB, LCB and WCC.
|Carbon Steel||CS||C-Si||K03504||A105||A216-WCB||C22.8 DIN 17243||1.0460||General non-corrosive service from -29ºC (-20ºF) to 425ºC (800ºF)|
|TSTE 355 DIN 18103||1.0566||General non-corrosive service from -46ºC (-50ºF) to 340ºC (650ºF), LF2 -46ºC ~ 425ºC|
|3.1/2Ni||K32025||A350-LF3||A352-LC3||10Ni14||1.5637||-101ºC (150ºF) to 340ºC (650ºF)|
|KEY PHYSICAL PROPERTIES||CAST||FORGED|
|0.30/0.35 C Max||A216-WCB||A105|
|0.25 C Max||A216-WCC|
|LOW TEMPERATURE STEEL|
|0.25/0.30 C Max||A352-LCB||A350-LF2|
|C-MN-Si (0.25 Max)||A352-LCC||A350-LF3|
|C-MN-Si-V (1.15~1.50 Mn)||A350-LF6|
|C 0.30 Max||TS Min psi (Mpa)||70,000 (485)|
|Mn 0.60 – 1.35||YS Min psi (Mpa)||36,000 (250)|
|Si 0.15 - 0.30||EL (2" Min)||22%|
|P 0.035 Max||RA Min||30%|
|S 0.040 Max||Hardness, Bhn||Max 197|
|Cr 0.30 Max||-50ºF Charpy||Min Impact|
|Ni 0.40 Max||Energy F t/Lb (J):-|
|Mo 0.12 Max||Set of 3 Specimen*||15 (20)|
|V 0.08 Max||For One Specimen||12 (16)|
|Cb 0.02 Max|
|Cu 0.04 Max|
|Pb 0.02 Max|
|Total Residuals = 0.50|
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