How to choose the material of WCB/LCB/LCC/WC6/WC for the valve?

W means write, cast;

C-CARBON STEEL carbon steel, A, b, and C indicate the strength value of the steel type from low to high.

WCA, WCB, WCC represents carbon steel, which has good welding performance and mechanical strength. ABC represents strength level, commonly used WCB. The pipe material corresponding to the WCB should be A106B, and the corresponding forging material is A105. Suitable for valves under conventional temperature and pressure.

WC6 is the casting of alloy steel. It has excellent high temperature resistance and antioxidant properties and is suitable for valves under high temperature and high pressure conditions.

The corresponding pipeline material is about A355 P11, and the forging part is A182 F11;

In addition, there is WC9, high -temperature alloy steel, corresponding to about about A355 P22, and the forging should correspond to A182 F22.

WC welded casting has high strength and hardness. Suitable for conventional industrial applications.

LCB/LCC (ASTM A352) Low -temperature carbon steel has low toughness and corrosion resistance. It is suitable for low -temperature ultra -low temperature applications, such as LPG natural gas (LNG).

Zfa Valves produce common WCB butterfly valves for customers all over the world with common temperature , and we also can produce LCC butterfly valves for Customers from North of Europe like Russia, Finland etc.

wcb and lcc butterfly valveabove is WCB China wafer butterfly valve and LCC China lug  butterfly valve.

Carbon steel castings and forged materials commonly used in valves

Material Status Notice Standard Number Material Number
casting China GB/T 12229 WCA WCB WCC
ZG205-415 ZG250-485 ZG275-485
America ASTM A216/A216M WCA WCB WCC
UNS J02502 UNS J03002 UNS J02503
Forged China GB/T 12228GB/T 699 25 25Mn 35 40 A105
America ASTM A105/A105M A105


Low -temperature cast steel material grades and applicable temperature

type C C C-Mn C-Mo 2.5Ni Ni-Cr-Mo 3.5Ni 4.5Ni 9Ni Cr-Ni-Mo
Material Number LCA LCB LCC LC1 LC2 LC2-1 LC3 LC4 LC9 CA6NM
UNS No. J02504 J03303 J02505 J12522 J22500 J42215 J31550 J41500 J31300 J91540
Applicable temperature ℃ -32 -46 -46 -59 -73 -73 -101 -115 -196 -73


ASTM material forging and casting comparison tables commonly used in valves(ASME B16.5)

ASTM casting ASTM forged Chinese No. Applicable temperature ℃ Applicable medium
Carbon Steel
A216 WCB A105 20 -29~427 Water, steam, air, and petroleum products
Low -temperature carbon steel
A352 LCB A350 LF2 16Mn -46~343 Low temperature medium
A352 LCC A350 LF2 16Mn -46~343 Low temperature medium
High -temperature alloy steel
A217 WC1 A182 F1 20MnMo -29~454 High temperature and high pressure medium
A217 WC6 A182 F11 15CrMo -29~552 High temperature and high pressure medium
A217 WC9 A182 F22 10Cr2Mo1 -29~593 High temperature and high pressure medium
A217 C5 A182 F5 1Cr5Mo -29~650 Corrosive high temperature medium
martensitic stainless steel
A217 CA15 A182 F6a 1Cr13 -29~371 Strengthis lower than 304 above 450℃
austenitic Stainless Steel(C≤0.08)
A351 CF8 A182 F304 0Cr18Ni9 -196~537 Corrosive medium
A351 CF3 A182 F304L -196~425 Corrosive medium
A351 CF8M A182 F316 0Cr18Ni12Mo2Ti -196~537 Corrosive medium
A351 CF3M A182 F316L -196~425 Corrosive medium
Ultra low carbon austenitic stainless steel(C≤0.03)
A351 CF3 A182 F304L 00Cr18Ni10 -196~427 Corrosive medium
A351 CF3M A182 F316L 00Cr18Ni14Mo2 -196~454 Corrosive medium
Special alloy
A351 CN7M B462 Gr. NO8020(ALLOY 20) -29~149 Oxidizing media and various concentrations of sulfuric acid
A494 M-30C(Monel) B564 Gr. NO4400 -29~482 Hydrofluoric acid, seawater


Note: 1) forged valve body material organization dense, not easy to have defects, structural dimensions are not subject to mold limitations, reliable pressure performance, mostly used for high-pressure, oxygen conditions, small diameter or other small batch of valves on the manufacture of high-temperature, high-pressure or low-temperature or special media under the choice of forging; casting is generally only applicable to medium and low-pressure, and is used for standardized molding of valves on the mass production.

(2) Material A351 CF3M and A182 F316L difference: the two standards correspond to the material are 316 stainless steel. CF3M indicates that the casting, commonly used as valve materials. Corresponding forging steel code is A182 F316L. ASTM A216 WCB is casting, and its forgings are A105; SS304 castings are A351-CF8, and forgings are A182-F304.


Post time: Nov-07-2023