Valve material and valve standards-(1)

What material is WCB/LCB/LCC/WC6/WC in the valve?
W, wrought casting; C, Carbon steel; A, B, C indicate the strength value of steel grades from low to high.

WCA, WCA, WCC represent carbon steel, ABC represents the strength level, and WCB is commonly used. The corresponding pipe material of WCB should be A106B, and the corresponding forging material should be A105.
WC6 is an alloy steel casting, the corresponding pipe material is about A355 P11, and the forging is A182 F11; there is also WC9, high temperature resistant alloy steel, the corresponding pipe material is about A355 P22, and the corresponding forging is A182 F22.
WC: weldable casting
LCB/LCC (ASTM A352) low temperature carbon steel
ITCS is carbon steel with impact toughness; impact test C=carbon S=steel (A350)
Split body split type, side entry side mounted (referring to the actuator), corresponding to TOP entry top mounted type

Commonly used valve casting and forging carbon steel material table

material	country	standard	material grade name
Casting	China	GB/T 12229	WCA	WCB	WCC
			ZG205-415	ZG250-485	ZG275-485
	USA	ASTM A216/A216M	WCA	WCB	WCC
			UNS J02502	UNS J03002	UNS J02503
Forged	China	GB/T 12228 GB/T 699	25 25Mn 35 40 A105
	USA	ASTM A105/A105M	A105

Low temperature casting parts material name and temperature range

C	C	C-Mn	C-Mo	2.5Ni	Ni-Cr-Mo	3.5Ni	4.5Ni	9Ni	Cr-Ni-Mo
LCA	LCB	LCC	LC1	LC2	LC2-1	LC3	LC4	LC9	CA6NM
J02504	J03303	J02505	J12522	J22500	j42215	j31550	j41500	j31300	j91540
-32	-46	-46	-59	-73	-73	-101	-115	-115	-73

Commonly used valve ASTM Casting and Forged material sheet (ASME B16.5)

ASTM Casting	ASTM Forged	China name	Temp °C	suitable medium
Carbon steel
A216 WCB	A105	20	-29/427	water,steam,air,petroleum products
Low temp Carbon steel
A352 LCB	A350 LF2	16Mn	-46/343
A352 LCC	A350 LF2	16Mn	-46/343
High temp alloy
A217 WC1	A182 F1	20MnMo	-29/454	High temp, High pressure medium
A217 WC6	A182 F11	15CrMo	-29/552	High temp, High pressure medium
A217 WC9	A182 F22	10Cr2Mo1	-29/593	High temp, High pressure medium
A217 C5	A182 F5	1Cr5Mo	-29/650	Corrosive high temperature medium
A217 C12	A182 F9	Cr9Mo1	-29/593	High sulfur oxidizing medium
Martensitic stainless steel
A217 CA15	A182 F6a	Cr9Mo1	-29/593	High sulfur oxidizing medium
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
low carbon Austenitic stainless steel（C≤0.03）
A351 CF3	A182 F304L	00Cr18Ni10	-0.459016393	corrosive medium
A351 CF3M	A182 F316L	00Cr18Ni14Mo2	-196/454	corrosive medium
Special alloy
A351 CN7M	B462Gr.NO8020 (ALLOY20)		-29/149	Oxidizing medium and various concentrations of sulfuric acid
A494 M-30C (Monel alloy)	B4564 Gr.NO4400		-29/482	Hydrofluoric acid, Sea water
Hastelloy H.B H.C				Strong corrosive medium such as dilute sulfuric acid

Notes:
1. Forged valve body material is dense, not easy to have defects, the structure size is not limited by the mold, and the pressure bearing performance is reliable. It is mostly used for high pressure, oxygen working conditions, small diameter or other small batch valve manufacturing, generally at high temperature, Choose forgings under high pressure or low temperature or special medium; castings are generally only suitable for medium and low pressure, and are mostly used for mass production of standardized molded valves.

2. The difference between material A351 CF3M and A182 F316L: the materials corresponding to the two standards are 316 stainless steel. CF3M stands for castings and is often used as valve material. The corresponding forging steel code is A182 F316L. ASTM A216 WCB is a casting, and its forging is A105; the casting of SS304 is A351-CF8, and the forging is A182-F304.