Carbon Content

The carbon content of a WC powder is commonly stated as total carbon and free carbon (uncombined carbon present as graphite or amorphous carbon). The difference between these values accounts for the combined carbon (chemically bound as carbide).
The total carbon content should be theoretically 6.13 wt% carbon, which means that all carbon is chemically combined as WC. However, in practice, a small amount of uncombined carbon is always present (some hundredths of percent).

The proper total carbon depends on further processing of the powder (compact) and is dictated by the hardmetal producer, due to its processing experience (carburizing, neutral, or decarburizing conditions).

The determination method is described in ISO 3907 and ISO 3908 and should result in standard deviation of no more than +0.01 wt%.

More information, please visit www.tungsten-powder.com

Specification of Tungsten Oxide from National Standard

Specification of tungsten oxide from national standard

Grades		WO3-0 WOX-0	WO3-1 WOX-1	WO3-2 WOX-2
Impurity Content Max.	Al	0.0005	0.001	0.001
	As	0.001	0.001	0.003
	Bi	0.0001	0.0001	0.0005
	Ca	0.001	0.001	0.003
	Co	0.001	0.001	0.002
	Cr	0.001	0.001	0.001
	Cu	0.0003	0.0005	0.001
	Fe	0.001	0.001	0.003
	K	0.001	0.0015	0.002
	Mg	0.0007	0.001	0.002
	Mn	0.001	0.001	0.001
	Mo	0.002	0.005	0.02
	Na	0.001	0.0015	0.003
	Ni	0.0007	0.0007	0.001
	P	0.0007	0.001	0.002
	Pb	0.0001	0.0001	0.0005
	S	0.0007	0.001	0.001
	Sb	0.0005	0.001	0.002
	Si	0.001	0.001	0.003
	Sn	0.0002	0.0005	0.001
	Ti	0.001	0.001	0.002
	V	0.001	0.001	0.002
	WO3 LOI	0.5	0.5	0.5

More information, please visit our website: www.tungsten-powder.com

Specification of Tungsten Carbide Powder from National Standard

Specification of tungsten carbide powder from national standard

牌号Grades	比表面积/(m2/g)	平均粒度范围(F.S.S.S) /µm	氧含量(Oxygen) /%不大于	总碳(TC)/ %	游离碳(FC) /%不大于	化合碳(CC) /%不小于
FWC02-04	＞	--	0.35	6.20~6.30	0.20	6.07
FWC04-06	1.5~2.5	--	0.30	6.15~6.25	0.15	6.07
FWC06-08	--	≥0.60~0.80	0.20	6.13~6.23	0.12	6.07
FWC08-10	--	＞0.8~1.00	0.18	6.08~6.18	0.08	6.07
FWC10-14	--	＞1.00~1.40	0.15	6.08~6.18	0.06	6.07
FWC14-18	--	＞1.40~1.80	0.15	6.08~6.18	0.06	6.07
FWC18-24	--	＞1.80~2.40	0.12	6.08~6.18	0.06	6.07
FWC24-30	--	＞2.40~3.00	0.10	6.08~6.18	0.06	6.07
FWC30-40	--	＞3.00~4.00	0.08	6.08~6.18	0.06	6.07
FWC40-50	--	＞4.00~5.00	0.08	6.08~6.18	0.06	6.07
FWC50-70	--	＞5.00~7.00	0.05	6.08~6.18	0.06	6.07
FWC70-100	--	＞7.00~10.00	0.05	6.08~6.18	0.06	6.07
FWC100-140	--	＞10.00~14.00	0.05	6.08~6.18	0.06	6.07
FWC140-200	--	＞14.00~20.00	0.05	6.08~6.18	0.06	6.07
FWC200-260	--	＞20.00~26.00	0.05	6.08~6.18	0.06	6.07
FWC260-350	--	＞26.00~35.00	0.08	6.08~6.18	0.06	6.07

More information, please visit our website: www.tungsten-powder.com

Analyses of tungsten powder from national standard

Analyses of tungsten powder from national standard

Grades		FW-1	FW-2	FWP-1
Impurity Content(%)Max	Fe	F.S.S.S< 10um;0.0050	0.030	0.030
		F.S.S.S≥10um;0.010
	Al	0.0010	0.0040	0.0050
	Si	0.0020	0.0050	0.010
	Mg	0.0010	0.0040	0.0040
	Mn	0.0010	0.0020	0.0040
	Ni	0.0030	0.0040	0.0050
	As	0.0015	0.0020	0.0020
	Pb	0.0001	0.0005	0.0007
	Bi	0.0001	0.0005	0.0007
	Sn	0.0003	0.0005	0.0007
	Sb	0.0010	0.0010	0.0010
	Cu	0.0007	0.0010	0.0020
	Ca	0.0020	0.0040	0.0040
	Mo	0.0050	0.010	0.010
	K+Na	0.0030	0.0030	0.0030
	P	0.0010	0.0040	0.0040
	C	0.0050	0.010	0.010
	O	Sheet Ⅱ		0.20

More information, please visit our website：www.tungsten-powder.com