Sponge titanium is light gray particles or sponge-shaped titanium metal, is the raw material for manufacturing titanium products and titanium powder. Almost all the sponge titanium is produced by the Kroll process, which reduces titanium tetrachloride with metal magnesium, making the ilmenite into titanium tetrachloride, and reacts with metal magnesium to get sponge-like porous “sponge titanium”. At present, the world’s production of sponge titanium countries concentrated in Japan, the United States, Russia, Kazakhstan, Ukraine and China and a few other countries, all factories choose the magnesium reduction – distillation combined process. The purity % (mass) of spongiform titanium produced by the metal thermal reduction method is generally 99.1-99.7, the total amount of impurity element % (mass) is 0.3 ~ 0.9, the oxygen % (mass) is 0.06 ~ 0.20, and the hardness (HB) is 100 ~ 157. The chemical composition of titanium sponge varies with the standard. Today, we introduce the chemical composition of titanium sponge standards of the United States, Russia, Japan and China.

ASTM B299 Chemical Requirements

Weight by % (Dry Basis) N 0.02 C Na Mg Al Cl Fe Si H O Water Ti, min Brinell Hardness, HB.,max
GPA 0.02 0.03 F F 0.05 0.2 0.15 0.04 0.03 0.15 0.02 Reminder 140
ELB 0.008 0.02 0.1 0.08 0.03 0.10 0.05 0.04 0.02 0.08 0.02 Reminder 110
SLC 0.015 0.02 0.19 / 0.05 0.20 0.05 0.04 0.05 0.10 0.02 Reminder 120
MLD 0.015 0.02 / 0.50 0.05 0.20 0.15 0.04 0.03 0.10 0.02 Reminder 140
MDE 0.015 0.02 / 0.08 / 0.12 0.12 0.04 0.010 0.10 0.02 Reminder 140

GOST 17746 Titanium Sponge Chemical Composition

Grades Ti, min Fe Si Ni C Cl O N Brinell Hardness, HB.,
10/1500/30, max
TG90 99.74 0.05 0.01 0.04 0.02 0.08 0.04 0.02 90
TG100 99.72 0.06 0.01 0.04 0.03 0.08 0.04 0.02 100
TG110 99.67 0.09 0.02 0.04 0.03 0.08 0.06 0.02 110
TG120 99.64 0.11 0.02 0.04 0.03 0.08 0.06 0.02 120
TG130 99.56 0.13 0.03 0.04 0.03 0.10 0.08 0.03 130
TG150 99.45 0.20 0.03 0.04 0.03 0.12 0.10 0.03 150
TGTv 97.75 1.90 / / 0.1 0.15 0.10 / /

JIS H2151 Titanium Sponge Chemical Composition

Grade A(%): Particle Size : -19.1+0.84mm

Product No. Mn Fe Mg N Si C H O Cl Ti
(min.)
1 (TST-P) 0.005 0.04 0.04 0.008 0.02 0.01 0.003 0.04 0.08 99.7
2 (TST-1) 0.005 0.04 0.04 0.01 0.02 0.01 0.003 0.05 0.08 99.7
3 (TST-2) 0.005 0.06 0.05 0.01 0.02 0.01 0.004 0.05 0.10 99.6
4 (TST-3) 0.010 0.08 0.06 0.01 0.02 0.02 0.005 0.06 0.12 99.4

Grade B(%)

Product No. N（max.） Ti（min.）
1 (TAT-12) 0.3 97.0

Grade D(%)

Ti
90.0 min.

GB/T 2524 Titanium Sponge Chemical Composition

According to GB/T 2524, there are six grades of titanium sponge from 0-5, corresponding to MHT-100 to MHT-200 according to purity (The number 100 means that the Brinell hardness of titanium sponge is not greater than 100).

Grades Products No Ti, min Fe Si Cl C N O Mn Mg H Brinell Hardness, HB.,
10/1500/30, max
0 MHT-100 99.7 0.06 0.02 0.06 0.02 0.02 0.06 0.01 0.06 0.005 100
1 MHT-110 99.6 0.1 0.03 0.08 0.03 0.02 0.08 0.01 0.07 0.005 110
2 MHT-125 99.5 0.15 0.03 0.1 0.03 0.03 0.1 0.02 0.07 0.005 125
3 MHT-140 99.3 0.2 0.03 0.15 0.03 0.04 0.15 0.02 0.08 0.01 140
4 MHT-160 99.1 0.3 0.04 0.15 0.04 0.05 0.2 0.03 0.09 0.012 160
5 MHT-200 98.5 0.4 0.06 0.3 0.05 0.1 0.3 0.08 0.15 0.03 200