American standard hartz alloy on gate valves with Ding Nai eclipse valves, mainly hartz hartz alloy alloy B and l C these two broad categories. In the United States ASTM A494-1995 standard, the hartz alloy the lists only hartz alloy B and C hartz alloy.

In ASTM A494-1995 standard: B the hartz alloy casting alloy for N - 12 mv (also known as 12 m - N - 1) and N - 7 m (some data call N - 12 m - 2, also called it Chlorimert 2 alloy).

C the hartz alloy casting brand for the CW - 12 mw (also known as the CW - 12 m - 1) and the CW - 7 m (some call it the CW - 12 m - 2, also called it Chlorlmert 3 alloy) and hartz alloy C - 276, the casting brand for the CW - 6 MC (note. No such casting brand in ACI standard) and hartz alloy C - 4, the casting brand for the CW - 2 m.

All kinds of hartz alloy USES:

HASTELLOY A purpose: hydrochloric acid corrosion resistance, but the antioxidant erosion

Use of HASTELLOY B: for various concentrations of hydrochloric acid corrosion, the non oxidizing salt and acid corrosion

HASTELLOY C purposes: to oxidizing solvents, low concentration of hydrochloric acid and nitric acid corrosion resistance at room temperature

HASTELLOY F the purpose: the oxidation resistance and reducing corrosion of acid and alkali solution, won't produce pitting corrosion in chloride solution

HASTELLOY G USES: sulfuric acid, nitric acid, phosphoric acid and water resistant, but not resistant to acid halogen elements

HASTELLOY H USES: hot sulfuric acid, hydrochloric acid, the ability of various concentration of oxidizing acid and salts, in the condition of high temperature oxidation, processing difficult.