Introduction

Solid Solution
Strengthened Alloy

Nickel

Chromium

Molybdenum

Corrosion
Resistance

96

Mechanical
Behavior

71

Purity

91

Overview

As a leading supplier & manufacturer in China, AEETHER supply cost-effective Hastelloy G-35 Products.

HASTELLOY® G-35® alloy (UNS N06035) was designed to resist “wet process” phosphoric acid (P2O5), which is used in the production of fertilizers. Tests in real-world solutions indicate that G-35 alloy is far superior to other metallic materials in this acid. It was also designed to resist localized attack in the presence of chlorides, since this can be a problem beneath deposits in evaporators used to concentrate “wet process” phosphoric acid. Furthermore, G-35 alloy is much less susceptible to chloride-induced stress corrosion cracking than the stainless steels and nickel-chromium-iron alloys traditionally used in “wet process” phosphoric acid.

As a result of its very high chromium content, G-35® alloy is extremely resistant to other oxidizing acids, such as nitric, and mixtures containing nitric acid. It possesses moderate resistance to reducing acids, as a result of its appreciable molybdenum content, and, unlike other nickel-chromium-molybdenum alloys, it is very resistant to “caustic de-alloying” in hot sodium hydroxide.

HASTELLOY® G-35® alloy is available in the form of plates, sheets, strips, billets, bars, wires, pipes, tubes, and covered electrodes. Applications include P2O5 evaporator tubes.

Comparative 0.1 mm/y Line Plots

To compare the performance of HASTELLOY® G-35® alloy with that of other materials, it is useful to plot the 0.1 mm/y lines. In the following graphs, the lines for G-35® alloy are compared with those of 625 alloy, 254SMO alloy, and 316L stainless steel, in hydrochloric and sulfuric acids. Note that the lines for G-35® alloy are close to those for 625 alloy. The hydrochloric acid concentration limit of 20% is the azeotrope, above which corrosion tests are less reliable.

Physical Properties

Mechanical Properties