Alloy 31

We can supply many different style, such as ring, flange, sheet, tube, rod, wire and so on.

CharacteristicAlloy31 is one kind of azotic contenting iron nichrome molybdenum alloy, the performance is situated between the super austenite stainless steel and the nickel base alloy. The alloy 31 suit applies in chemistry and the petroleum chemical industry, the environment project and the oil,gas,and so on industrial fields. Has the following characteristic:1.In halogenide medium (either acidity or alkalinity) have the excellent corrosion resistance ability. 2.Has the splendid corrosion resistance ability in any density's sulfuric acid 3.Has splendid resistance to both corrosive and erosion corrosion ability in the phosphoric acid medium 4.In the chlorine dioxide bleaching  medium with excellent localized corrosion resistance and the ability of uniform corrosion ability5.In the oxidation and reduction environment are good corrosion resistance6.Easy to processing and welding7.With a wall temperature can be used in the manufacture of -196 ~ 450 in the pressure vessel certification

Metallurgical structureAlloy31 is the face centered cubic lattice structure, 0.2% of the nitrogen content of the stability of the austenitic phase, to reduce the inter-metal phase precipitation trend.

Corrosion resistanceAlloy31 the chemical composition so that it has a very good resistance to halide corrosion. Meantime, the alloy also has excellent resistance to a variety of temperature and the concentration of pure or impure sulfuric acid corrosion performance. Corrosion in a very strong wet-process phosphoric acid production conditions, Alloy31 is the most suitable nickel-based alloys. Similarly, more experimental shows Alloy31 in the pulp and paper industry in a very harsh chlorine bleach solution with a very good corrosion resistance. Alloy31 the intergranular corrosion-resistant (IGA) in accordance with ASTM G-28 test standard and Germany standard test SEP 1877 II. Alloy31 the pitting corrosion in accordance with ASTM G-28 A test standard. The alloy material is only suitable in the state of metallurgical structure and pure crystal structure in order to have the best corrosion resistance. Alloy31 between the 20% -80% of the concentration of sulfuric acid solution (the temperature does not exceed 80) has a very good corrosion resistance performance. In a variety corrosion of media, Alloy31 showed a obvious advantage. In the ASTM G-30-72 SCC test, Alloy31 to show better than other alloys stress corrosion cracking resistance performance.

Applied field1.Flue gas desulphurisation system                                                                                 2.The pulp and paper industry3.Synthesis of fine chemicals industry                                                                     4.Phosphoric acid production 5.Synthesis of organic acids and esters                                                                          6.Sulfuric acid waste recycling 7.Seawater or salt water heat exchanger                                                                              8.Ore processing, high-pressure clay mineral acid leaching technology9.Oil production and refining                                                                                         10.Pickling plant (H2SO4) 11.Sulfuric acid condenser                                                                                    12.Evaporation and crystallization of salt13.Environment and acid gases (NACE standards in line with the MR0175, to reach grade VI)

Alloy 31