Hastelloy C-22, NS 3308 (00Cr22Ni60Mo13W3) physical and chemical features

The 00Cr22Ni60Mo13W3 alloy is an improvement and development of the aforementioned several high Mo nickel chromium molybdenum alloys. Its chemical composition is characterized by extremely low C and Si contents, high Cr content, moderate Mo content and W content. Because of these characteristics, the corrosion resistance of hastelloy C-22 alloy is better in many media than the above-mentioned nickel-chromium-molybdenum (tungsten) alloys, especially in oxidizing media such as FeCl3, 0^12, moisture, oxidation. – More pronounced in reducing acids. At the same time, the alloy still has excellent resistance to pitting, crevice corrosion and stress corrosion. Due to the extremely low C and Si content of this alloy, it is very suitable for the manufacture of corrosion-resistant welding equipment, vessels and pipelines in the chemical industry without the risk of sensitization.
8.3.4. 1 Chemical composition and organizational structure
The chemical composition of hastelloy C-22 alloy is shown in Table 8-7. In the solid solution state, the structure of the alloy consists of austenite. During the intermediate temperature aging, a small amount of carbides and intermediate phases are precipitated. Since the precipitation amount is extremely small, the corrosion resistance and mechanical properties of the alloy are not harmful.
8.3.4.2 Mechanical properties
The instantaneous mechanical properties of roomtel and high temperature in different states of hastelloy C-22 (00Cr22Ni60Mo13W3) alloy are shown in Table 8-44 to Table 8-46. The alloy in the solid solution state did not cause plasticity drop of the alloy after aging at 500 ° C for 100 h, but increased. Cold working increases the strength of the alloy and decreases with plasticity. As the amount of cold working increases, the degree of influence increases.
Table 8-47 and Table 8-48 show the impact properties and hardness data for the alloy.

Table 8-44 Mechanical properties of hastelloy C-22 (00Cr22Ni60Mo13W3) alloy in solid solution statepr

Table 8-45 Cold working and cold working and aging state hastelloy C-22 (00Cr22Ni60Mo13W3)

Table 8_46 hastelloy C-22 (00Cr22Ni60Mo13W3)

Table 8-47 Notched impact properties of 00Cr22Ni60Mol3W3 alloy

Table 8-48 hastelloy C-22 (00Cr22Ni60Mo13W3)