Hastelloy C-4
Hastelloy C-4 (N06455) Hastelloy alloy is an austenitic low carbon nickel-molybdenum-chromium alloy. The main difference between Nicrofer 6616hMo and other earlier developed alloys of similar chemical composition is the low carbon, silicon, iron and tungsten content. Such chemical composition makes it show excellent stability at 650-1040℃, improves the ability to resist intergranular corrosion, and can avoid edge line corrosion sensitivity and weld heat affected zone corrosion under appropriate manufacturing conditions.
Content
Chemical composition of Hastelloy C-4 (%)
| Element | Minimum(%) | Maximum(%) |
|---|---|---|
| Ni | remiander | remiander |
| Cr | 14.5 | 17.5 |
| Fe | - | 3 |
| C | - | 0.009 |
| Mn | - | 1 |
| Si | - | 0.05 |
| Mo | 14 | 17 |
| Co | - | 2 |
| Ti | - | 0.7 |
| P | - | 0.02 |
| S | - | 0.01 |
Physical properties of Hastelloy C-4
| Property | Value |
|---|---|
| Density | 8.94 g/cm3 |
| Melting range | 1325-1370 ℃ |
Mechanical properties of Hastelloy C-4 alloy
| Property | Value |
|---|---|
| Tensile Strength | 650 MPa (115 ksi) |
| Yield Strength (0.2% Offset) | 280 MPa (51.5 ksi) |
| Elongation | 40% |
Applications of Hastelloy C-4
The higher content of molybdenum and chromium enables Hastelloy C-4 alloy to resist corrosion from various chemical media, including reducing media such as phosphoric acid, hydrochloric acid, sulfuric acid, chlorine, organic or inorganic chlorine-containing media. Due to the high nickel content, Hastelloy C-4 can effectively resist stress corrosion cracking caused by chlorine, even hot chloride solutions.
