A nickel-iron-chromium grade with addition of molybdenum and copper, Alloy 825 has excellent corrosion resistance.
Alloy 825 is a high performing nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. The nickel content is sufficient for resistance to chloride-ion stress-corrosion cracking.
| % | Ni | Cr | Fe | C | Mn | Si | Cu | Mo | Al | Ti | P | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 38 | 19.5 | Balance | 0 | 0 | 0 | 1.5 | 2.5 | 0 | 0.6 | 0 | 0 |
| Max | 46 | 23.5 | - | 0.05 | 1 | 0.5 | 3 | 3.5 | 0.2 | 1.2 | 0.020 | 0.010 |
The nickel in Alloy 825, in conjunction with the molybdenum and copper, gives superb resistance to reducing environments such as those containing sulphuric and phosphoric acids. The molybdenum prevents resistance to pitting and crevice corrosion. The alloy’s chromium content confers resistance to a variety of oxidising substances such as nitric acid, nitrates and oxidising salt.
NeoNickel specialises in supplying high performance metal alloys to a wide variety of industries. As a highly respected European supplier we provide the finest quality heat resistant, corrosion resistant, aerospace, titanium and stainless steel alloys anywhere on the market.
| Mechanical & Physical Properties | 21.1°C | 93.3°C | 148.9°C | 204.4°C | 315.6°C | 371.1°C | 426.7°C | 537.8°C | 684.9°C | 982°C |
|---|---|---|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength /MPa | 585 | 530 | 525 | 515 | 500 | 495 | 485 | - | - | - |
| 0.2% Yield Strength /MPa | 240 | 205 | 190 | 180 | 170 | 165 | 155 | - | - | - |
| Elongation % | 30 | - | - | - | - | - | - | - | - | - |
| Coefficient of Thermal Expansion /µm/m°C ** | - | 14.1 | 14.1 | 14.8 | 15.3 | 15.6 | 15.6 | 15.8 | 16 | - |
| Thermal Conductivity /kcal/(hr.m.°C) | 9.55 | 10.578 | 10.578 | 11.868 | 13.224 | 14.534 | 14.534 | 15.652 | 16.856 | - |
| Modulus of Elasticity / GPa | 196 | 192 | 192 | 187 | 181 | 174 | 174 | 168 | 162 | 118 |
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