MAT21 alloy is a nickel-chromium-molybdenum-tantalum alloy with improved corrosion resistance. MAT21 alloy is a much-awaited, unprecedented alloy that is better than stainless steel, even better than the other Ni-Cr-Mo corrosion-resistant alloys which are known for their high corrosion resistance under various conditions. MAT21 has shown favorable results in the evaluation by Bayer, a German pharmaceutical manufacturer. It is now regarded as a material suitable for drug manufacturing plants.
MAT21, has high tensile strength, 1.5 to 2 times higher than austenite stainless steel, enabling thinner wall thickness design. It maintains its high impact value, needless to say at room temperature, and even at very low temperatures (-193) . High temperature steam cleaning and strong brushing pose no problem.
MAT21, like MA276, has weldability and workability that are comparable to austenite steel. Dissimilar metal welding to stainless steel is possible.
Various shapes, such as flat-rolled plates, forgings, welding wire, wire, welded pipes and tubes, seamless pipes and tubes can be manufactured. (Also application to towers and vessels, heat exchangers, piping is possible )
MAT21PATalloy is the first nickel base alloy made in Japan to be registered as material standard of the United States.
| Plates | Bars, Forgings | Pipes and Tubes | Joints |
|---|---|---|---|
| B575 | B564 | B619 | B366 |
| B574 | B622 | ||
| B626 |
| Plates | Bars, Forgings | Pipes and Tubes | Joints |
|---|---|---|---|
| SB-575 | SB-564 | SB-619 | |
| SB-574 | SB-622 | - | |
| SB-626 |
Code Case2302
| MAT21 | MA276 | MA625 | SUS316 | |
|---|---|---|---|---|
| 1% Hydrochloric acid | 0.01 | 0.45 | 4.86 | 24.0 |
| 40% Sulfuric acid | 0.30 | 1.70 | 1.27 | Disappered |
| 10% Nitric acid | 0.09 | 0.25 | 0.03 | 0.05 |
| ASTM G28 Method B* |
0.39 | 1.00 | - | 38.2 |
*23%H2SO4+1.2%HCl + 1%FeCl3+ 1%CuCl2
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