A550
A550 (Standard Specification for Ferrocolumbium (Ferroniobium))· ASTM (United States) · 3 materials
| Designation | Material group | |
|---|---|---|
| A 550 Alloy and Stainless Steel Grade | Niobium | chevron_right |
| A 550 High Purity Grade | Niobium | chevron_right |
| A 550 Low Alloy Steel Grade | Niobium | chevron_right |