Explanatory notes
… sheets, plates or strip), bars and rods, angles, shapes or sections, or wire. All these products may be worked provided … quantities of boron (0.0008 % or more by weight) or of niobium (0.06 % or more by weight). (3) Alloy steels, … (8) Non‑magnetic alloy steels resistant to shock and abrasion, having a high manganese content. (9) High speed …