Abstract: An article of manufacture formed of an alloy having the following weight percent composition is described. Carbon 0.25 max. Manganese ?14-20? Silicon up to 2.0 Phosphorus 0.05 max. Sulfur ?0.5 max. Chromium ?12-22? Nickel ?3.5 max. Molybdenum 0.5-4?? Copper ?2.0 max. Nitrogen 0.2-0.8 Boron 0.06 max. The balance of the alloy is iron and the usual, inevitable impurities found in commercial grades of stainless steel alloys. Optionally, the alloy may contain niobium, titanium, vanadium, zirconium, hafnium, and tungsten in a combined amount of up to about 0.5%. An intermediate form of the article is armor plate made from the alloy. In accordance with another aspect of the present invention, the plate is shaped to form an armor part that is attached to a larger structure to provide resistance to an explosion fragments or a ballistic projectile.

Abstract: A golf club head is described which has a body that is formed at least in part from a stainless steel alloy having the following composition in weight percent: Carbon 0.25 max. Manganese 14-20 Silicon up to 2.0 Phosphorus 0.05 max. Sulfur ?0.5 max. Chromium 12-22 Nickel ?3.5 max. Molybdenum 0.5-4?? Copper ?2.0 max. Nitrogen 0.2-0.8 Boron 0.06 max. The balance of the alloy is iron and the usual impurities. The stainless steel alloy provides a hardness of about 80 HRB up to about 25 HRC. The golf club head provides a unique combination of high strength and hardness, good ductility, excellent “feel”, and good durability. A method of making the disclosed golf club head is also described.