Penn Stainless Products offers an expansive stainless steel and nickel inventory, complete in-house processing, fast delivery & knowledgeable staff. Penn Stainless supplies stainless steel plate, sheet, bar, structurals and tubular products. Materials include 304, 304H, 309S, 310S, 316L, 321, 330, 347, Duplex Grades, 400 series and precipitation hardening grades