PNP SPECIAL ALLOYS
Stainless and Special Alloys Steel
Our steel mills group produce the following series of stainless steel and duplex plates: 201 Stainless Steel Plate, 202 Stainless Steel Plate, 2205 Stainless Steel Plate, 2507 Stainless Steel Plate, 304 Stainless Steel Plate, 304L Stainless Steel Plate, 309 Stainless Steel Plate, 309S Stainless Steel Plate, 310 Stainless Steel Plate, 316 Stainless Steel Plate, 316L Stainless Steel Plate, 347H Stainless Steel Plate, 430 Stainless Steel Plate, 904L Stainless Steel Plate and 800H Series Plates.
SA-240 Gr 304/304L
304 and 304L stainless steel plates are part of the austenitic family of stainless steel and they are one of the most versatile and widely used varieties of stainless plate. They are a relatively low cost stainless product and used in a variety of applications. 304 grades have excellent low temperature properties and respond well to hardening by cold working. 304 stainless steel plate grades have good welding characteristics and post weld annealing is not normally required to restore performance. 304 SS plates have excellent corrosion resistance in a variety of different media. Typical specifications for 304 and 304L stainless steel plates are ASME SA -240.
SA-240 Gr 316/316L
Alloys 316 (UNS S31600) and 316L (UNS S31603) are molybdenum-bearing austenitic stainless steels, which are more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels such as Alloy 316L. These alloys also offer higher creep, stress-to-rupture, and tensile strength at elevated temperatures. In addition to excellent corrosion resistance and strength properties, the Alloys 316 and 316L Cr-Ni-Mo alloys also provide excellent fabricability and formability which are typical of the austenitic stainless steels.
The material has superior welding and forming qualities. Grade 316 will require post-weld annealing to promote maximum corrosion resistance, though this is not necessary if Type 316L is used.
SA-240 Gr 2205 and 2507
Super duplex stainless steel such as 2205 (UNS S31803) and 2507 (UNS S32750) is a super stainless steel which contains 25% chromium, 4% molybdenum, and 7% nickel designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. The steel has excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion. For more information, please download our stainless and special alloy products leaflets.