NXF ASTM A240 316H/1Cr17Ni12Mo2/31609 DN15-1200 Class150-2500 Stainless Steel 316H Forging ANSI B16.5 Weld Neck Flange

Alloy 316H (UNS S31609) is a high carbon modification of Alloy 316 developed for use in elevated temperature service. The alloyhas higher strength at elevated temperatures and is used for structural and pressure vessel applications at temperatures above932°F (500°C). The higher carbon content of 316H also delivers higher tensile and yield strength than 316/316L and its austeniticstructure provides excellent toughness down to cryogenic temperatures.The corrosion resistance of Alloy 316H is comparable to Alloy 316/316L and is superior to Alloy 304/304L in moderately corrosiveenvironments. It is often used in process streams containing chlorides or halides. The alloy resists atmospheric corrosion, aswell as, moderately oxidizing and reducing environments. It also resists corrosion in polluted marine conditions.Alloy 316H is non-magnetic in the annealed condition. It cannot be hardened by heat treatment, however the material will hardendue to cold working. It can be easily welded and processed by standard shop fabrication practices.

Weld neck flange refers to a flange with a tapered neck and butt welding with the cylinder or pipe. It is an integral flange. Due to the transition structure of the taper neck and butt welding connection, the strength and rigidity of the flange are enhanced, and the sealing performance is better than that of the flat welding flange. The disadvantage is that it needs to be made with forgings, which consumes a lot of materials and costs a lot. Suitable for occasions with high pressure, high temperature or high sealing requirements.

316H Weld Neck Flange Drawing