ASTM A790 UNS S32750 Welded Pipe

ASTM A790 UNS S32750 is a variation of super duplex steel. The duplex steel material is made up of chromium and molybdenum alloy. The duplex has the ferritic and austenitic steel properties in its metallurgic microstructure. This gives the name duplex to the material. The SA 790 UNS S32750 belongs to the super duplex category. There are three groups of duplex, namely the duplex, super duplex and lean duplex. Each of them has their own composition and specific mechanical properties as a result. As the Super Duplex UNS S32750 Pipe belongs to the super duplex category, it is used for high strength and high corrosive applications. The alloy has 25% chromium in its composition along with 4% molybdenum and 7% nickel. This material composition makes it stronger and much corrosion resistant than the ordinary duplex material.

UNS S32750 Pipe Chemical composition

Carbon	Chromium	Manganese	Molybdenum	Nitrogen	Nickel	Phosphorus	Sulfur	Silicon
0.030 max	24.0-26.0	1.20 max	3.0-5.0	0.24-0.32	6.0-8.0	0.035 max	0.020 max	0.8 max

UNS S32750 Specifications & Equivalent

Alloy	Common Name	British	European	United States	Tensile Strength	Proof Stress	Elongation
Super Duplex Alloy 2507	Alloy 2507	1.4410	UNS S32750	F53	800 [116]	550 [79.8]	15

A790 UNS S32750 Mechanical Strength

Melting Range (°C)	1350
Melting Range (°F)	2460
UNS	S32750
Density (g/cm 3)	7.8
Density (lb/in 3)	0.281

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