Alloy 31 Pipes, Fittings and Flanges

1. Alloy 31 material

Alloy 31 (EN / DIN designation: 1.4562, ASME designation: UNS N08031) is a nickel-iron-molybdenum-chromium alloy with nitrogen addition. It has excellent resistance to erosion and corrosion in services of phosphoric acid, sour gas, chloride, alkaline, sulfuric acid and acid halide, etc. The alloy 31 piping components(flange, valve, fittings and pipes) are widely utilized in paper industry, oil and gas projects, seawater treatment, and chemical & petrochemical plants.

2. Chemical Composition of Alloy 31

C	Si	Mn	P	S	Cr	Ni	Mo	Cu
0.015	0.030	2.00	0.02	0.01	26.0~28.0	30.0~32.0	6.0~7.0	1.0~1.4
Others	N	Al	Ti	Fe	Co	V	W	Nb+Ta
Others	0.15~0.25	-	-	Rest	-	-	-	-

3. Mechanical and Physical Properties of Alloy 31

Density g/cm3	Melting Point ℃	Hardness HB	Yield Strength MPa	Tensile Strength MPa	Elongation %
8.1	1350~1370	≥220	≥276	≥650	≥40

4. Products Available

Hebei Metals can provide alloy 31 products in types of billets, bars, plates, pipes, tubes, fittings, flanges, valves and pressure vessels.

Views: Author：hbmetals Date:15/03/16