ASTM B564 UNS N08031 SO flange

ALLOY 1.4562 / UNS N08031 / ALLOY 31

Corresponding Standards: EN 1.4562, UNS N08031

ASTM B564 UNS N08031 SO flange, Alloy 31 Flange, Alloy 31 SO Flange, UNS N08031 Flange, Alloy 31 SO RF Flange

Alloy 31 SO Flange SPECIFICATION

Specifications : ASTM B564 / ASTM SB 564
Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, Custom Drawings
Size : 1/8″ – 48″
Pressure Ratings :150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Standards : ASTM, ASME Flanges, ANSI Flanges, DIN Flanges, EN Flanges, BS Flanges etc.

MATERIAL DESCRIPTION

• Alloy 31 is a nickel, chromium and molybdenum stainless steel with nitrogen and copper additions. It combines moderate tensile strength and high ductility with excellent corrosion resistance in sulfuric acid, reducing and oxidizing media and has strong resistance to corrosion and erosion corrosion in phosphoric environment.
• Typically the alloy has PREN of ≥ 48, which ensure that the resistance to pitting corrosion is high.

UNS N08031 CHEMICAL COMPOSITION

PREN = (CR% + 3.3MO% + 16N%) ≥ 48
PRODUCT STANDARDS: ASTM B625 – 14
APPROVALS: FOR USAGE IN PRESSURE VESSELS WITH WALL TEMPERATURES BETWEEN -196°C TO 550°C

APPLICATIONS

Typical applications: Pulp and paper industry, flue gas desulphurization – FGD – systems, sea water heat exchangers, petroleum production and refining industry, mining industry – ore processing…

Alloy 31 MECHANICAL PROPERTIES:

HEAT TREATMENT

Solution annealing at min 1150°C followed by water quenching.

WELDABILITY

Very good.