MATERIAL DESCRIPTION

• Alloy 31 is a nickel, chromium and molybdenum stainless steel with nitrogen and cupper 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.

CHEMICAL COMPOSITION

WEIGHT% C SI MN S P CR NI MO N CU
MIN.  26,0  30,0  6,0  0,15  1,0
MAX.  0,015  0,3  2,00  0,010  0,020  28,0  32,0  7,0  0,25  1,4

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…

Mechanical Properties: BAR

YIELD STRENGTH
RP0.2
MPA
TENSILE STRENGTH
RM
MPA
ELONGATION
[%]
HARDNESS
[HB]
IMPACT
CHARPY-V, -196ºC
[J]
PRE
 ≥ 276  ≥ 650  ≥ 40  ≥ 140  ≥ 48

Heat Treatment

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

Weldability

Very good.

ALLOY 1.4562 / UNS N08031 / ALLOY 31 PLATES

DESCRIPTION KG/PLATE
3 X 2000 X 8000 MM 408
5 X 2000 X 8000 MM 680