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2507 Duplex

2507 Duplex

Nickel (Ni) - 7 Min
Chromium (Cr) - 25 Min
Molybdenum (Mo) - 4 Min
Iron (Fe) - 61.4 Balance
Manganese (Mn) - 1.2 Min
Other

Key

Nickel
Copper
Chromium
Aluminum
Molybdenum
Iron
Titanium
Manganese
Cobalt
Other
  • Nickel (Ni) 7 Min
  • Chromium (Cr) 25 Min
  • Molybdenum (Mo) 4 Min
  • Iron (Fe) 61.4 Balance
  • Manganese (Mn) 1.2 Min
  • Carbon (C) .03 Min
  • Silicon (Si) .8 Min
  • Phosphorus (P) .015 Min
  • Sulfur .015 Min

UNS S32750

2507 Duplex is the most popular of the nitrogen-strengthened duplex alloys. It has corrosion resistance equivalent to the 6% molybdenum alloys, such as AL6XN®. The minimum pitting resistance number for this material is 42. Depending on the source, a minimum pitting resistance number of 32 to 40 is required for service in seawater. Compared to 316L Stainless, it can range from 2 to 3 times as strong.

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Summary

  • Environment:
    Moderately Corrosive: Acids & Chemicals
  • Temperature Limit:
    570 °F / 299 °C
  • Ultimate Tensile (Typical):
    125 ksi / 862 mpa

Specifications & Technical Data

If your question isn’t answered below, download the technical data sheet here.

Specifications

  • Bar: ASTM A276

Applications

  • Desalination facilities & water reuse plants
  • Chemical process equipment, including pressure vessels, piping, heat exchangers, & storage tanks
  • Food, beverage, & pharmaceutical  process equipment
  • Offshore oil firewater and process water systems, blast & firewalls, and strake clamps
  • Downhole oil process & control tubing, control & wire lines, band clamps
  • Pulp mill digester & bleach washers
  • Architectural & infrastructure applications, including bridges and dam weirs

Physical Properties

Typical Physical Properties
Density 0.282 lb/in3
Melting Range 2570 – 2660 °F
Poisson’s Ratio 0.3
Electrical Resistivity 0.80 ohm mx10-6

 

Physical Properties of 2507 at High Temperatures
Temperature, °F  68  212  392  572
Coefficient* of Thermal Expansion,  in/in°F x 106  – 7.2 7.5 7.8
Thermal Conductivity, Btu • ft/ft2 • hr • °F  8.6 9.2 9.8 10.4
Modulus of Elasticity Dynamic, psi • 106  29 28.1 27 –

Mechanical Properties

Ultimate Tensile Strength, ksi  116 (min)
0.2% Yield Strength, ksi  80 (min)
Elongation, %  15 (min)
Hardness, HRC  32 (max)

 

Minimum Elevated Mechanical Properties, Plate
Temperature, ° F  212  392  482
Ultimate Tensile Strength, ksi  99 93 91
0.2% Yield Strength, ksi  65 58 55

Corrosion Resistance

Comparative Pitting Resistance
Alloy  PREn  Critical Pitting Temperature (CPT) °F
2507  42 185
2205 35 120
316L 24 64

PREn= Cr% + 3.3*Mo% +16*N% except for UNS S32760 where PREn= Cr% + 3.3*(Mo% + 0.5*W%) + 16*N%

Iso-corrosion Curves, 0.1mm/y in Sulfuric Acid

Iso-corrosion Curves, 0.1mm/y in Sulfuric Acid

Iso-corrosion Curves, 0.1mm/yr in Hydrochloric Acid

Iso-corrosion Curves, 0.1mm/yr in Hydrochloric Acid

 

In-stock

2507 Duplex Fasteners

Bolts & Screws
Set Screws
Socket Products
Vented Products
Nuts
Washers
Studs & Rods
U-bolts
Pins & Keys
Fittings
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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

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