Duplex 2507 Stainless Steel

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Duplex 2507 Stainless Steel

Here at Best Stainless, we are happy to provide clients with high quality Super Duplex 2507 stainless steel, a 50/50 mixture of austenite and ferrite, which is stronger than either a pure austenitic or ferric alloy.  This steel possesses both high tensile and impact strength and is extremely corrosion resistant due to its chromium, molybdenum, and nitrogen content.  We can provide our customers with array of stock shapes; round, square, hex, and we provide the industry’s best long stock, in lengths up to 28’.

2507 super duplex is highly resistant to chloride pitting, and stress, crevice, and general corrosion.  It can stand up well to organic and inorganic acids alike. All these resilient attributes make it extremely useful in harsh environments and it is commonly used in chemical and petrochemical works, paper making facilities, and in marine contexts.  Best Stainless can furnish our customers with boat and pump shafts made from any of our stainless steels, including 2507. Our pump shafts are customizable for any project.

It has high thermal conductivity and a low rate of thermal expansion, allowing for use in heat exchangers and water heaters, though long term exposure to temperatures near or exceeding 600°F will lead to a decrease in strength.

Lastly, 2507 is stronger than more nickel based alloys, allowing for less material to do similar jobs, saving on cost and weight. It is also more workable and weldable than pure austenitic alloys.

2507 Super Duplex Applications

  • Cargo tanks
  • Fans
  • Fittings
  • Heat exchangers
  • Hot water tanks
  • Hydraulic piping
  • Lifting and pulley equipment
  • Propellers
  • Shafts
  • Spiral wound gaskets
  • Storage vessels
  • Water heaters
  • Wire

2507 Super Duplex Composition

  • Chromium 26.00
  • Nickel 8.00
  • Molybdenum 4.00
  • Manganese 1.20
  • Silicon 0.80
  • Copper 0.50
  • Nitrogen 0.32
  • Phosphorous 0.035
  • Carbon 0.030
  • Sulfur .015
  • Iron Balance

2507 Super Duplex Industry Standards

  • ASTM A-479-S32750
  • ASTM A-276
  • ASTM A-182 (53)
  • ASME A276/479
  • EN 10204 3.1
  • NACE MR0175/ISO 15156
  • API 6A PSL3
  • Norsok – M-630
  • MDS D57
  • Super Duplex
  • UNS S32750
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