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Key Benefits

  • Pitting and crevice corrosion resistance
  • Stress corrosion cracking (SCC) resistance
  • General corrosion resistance in acid and caustic environments
  • High mechanical strength
  • Good weldability using nickel alloy consumables

Fill out the form to learn more with one of our experts

Sanicro 35 for Refineries

Avoid performance tradeoffs

Sanicro® 35 (UNS: NO8935) is a breakthrough alloy that bridges the gaps between standard stainless steel and nickel alloys: a cost-effective way to address severe
corrosion challenges in a wide range of service conditions. Depending on the situation, it also offers a potential alternative to Alloy 625 or Alloy C-276.

What gaps will you fill with Sanicro® 35?

See how Sanicro® 35 fills the gaps as a costeffective alternative to high nickel alloys,
when the properties of a standard duplex or austenitic grade may be insufficient.

Chemical composition (nominal), % UNS N08935

C Si Mn P S Cr Ni Mo Cu N Fe
≤0.030 ≤0.4 0.8 ≤0.030 ≤0.020 27 35 6.5 0.2 0.30 Remainder

High structural stability

Thanks to balanced chemistry, Sanicro® 35 is not prone to intermetallic phases, ensuring maximum performance and stable welding properties.

Product Form Standard Sizes Common Applications
Heat Exchanger
Tubing		 OD 0.75 – 1" (19.05 – 25.4 mm)
WT 0.049 – 0.083" (1.24 – 2.11 mm)
Up to OD 1.65" (42 mm) available upon request
Standard: ASTM B163		 Refineries (CDU overheads, REACs, gas cleaning / Sour water, Petrochemical and Chemicals plants) chlorinated hydrocarbons, PTA, inorganic acids (e.g. phosphoric, sulphuric acid), organic acids (e.g. formic and acetic acid), Seawater cooled heat exchangers (all industries),
Biofuels and other renewable energy applications.
Hydraulic and
instrumentation
tubing		 OD 0.25 – 0.5" (6.35 – 12.7 mm)
WT 0.035 – 0.083" (0.89 – 2.11 mm)
From stock or for larger project offering
Standard: ASTM B163		 Refineries, Petrochemical and Chemical plants in coastal areas (high Cl-), Oil & Gas (wellhead
panels, X-mas trees, etc.), fuel lines for gas stations and vehicles, Marine & Shipbuilding,
Renewable energy. Elevated temperature exposure in corrosive enviornments (chlorides,
acids, etc).
Round Bar Dia. 0.78 – 9.44" (20 – 240 mm)
Standard: ASTM B163, ASTM B649		 Flanges, valves and discs, fittings, couplings, rings and seals, bolts and nuts, shafts, drilling tools, heat exchanger parts.
Seamless Pipe OD up to 4"
Standard: ASTM B677		 Oil & Gas (topside piping, subsea piping), Seawater handling piping systems, Chemical industry process piping (inorganic acids, organic acids, specialty chemicals).

Related Webinars

Webinar June 7, 2023
Sanicro 35: Bridging the gap between stainless and nickel alloys for refinery applications

Sanicro 35: Bridging the gap between stainless and nickel alloys for refinery applications

View the recorded webinar

Sanicro 35: Bridging the gap between stainless and nickel alloys for refinery applications

Related Articles

Technical article 3 February, 2023
Sanicro®35 (UNS: N08935) from Alleima is an alloy combining the best features of stainless steels and nickel alloys. This grade has excellent corrosion resistance for service in CDU overhead condenser tubes, seawater applications, and other highly corrosive environments.

Lifecycle of crude distillation unit overhead condenser tubes

Crude oil contains impurities that can cause heavy corrosion in various parts of the refinery. Refiners must deal with multiple challenges if they want to process the heavier, or so-called “opportunity” crudes.

Lifecycle of crude distillation unit overhead condenser tubes
Technical article 28 August, 2024
When making metallurgical upgrades in the petroleum refining and chemical process industries, there are many alloy options to choose from. Striking a good balance between corrosion performance and project economics is vital in material selection.

Sanicro® 35 - a super austenitic material solution

When making metallurgical upgrades in the petroleum refining and chemical process industries, there are many alloy options to choose from. Striking a good balance between corrosion performance and project economics is vital in material selection.

Sanicro® 35 - a super austenitic material solution
Technical article 26 January, 2023

Choosing the right material can advance the life of your heat exchanger

Heat exchangers are crucial in process industries. These include refineries, petrochemical, and chemical plants. They heat and cool process streams. They conserve energy in the plant and minimize additional heat from external sources by burning gas or oil or using electricity. The most common industrial heat exchanger is the shell-and-tube type.

Choosing the right material can advance the life of your heat exchanger

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