Sanicro® 35 (UNS N08935) Bar, Tube & Plate

Sanicro® 35 / UNS N08935 is an extremely strong nickel-molybdenum super austenitic grade designed for service in demanding, wet corrosive environments. This grade combines the best features of super austenitic stainless steel and nickel alloys. This makes it a highly cost-effective alternative to materials like pure nickel alloys, Super Austenitic, Duplex, and Super Duplex.

Excellent resistance to Hydrogen Induced Stress Corrosion (HISC).
Outstanding resistance to crevice corrosion in chloride environments and pitting corrosion.
Exceptional resistance to chloride-induced stress corrosion cracking (SCC).
Excellent corrosion resistance in natural seawater at 30°C (86°F).
Good resistance in hydrochloric acid environments, as well as sulfuric and nitric acid.
Extremely high impact strength combined with very high tensile strength and ductility.

Trademark

Sanicro®35 is a trademark owned & registred by Alleima AB (former Sandvik Materials Technology).

Available Formats and Dimensions

We supply Sanicro® 35 in the following formats: Round bar, pipe, hollow bar, and plates.

Applications
Thanks to its extremely high resistance to pitting and crevice corrosion, Sanicro® 35 is particularly suitable for applications in seawater and other high chloride concentration conditions. Typical applications include:
- Plate heat exchangers
- Tube, plate and shell of tubular heat exchangers
- Scrubbers
- Flue gas cleaning
- Carbon capture
- Sea water
- Brine
- Chlorinated acids
- Chlorinated hydrocarbons
- Chemical
- Petrochemical
- Refinery industry
- Inorganic acids
- Organic acids
- Fine chemicals
- Oil & gas equipment
- Biorefining
Heat Treatment & Weldability

Solution annealing:

At 1130°C (2066°F) followed by water quenching.

Weldability:

Good. Due to its very high purity, it is less prone to hot cracking than most nickel-base alloys.

Method:

TIG welding process (GTAW/141) is recommended, with a heat input of 1.2-1.5 kJ/mm and an interpass temperature of 100-150°C.

Preheating and post-weld heat treatment (PWHT) are not necessary.

Chemical Composition (nominal)

Element	Weight %
C (Carbon)	Max. 0.030
Mn (Manganese)	0.8
P (Phosphorus)	Max. 0.030
S (Sulfur)	Max. 0.020
Si (Silicon)	Max. 1.00
Cr (Chromium)	27
Ni (Nickel)	35
Mo (Molybdenum)	6.5
N (Nitrogen)	0.30
Cu (Copper)	0.2

Carbon (C)

Weight %: Max. 0.030

Manganese (Mn)

Weight %: 0.8

Phosphorus (P)

Weight %: Max. 0.030

Sulfur (S)

Weight %: Max. 0.020

Silicon (Si)

Weight %: Max. 0.5

Chromium (Cr)

Weight %: 27

Nickel (Ni)

Weight %: 35

Molybdenum (Mo)

Weight %: 6.5

Nitrogen (N)

Weight %: 0.3

Copper (Cu)

Weight %: Min. 0.2

PREN-value: %Cr + 3.3%Mo + 16%N ≥ 28

Standards and Approvals
- UNS: N08935
- ASTM B649 / ASME SB649
- Pressure Equipment Directive / PED (2014/68/EU)
- NACE MR0175 / ISO 15156-3 (Type 4a and 4c materials)
- NACE MR0103 / ISO 17495
Mechanical Properties (Specific for Round Bars)

Property Value

Proof/Yield strength (Rp0.2) ≥ 350 MPa

Tensile strength (Rm) ≥ 700 MPa

Elongation ≥ 40 %

Hardness (HBW) 190 – 205

Impact strength (RT) 300 – 500 J

Proof/Yield strength (Rp0.2)

Value: ≥ 350 MPa

Tensile strength (Rm)

Value: ≥ 700 MPa

Elongation

Value: ≥ 40 %

Hardness (HBW)

Value: 190 – 205

Impact strength (RT)

Value: 300 – 500 J

Property	Value
Proof/Yield strength (Rp0.2)	≥ 350 MPa
Tensile strength (Rm)	≥ 700 MPa
Elongation	≥ 40 %
Hardness (HBW)	190 – 205
Impact strength (RT)	300 – 500 J

Products and dimensions

Round Bar

To ensure you get the exact right solution for your project, please contact us directly at Sverdrup Steel. We are ready to advise you on specific dimensions, availability, and customized options.

Contact us here!
Plate

To ensure you get the exact right solution for your project, please contact us directly at Sverdrup Steel. We are ready to advise you on specific dimensions, availability, and customized options.

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Pipe

To ensure you get the exact right solution for your project, please contact us directly at Sverdrup Steel. We are ready to advise you on specific dimensions, availability, and customized options.

Contact us here!
Hollow Bar

To ensure you get the exact right solution for your project, please contact us directly at Sverdrup Steel. We are ready to advise you on specific dimensions, availability, and customized options.

Contact us here!

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Trademark

Available Formats and Dimensions

Applications

Heat Treatment & Weldability

Chemical Composition (nominal)

Carbon (C)

Manganese (Mn)

Phosphorus (P)

Sulfur (S)

Silicon (Si)

Chromium (Cr)

Nickel (Ni)

Molybdenum (Mo)

Nitrogen (N)

Copper (Cu)

Standards and Approvals

Mechanical Properties (Specific for Round Bars)

Proof/Yield strength (Rp0.2)

Tensile strength (Rm)

Elongation

Hardness (HBW)

Impact strength (RT)

Products and dimensions

Round Bar

Plate

Pipe

Hollow Bar

Related materials

718

625

Alloy 800HT

Alloy 31

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MP35N™ - NACE