UNS N14070 (Modified) / 1.3912 (Modified) / Ni70Fe

Nickel Alloy 70NB – Heat Resistance and Corrosion Resistance up to 900 °C

General Characteristics of 70NB

Nickel alloy 70NB (EI868) is a heat-resistant, corrosion-resistant material with a high nickel content (up to 71%) and chromium (up to 17%). Designed for operation in temperatures up to 900 °C, it features stable strength, excellent weldability, and reliable performance in aggressive gas and chemical environments.

Grade designation: 70NB / EI868Alloy type: heat-resistant, deformableOperating temperature: up to +900 °CStandards: GOST 5632-72, TU 14-1-3296-83

Chemical Composition of 70NB (%):

Ni — 68–71Cr — 15–17Si — 2.5–3.5Mn — ≤ 1.0Fe — ≤ 6.0Impurities (C, P, S) — ≤ 0.03

This composition ensures that the alloy maintains its mechanical strength and corrosion resistance even in sulfur-containing and aggressive environments.

Mechanical Properties:

Tensile strength: 600–800 MPaYield strength: 300–400 MPaHardness: 170–200 HBElongation at break: ≥ 25%Operating temperature: up to 900 °C

Applications

Nickel alloy 70NB is used in the following industries:

• Chemical industry – vessels, heat exchangers, reactors

• Energy sector – heat-resistant components, furnaces, combustion chambers

• Mechanical engineering – shafts, bearings, fasteners

• Metallurgy – furnace linings, pipe cladding

• Petrochemical industry – equipment for environments containing H₂S and acids

Advantages and Features

• Heat resistance up to 900 °C

• Excellent resistance to sulfur, acids, and industrial gases

• Good weldability with standard methods

• Long service life under thermal cycling

• Suitable for manufacturing critical components

Available Supply Formats

• Round bar: from 6 to 200 mm

• Plate / sheet: from 1.5 to 50 mm

• Wire, strip, flat bar – on request

• Custom blanks according to your drawing

Cutting, packaging, and delivery across the EU and CIS are available.

Buy Nickel Alloy 70NB

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Delivery Forms 70HB