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DIN 17744 NiCr22Mo7Cu Solution-Annealed Alloy – High Corrosion Resistance & Excellent Weldability

The material NiCr22Mo7Cu with the material number 2.4619 is applied for corrosion-resistant construction components in the form of strips, sheets, tubes, bars, wires and forgings. It is a further development of the material NiCr22Mo6Cu (material number 2.4618) and has an excellent resistant to pitting, crevice and stress cracking corrosion. The alloy is of good weldability and possesses good resistance to intergranular corrosion in the welded condition. The low carbon content prevents sensitizing and its results, i.e. intergranular corrosion of the heat affected zone of the welding seams. The material is oustandingly resistant to strongly corroding chloride- and fluoride-polluted sulphuric and phosphoric acid. Application for plants for the production and processing of sulphuric, phosphoric and nitric acid. For components in flue-gas desulphurization and waste incineration plants, in the paper and cellulose industry and for the extraction of acid gas. Processing properties: Formability: good Weldability: good

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.3 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

211 GPa

100.0 °C

205 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

186 GPa

500.0 °C

180 GPa

600.0 °C

173 GPa

700.0 °C

167 GPa

Elongation

20.0 °C

35 - 45 %

100.0 °C

60 %

200.0 °C

60 %

300.0 °C

65 %

400.0 °C

65 %

500.0 °C

65 %

600.0 °C

65 %

Hardness, Brinell

20.0 °C

240 [-]

Tensile strength

20.0 °C

585 - 620 MPa

100.0 °C

640 MPa

200.0 °C

590 MPa

300.0 °C

570 MPa

400.0 °C

550 MPa

500.0 °C

530 MPa

600.0 °C

500 MPa

Yield strength Rp0.2

20.0 °C

205 - 240 MPa

100.0 °C

270 MPa

200.0 °C

230 MPa

300.0 °C

210 MPa

400.0 °C

190 MPa

500.0 °C

180 MPa

600.0 °C

170 MPa

Yield strength Rp1.0

20.0 °C

225 - 260 MPa

100.0 °C

290 MPa

200.0 °C

260 MPa

300.0 °C

240 MPa

400.0 °C

220 MPa

500.0 °C

210 MPa

600.0 °C

200 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.43E-5 1/K

200.0 °C

1.47E-5 1/K

300.0 °C

1.5E-5 1/K

400.0 °C

1.53E-5 1/K

500.0 °C

1.57E-5 1/K

600.0 °C

1.61E-5 1/K

700.0 °C

1.65E-5 1/K

Melting point

1400 °C

Typical for Nickel Chromium Alloy

Specific heat capacity

20.0 °C

441 J/(kg·K)

100.0 °C

452 J/(kg·K)

200.0 °C

462 J/(kg·K)

300.0 °C

471 J/(kg·K)

400.0 °C

479 J/(kg·K)

500.0 °C

487 J/(kg·K)

600.0 °C

495 J/(kg·K)

700.0 °C

503 J/(kg·K)

Thermal conductivity

20.0 °C

10 W/(m·K)

100.0 °C

12.6 W/(m·K)

200.0 °C

14.3 W/(m·K)

300.0 °C

16 W/(m·K)

400.0 °C

17.7 W/(m·K)

500.0 °C

19.3 W/(m·K)

600.0 °C

21 W/(m·K)

700.0 °C

22.6 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.15E-6 Ω·m

100.0 °C

1.17E-6 Ω·m

200.0 °C

1.19E-6 Ω·m

300.0 °C

1.21E-6 Ω·m

400.0 °C

1.23E-6 Ω·m

500.0 °C

1.25E-6 Ω·m

600.0 °C

1.26E-6 Ω·m

700.0 °C

1.27E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.015 %

Chromium

21 - 23.5 %

Cobalt

5 %

Copper

1.5 - 2.5 %

Iron

18 - 21 %

Manganese

1 %

Molybdenum

6 - 8 %

Nickel

35.95 %

Phosphorus

0.03 %

Silicon

1 %

Sulfur

0.015 %

Tungsten

1.5 %


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