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NiCo29-18 | 1.3981 Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country Predecessor VDA 231-106 classification
1.3981 (DIN 17745 : 2025-09) NiCo29-18 1.3981 DIN 17745 : 2025-09 Supersedes DIN 17745 : 2002-09 Valid Germany NiCo29-18 1.1.2 1)
1) Remark: Ferrous alloy with special thermal expansion Application: melting down in hard glass, glass/ceramic metal joints

Chemical Composition

C [%] Co [%] Mn [%] Ni [%] Si [%] Remainder
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Mechanical Properties

Condition Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Elongation A [%] Hardness HV
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Physical Properties

Temperature [°C] Melting Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Mean Coefficient of Thermal Expansion [10^-6*K^-1] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Specific Electrical Resistance [µΩm] Curie Temperature [°C]
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Cross Reference

Material Name Country Standard
12549 India IS 12549 1)
29NK-W1 Russia GOST 10994 1)
29НК-В1 Russia ГОСТ 10994 1)
F15 UNS K94610 USA ASTM F15 1)
F29 UNS K94610 USA ASTM F29 1)
K94610 USA UNS 1)
29Ni-54Fe-17Co USA SAE J470 1)
Kovar USA 1)
Nilo K USA 1)
Lockinvar USA 1)
Rodar USA 1)
Therlo USA 1)
KOVAR USA 1)
X3NiCo29-18 1)
Fe54Ni29Co17
1) Source: Stahlschlüssel 2019, Verlag Stahlschlüssel Wegst GmbH, Marbach