Materials Portal Logo MATERIALS PORTAL

NiCo 29 18 | 1.3981 Material Datasheet

Unlock Exclusive Materials Data

Gain access to a wealth of materials data by joining our Materials Portal.

Register for Free or Upgrade for Full Access

Material Description

Material Number Material Name Material Number (single) Standard Standard Status Country VDA 231-106 classification
1.3981 (SEW 385 : 1991-07) NiCo 29 18 1.3981 SEW 385 : 1991-07 Valid Germany 1.1.2 1)
1) Remark: The iron alloy with special thermal expansion NiCo 29 18, material number 1.3981, is used for compounds of metal and glass, for example for fusions with hardened glass, for the bottom of TO casings, etched moulded parts, X-ray tubes, or for carriers. The break point temperature (temperature at which a break point in the expansion-temperature-curve occurs) is 425 degrees C. The material has low thermal expansion at 400 degrees C. The cupping index at 1 mm thickness is 9.5 mm.

Chemical Composition

C [%] Co [%] Mn [%] Ni [%] Si [%] Remainder
blur blur blur blur blur blur 1)2)
1) Source: blur
2) Remark: blur

Material Compliance

REACh RoHS
blur blur

Mechanical Properties

Condition Temperature [°C] Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Elongation A [%] Hardness HV
blur blur blur blur blur blur 1)2)
blur blur blur blur blur blur 3)4)
blur blur blur blur blur blur 3)5)
1) Source: blur
2) Remark: blur
3) Source: blur
4) Remark: blur
5) Remark: blur

Physical Properties

Temperature [°C] Melting Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Specific Electrical Resistance [µΩm] Mean Specific Heat Capacity [kJ/(kg*K)]
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 1)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
blur blur blur blur blur blur blur blur 2)
1) Source: blur
2) Source: blur

Welding and Joining

Procedure Welding and Joining - Evaluation Interpass Temperature [°C] Added Materials
blur blur blur blur 1)
1) Source: blur

Heat Treatment

Heat Treatment Temperature [°C]
blur blur 1)2)
blur blur 1)2)
1) Source: blur
2) Remark: blur

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

Producer/Supplier/Trade names

Tradename Supplier
1.3981 INTERSTAHL Service GmbH, Wetter
Alloy K ROPA STAHLVERTRIEB GMBH, Bad Bergzabern
Dilaton 2918 Deutsche Nickel GmbH, Schwerte
NiCo pauly STAHLHANDEL, Essen
NiCo 29 18 Hoesch Hohenlimburg GmbH, Hagen
NiCo 29 18 Chr. Höver & Sohn GmbH & Co. KG, Lindlar
NiCo 29 18 Enpar Sonderwerkstoffe GmbH, Gummersbach
NiCo 29 18 HEINE + BEISSWENGER Stiftung + Co.KG, Fellbach
NiCo 29 18 Remystahl GmbH & Co. KG, Hagen
NiCo 29 18 Ugitech SA, Ugine
NILO alloy K Special Metals Deutschland Ltd., Düsseldorf
P810 voestalpine BÖHLER Edelstahl GmbH & Co.KG, Kapfenberg
Pernifer 2918 VDM Metals GmbH, Werdohl
Werkstoff K ZAPP AG, Ratingen